SITRANS F flowmeters SITRANS F O...DIN EN ISO 5176 and the VDI guidelines 2040. The bypass meter contains a conical glass tube (3) with float (4). The water flows vertically upwards

SITRANS F flowmetersSITRANS F O

Turbo-Lux orifice plate flowmeter

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■ Overview

SITRANS F O Turbo-Lux orifice plate flowmeter

■ Application

The SITRANS F O Turbo-Lux orifice plate flowmeter is used to measure the volume of water in closed pipelines. Any mounting position and flow direction are possible.

The main application is in stationary sprinkler systems. The flow-meter complies with the requirements of the Verband der Schadenversicherer e.V. (VdS) (association of damage insur-ers).

The product is manufactured by MECON GmbH and distributed by Siemens.

■ Mode of operation and design

The SITRANS F O Turbo-Lux orifice plate flowmeter consists of a differential pressure sensor (Fig. „Components and dimensions, 1) for stationary installation, and a portable bypass meter (2).

The differential pressure sensor largely corresponds to DIN EN ISO 5176 and the VDI guidelines 2040.

The bypass meter contains a conical glass tube (3) with float (4). The water flows vertically upwards through the glass tube. A by-pass orifice (5) is located at the top of the tube. A filter (6) at the inlet largely prevents the penetration of foreign matter.

The inlet and outlet for the flow measured in the bypass are ar-ranged concentrically so that it is easy to combine with the sta-tionary differential pressure sensor.

■ Installation of the differential pressure sensor

A straight pipe section to achieve non-turbulence and with a length depending on the diameter ratio β must be provided up-stream of the differential pressure sensor. When installing in sprinkler systems, note that the associated (German) guideline Form 3003 specifies 10 x D upstream and 5 x D downstream of the sensor.

Installation is possible in any pipe direction - horizontal up to ver-tical. However, make sure that the flow direction is according to the arrow on the instrument and that the differential pressure sampling tube (7) is horizontal. Provide sufficient space for con-nection of the bypass meter.

The concentric installation between the pipeline flanges is im-portant to guarantee observation of the tolerance. The center off-set must not exceed 0.5 mm (0.196 inch).

A centering assembly is available for every size of differential pressure sensor to assist centering.

■ Assembly of the bypass meter

The bypass meter can be used for all nominal diameters speci-fied. Empty the pipeline before loosening the screw cap (10) to prevent the leakage of liquid. Connect the meter, and screw tight using the union nut (9). The meter must always be positioned truly vertically so that the float (, 4) can move freely in the glass tube (3). Remove any foreign matter which has passed through the filter. Tighten the union nut and the screw cap by hand if possible. The threads must slide easily, e.g. by using grease.

To prevent water hammer, fill the pipeline slowly with water.

■ Measurement

Read the exact value once a constant flow has resulted, i.e. when the float is stable. Read the value at the largest diameter of the float. The pipeline must always be full.

When using the bypass meter, air bubbles will initially collect at the top, and must be removed. To do this, loosen the union nut (9) a little again during operation, and rotate the device by 360° so that the air bubbles can escape into the pipeline. Then tighten the union nut again.

■ Reading the measured value

The flow values corresponding to the % values read on the scale are listed on the rating plate for every nominal diameter. An ex-tended table, in which a flow value is assigned to each line on the % scale, can be found on page 4/252.

■ Maintenance

If the filter (6) is blocked by deposits, remove it and clean.

Keep the O-ring (8) and the G 1 thread of the orifice plate lubri-cated using grease.

Clean the glass tube when contamination is visible.

Removal:

Following removal of the pressure plug (11), the orifice plate in-sert (12) can be removed by gently rotating. Then remove the glass tube from the fitting.

Caution!

Damage to the bypass orifice ( 5) has an effect on the accuracy, and should absolutely be avoided.



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SITRANS F O Turbo-Lux, components and dimensions in mm (inches)

Installation examples

Connections Dimensions Weight

PN 10 (MWP 145 psi)

A ±0.5 (0.020) ∅ D ±0.5 (0.020)

DN mm (inch) mm (inch) kg (lb)

80 (3“) 130 (5.12) 138 (5.43) 1.3 (2.87)

100 (4“) 140 (5.51) 158 (6.22) 1.6 (3.53)

150 (6“) 165 (6.50) 212 (8.35) 2.1 (4.63)

200 (8“) 190 (7.48) 268 (10.55) 3.0 (6.61)

250 (10“) 215 (8.46) 320 (12.60) 4.0 (8.82)

Display unit - - 0.9 (1.98)



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Centering assembly

■ Technical specifications

Application See page 4/249

Mode of operation See page 4/249

Measuring principle Orifice plate as differential pres-sure sensor with float bypass meter

Inlet

Nominal diameters DN 80 (3 inch)DN 100 (4 inch)DN 150 (6 inch)DN 200 (8 inch)DN 250 (10 inch)

Nominal pressure PN 10 (MWP 145 psi)

Pressure limit Max. 10 bar (145 psi)

Accuracy Class 2.5 (according to VDE/VDI 3513)

Rated operating conditions

Temperature limits Max. 70 °C (158 °F)

Design

Materials ()

• Differential pressure sensor (1) Aluminium, mat. No. 3.2582.05

• Differential pressure sampling tube (7)

Mat. No. 2.0380 (Ms58)

• Float (4) Stainless steel, mat. No. 1.4571/316Ti

• Bypass orifice (5) Stainless steel, mat. No. 1.4571/316Ti

• Filter (6) Stainless steel, mat. No. 1.4571/316Ti

• Gasket (13) Buna M

Certificates and approvals

Classification according to pressure equipment guideline (DGRL 97/23/EC)

For liquids of fluid group 2; com-plies with requirements of article 3, paragraph 3 (sound engineer-ing practice SEP)

Selection and Ordering data Order No.

SITRANS F Oorifice plate flowmeter, Turbo-Lux

7 M E 5 8 3 0 -

77777 - 7A A 0

Orifice plateWithout 0DN 80 (3 inch) 1DN 100 ( 4 inch) 2DN 150 ( 6 inch) 3DN 200 ( 8 inch) 4DN 250 (10 inch) 5

Centering assemblyWithout A

DN 80 (3 inch) BDN 100 (4 inch) CDN 150 (6 inch) E

DN 200 (8 inch) FDN 250 (10 inch) GCentering sockets (4x) H

Bypass meterWithout (standard) AWith bypass meter B

CaseWithout (standard) 0With case 1

Replacement screw capWithout (standard) 0With screw cap, including gasket 1

Calibration certificateWithout (standard) 0With calibration certificate 1



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■ Flow table for bypass meter

■ Pressure loss data

Display Flow quantity - water

% DN 80 l/min

(3 inch)(USgpm)

DN 100 l/min

(4 inch)(USgpm)

DN 150 l/min

(6 inch)(USgpm)

DN 200 l/min

(8 inch)(USgpm)

DN 250 l/min

(10 inch)(USgpm)

100 2100 (555) 3000 (793) 6000 (1585) 12000 (3170) 18000 (4756)

98 2058 (544) 2940 (777) 5880 (1553) 11760 (3107) 17640 (4660)

96 2016 (533) 2880 (761) 5760 (1522) 11520 (3044) 17280 (4565)

94 1974 (522) 2820 (745) 5640 (1490) 11280 (2980) 16920 (4470)

92 1932 (510) 2760 (729) 5520 (1458) 11040 (2917) 16560 (4375)

90 1890 (499) 2700 (713) 5400 (1427) 10800 (2853) 16200 (4280)

88 1848 (488) 2640 (697) 5280 (1395) 10560 (2790) 15840 (4185)

86 1806 (477) 2580 (682) 5160 (1363) 10320 (2727) 15480 (4090)

84 1764 (466) 2520 (666) 5040 (1332) 10080 (2663) 15120 (3995)

82 1722 (455) 2460 (650) 4920 (1300) 9840 (2600) 14760 (3900)

80 1680 (444) 2400 (634) 4800 (1268) 9600 (2536) 14400 (3804)

78 1638 (433) 2340 (618) 4680 (1236) 9360 (2473) 14040 (3709)

76 1596 (422) 2280 (602) 4560 (1205) 9120 (2410) 13680 (3614)

74 1554 (411) 2220 (587) 4440 (1173) 8880 (2346) 13320 (3519)

72 1512 (399) 2160 (571) 4320 (1141) 8640 (2283) 12960 (3424)

70 1470 (388) 2100 (555) 4200 (1110) 8400 (2219) 12600 (3329)

68 1428 (377) 2040 (539) 4080 (1078) 8160 (2156) 12240 (3234)

66 1386 (366) 1980 (523) 3960 (1046) 7920 (2092) 11880 (3139)

64 1344 (355) 1920 (507) 3840 (1015) 7680 (2029) 11520 (3044)

62 1302 (344) 1860 (491) 3720 (983) 7440 (1966) 11160 (2948)

60 1260 (333) 1800 (476) 3600 (951) 7200 (1902) 10800 (2853)

58 1218 (322) 1740 (460) 3480 (919) 6960 (1839) 10440 (2758)

56 1176 (311) 1680 (444) 3360 (888) 6720 (1775) 10080 (2663)

54 1134 (300) 1620 (428) 3240 (856) 6480 (1712) 9720 (2568)

52 1092 (288) 1560 (412) 3120 (824) 6240 (1649) 9360 (2473)

50 1050 (277) 1500 (396) 3000 (793) 6000 (1585) 9000 (2378)

48 1008 (266) 1440 (380) 2880 (761) 5760 (1522) 8640 (2283)

46 966 (255) 1380 (365) 2760 (729) 5520 (1458) 8280 (2188)

44 924 (244) 1320 (349) 2640 (697) 5280 (1395) 7920 (2092)

42 882 (233) 1260 (333) 2520 (666) 5040 (1332) 7560 (1997)

40 840 (222) 1200 (317) 2400 (634) 4800 (1268) 7200 (1902)

35 735 (194) 1050 (277) 2100 (555) 4200 (1110) 6300 (1664)

30 630 (166) 900 (238) 1800 (476) 3600 (951) 5400 (1427)

25 525 (139) 750 (198) 1500 (396) 3000 (793) 4500 (1189)

20 420 (111) 600 (159) 1200 (317) 2400 (634) 3600 (951)

Flow ∆p mbar (psi)

20% 13.6 (0.19)

50% 85.0 (1.23)

100% 340.0 (4.93)


N4 orifice flowmeter

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■ Overview

SITRANS F O N4 orifice flowmeter

■ Application

The SITRANS F O N4 orifice flowmeter is used to measure the flow of transparent liquids in closed piping. Any mounting loca-tion, position and flow direction can be selected for the flowme-ter. The flowmeter can also be used for flow monitoring if equipped with limit contacts.

The product is manufactured by MECON GmbH and distributed by Siemens.

■ Design and mode of operation

The SITRANS F O N4 orifice flowmeter primarily consists of an orifice plate as the sensor and a float as the display element. A differential pressure is produced across the orifice plate which is fitted in the main stream between two flanges in the piping. In a bypass, this differential pressure produces a volume flow in a variable area meter. The height of the float indicates the flow rate. The flow is read at the position of the float’s widest diameter.

■ Benefits

• Suitable for any mounting positions without reduction in accu-racy

• Complies with requirements for treatment and disinfection of swimming/bathing pools (DIN 19 643)

• Simple installation • Direct visualization of flow rate in bypass.

■ Installation and startup

• The measuring regulations for the flow DIN EN ISO 5167 not only include the version of orifice units but also require an in-stallation conforming to standards so that the indicated uncer-tainty in measurement can be kept. The standard installation must already be considered during the projecting of the pipe-line. The orifice unit must be installed in a straight pipeline which is long enough. Bends, valves and the like must be in-stalled in such a distance of the orifice unit that the trouble has faded there. Orifice units with large diameters are highly sen-sitive to troubles.

• Observe the recommendations with respect to inlet and outlet pipe sections for the orifice plate according to DIN EN ISO 5167.

• Align the orifice plate with the sharp edge (+ sign) towards the inlet side

• Insert the differential pressure sensor with gaskets concentri-cally between the pipe flanges, and tighten uniformly

• Loosen the union nut (G2), and align the display unit vertically downwards. Tighten the union nut again. When using floats with magnets and contact switches for the first time, move the float completely past the contact to permit polarization.

■ Maintenance

Contamination, especially around the bypass orifice, may lead to faults in the measurement. The bypass orifice plate can be dismounted and cleaned without interrupting the main flow if the ball valves are closed first.

■ Contact assembly

The bistable contact assembly K18 consists of a contact spring set sealed in a glass tube filled with protective gas. The contact springs are polarized by a fixed magnet such that they exhibit a bistable response.

Retrofitting of contact switches is only possible if the floats used are equipped with magnets.

Two contacts can be selected:• K18 A: contact closes when the limit is fallen below• K18 B: contact closes when the limit is exceeded.

Measuring principle



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SITRANS F O N4, dimensions in mm (inch)

Application See page 4/253

Mode of operation See page 4/253

Measuring principle Orifice plate as differential pres-sure sensor with variable area meter in bypass

Input

Flow Any

Rated operating conditions

Ambient conditions

Temperature and pressure limits

• With water and non-corrosive liquids

≤ 40 °C (104 °F) 10 bar (145 psi)50 °C (122 °F) 6.25 bar (90.64 psi)60 °C (140 °F) 2.5 bar (36.25 psi)

• With corrosive liquids ≤ 20 °C (68 °F) 10 bar (145 psi)40 °C (104 °F) 4 bar (58 psi)60 °C (140 °F) 1 bar (14.5 psi)

Medium conditions

• Accuracy ± 2% of full-scale value

• Measuring range See Table on page 4/255

- For liquids 1.2 to 1600 m³/h/5.28 to 7045 USgpmA special scale must be provided for liquids with a density other than 1 kg/l (62.43 lb/cu.ft)

• Dimension for measured variable m3/h

Viscosity limits for all measuring ranges

1.0 to 1.3 mPa·s (cp)

Design

Metering tube connections Ring between DIN flanges of nominal pressure rating PN 10 (MWP 145 psi) DN 40 (1½") to DN 400 (16") (DIN 2501)

Inlet and outlet pipe sections According to DIN EN ISO 5167, see also SITRANS F O delta p: Inlet and outlet pipe sections

Wetted parts materials

• Ring PVC

• Orifice plate PVC; stainless steel, mat. No. 1.4571/316Ti, as option

• Flow tube Trogamid T can be used with water up to 50 °C (122 °F), other-wise up to 60 °C (140 °F) or polysulfone for use up to 60 °C (140 °F)

• Ball cocks PVC

• Connecting tube PVC

• Float Stainless steel, mat. No. 1.4305/303, optional: stainless steel, mat. No. 1.4571/316Ti, PVC

• Limits Polysulfone

• Gasket Buna N/neoprene

• Bypass orifice plate Stainless steel, mat. No. 1.4571/316Ti, optional PVC

Certificates and approvals

Classification according to pressure equipment guideline (DGRL 97/23/EC)

For liquids of fluid group 2; com-plies with requirements of article 3, paragraph 3 (sound engineer-ing practice SEP)

Contacts

K18 A Closes when the limit is fallen below

K18 B Opens when the limit is fallen below

Housing/plug PP/PA 6

Contact material Rhodium

Degree of protection IP 65

Ambient temperature -20 to +60 °C (-4 to +140 °F)

Max. switching frequency 5/min

Max. rating K18 A/B AC 250 V/0.5 A/10 VADC 250 V/0.5 A/5 WRating data apply to resistive loads; a suppressor circuit is required for inductive loads

DN L mm (inch)

∅ D mm (inch)

40 (1½“)50 (2“)65 (2½“)80 (3“)

100 (4“)125 (5“)150 (6“)200 (8“)250 (10“)300 (12“)350 (14“)400 (16“)

269 (10.59)276 (10.87)286 (11.26)294 (11.57)304 (11.97)319 (12.56)331 (13.03)359 (14.13)385 (15.16)410 (16.14)444 (17.48)466 (18.35)

88 (3.46)102 (4.02)122 (4.80)138 (5.43)158 (6.22)188 (7.40)212 (8.35)

268 (10.55)320 (12.60)370 (14.57)430 (16.93)482 (18.98)



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■ Measuring ranges (liquids)

Standard measuring ranges for liquid (ρ = 1 kg/l (62.43 lb/cu.ft), viscosity 1 mPa·s (1 cp))

Nominal diameter Measuring range(input pressure ≥ 0.5 bar / 7.25 psi) Pressure consumption Diameter ratio Weight

DN (inch) m3/h (USgpm) ∆p mbar (psi) ß kg (lb)

40 (1½)1.2 to 6

2 to 103.2 to 16

(5.28 to 26.4)(8.8 to 44)

(14.1 to 70)

335275200

(4.86)(3.99)(2.90)

0.480.600.73

1.5 (3.31)

50 (2)2 to 103 to 155 to 25

(8.8 to 44)(13.2 to 66)

(22 to 110)

330280200

(4.79)(4.06)(2.90)

0.490.590.73

1.6 (3.53)

65 (2½)3.2 to 16

6 to 308 to 40

(14.1 to 70)(26.4 to 132)

(35 to 176)

330250210

(4.79)(3.63)(3.05)

0.480.640.72

1.8 (3.97)

80 (3)5 to 25

10 to 5013 to 65

(22 to 110)(44 to 220)(57 to 286)

330240200

(4.79)(3.48)(2.90)

0.490.660.74

1.9 (4.19)

100 (4)10 to 5016 to 8020 to 100

(44 to 220)(70 to 352)(88 to 440)

300235200

(4.35)(3.41)(2.90)

0.550.670.73

2.0 (4.41)

125 (5)13 to 6524 to 12032 to 160

(57 to 286)(106 to 528)(141 to 704)

325245200

(4.71)(3.55)(2.90)

0.500.660.74

2.3 (5.07)

150 (6)20 to 10032 to 16050 to 250

(88 to 440)(141 to 704)(220 to 1100)

315245180

(4.57)(3.55)(2.61)

0.520.640.76

2.5 (5.51)

200 (8)34 to 17060 to 30080 to 400

(150 to 749)(264 to 1321)(352 to 1761)

320250200

(4.64)(3.63)(2.90)

0.510.650.73

3.1 (6.83)

250 (10)50 to 25080 to 400

130 to 650

(220 to 1100)(352 to 1761)(572 to 2862)

250270195

(3.63)(3.92)(2.83)

0.500.610.74

3.5 (7.72)

300 (12)80 to 400

120 to 600200 to 1000

(352 to 1761)(528 to 2642)(881 to 4403)

315265180

(4.57)(3.84)(2.61)

0.520.620.76

4.1 (9.04)

350 (14)100 to 500200 to 1000270 to 1300

(440 to 2202)(881 to 4403)

(1189 to 5724)

325235190

(4.71)(3.41)(2.76)

0.500.670.75

5.1 (11.24)

400 (16)140 to 700240 to 1200320 to 1600

(616 to 3082)(1057 to 5284)(1409 to 7045)

320250200

(4.64)(3.63)(2.90)

0.510.650.73

5.8 (12.79)



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Selection and Ordering data Order No. Order code

SITRANS F O N4orifice flowmeter

7 M E 5 8 3 2 -

7777 0 - 7777 777

Flow tube• Trogamid (standard) 0• Polysulfone (only with special measuring

range)1

Nominaldiameter

Measuring rangein m3/h (USgpm)

• DN 40 (1½“)

1.2 ... 6 (5.28 ... 26.4) A A2 ... 10 (8.8 ... 44) A B3.2 ... 16 (14.1 ... 70) A CSpecial meas. range (specify in plain text)

A Z J 1 Y

• DN 50 (2“)

2 ... 10 (8.8 ... 44) B A3 ... 15 (13.2 ... 66) B B5 ... 25 (22 ... 110) B CSpecial meas. range (specify in plain text)

B Z J 1 Y

• DN 65(2½“)

3.2 ... 16 (14.1 ... 70) C A6 ... 30 (26.4 ... 132) C B8 ... 40 (35 ... 176) C CSpecial meas. range (specify in plain text)

C Z J 1 Y

• DN 80(3“)

5 ... 25 (22 ... 110) D A10 ... 50 (44 ... 220) D B13 ... 65 (57 ... 286) D CSpecial meas. range (specify in plain text)

D Z J 1 Y

• DN 100(4“)

10 ... 50 (44 ... 220) E A16 ... 80 (70 ... 352) E B20 ... 100 (88 ... 440) E CSpecial meas. range (specify in plain text)

E Z J 1 Y

• DN 125(5“)

13 ... 65 (57 ... 286) F A24 ... 120 (106 ... 528) F B32 ... 160 (141 ... 704) F CSpecial meas. range (specify in plain text)

F Z J 1 Y

• DN 150(6“)

20 ... 100 (88 ... 440) G A32 ... 160 (141 ... 704) G B50 ... 250 (220 ... 1,100) G CSpecial meas. range (specify in plain text)

G Z J 1 Y

• DN 200(8“)

34 ... 170 (150 ... 749) H A60 ... 300 (264 ... 1,321) H B80 ... 400 (352 ... 1,761) H CSpecial meas. range (specify in plain text)

H Z J 1 Y

• DN 250(10“)

50 ... 250 (220 ... 1,100) J A80 ... 400 (352 ... 1,761) J B130 ... 650 (572 ... 2,862) J CSpecial meas. range (specify in plain text)

J Z J 1 Y

• DN 300(12“)

80 ... 400 (352 ... 1,761) K A120 ... 600 (528 ... 2,642) K B200 ... 1.000 (881 ... 4,403) K CSpecial meas. range (specify in plain text)

K Z J 1 Y

• DN 350(14“)

100 ... 500 (440 ... 2.202) L A200 ... 1.000 (881 ... 4.403) L B270 ... 1.300 (1.189 ... 5.724) L CSpecial meas. range (specify in plain text)

L Z J 1 Y

• DN 400(16“)

140 ... 700 (616 ... 3,082) M A240 ... 1.200 (1057 ... 5,284) M B320 ... 1.600 (1409 ... 7,045) M CSpecial meas. range (specify in plain text)

M Z J 1 Y

FloatMaterial• Standard

- Mat. No. 1.4305/303 0• For special measuring range

- Mat. No. 1.4571/316Ti 1- Mat. No. 1.4571/316Ti with magnet 2- PVC, weighted 3- PVC, weighted, with magnet 4

Contacts

(only with magnetic float)• Without (standard) 0• Contact K18/A (closes when limit is fallen

below)1

• Contact K18/B (closes when limit is ex-ceeded)

2

• 2 contacts K18/A 3• 2 contacts K18/B 4• 1 each K18/A and K18/B 5

Orifice• PVC (standard) AW• Stainless steel, mat. No. 1.4571

- Nominal diameter DN 40 (1½“) B A- Nominal diameter DN 50 (2“) B B- Nominal diameter DN 65 (2½“) B C

- Nominal diameter DN 80 (3“) B D- Nominal diameter DN 100 (4“) B E- Nominal diameter DN 125 (5“) B F

- Nominal diameter DN 150 (6“) B G- Nominal diameter DN 200 (8“) B H- Nominal diameter DN 250 (10“) B J

- Nominal diameter DN 300 (12“) B K- Nominal diameter DN 350 (14“) B L- Nominal diameter DN 400 (16“) B M

Calibration certificate• Without (standard) 0• With calibration certificate 1

Further designs Order code

Please add "-Z" to Order No. and specify Order code(s).

Measured mediumSpecify in plain text:Medium, measuring range, dimension, density, density dimension, viscosity, viscosity dimension, operating temperature, operating pressure

Y01

Silicone-free version Y04

Medium: waterViskosity: 1 mPa·s (1 cp)Density: 1 kg/l (62.43 lb/cu.ft)

Y05

Special version: Specify in plain text Y99

Selection and Ordering data Order No. Order code

SITRANS F O N4orifice flowmeter

7 M E 5 8 3 2 -

7777 0 - 7777 777

SITRANS F flowmetersSITRANS F O delta p - Primary differential pressure devices

Technical description

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Primary differential devices according to DIN 1952, July 1982/DIN EN ISO 5167

■ Overview

Primary differential pressure devices are standardized, mechan-ical flow sensors.

Through constriction of the line diameter in the device the flow creates a differential pressure that is converted with the help of a differential pressure transmitter into a proportional current sig-nal or flow value. The assignment of differential pressure to flow is created by means of an orifice plate calculation.

Primary differential pressure devices are suitable for single-phase media such as gas, vapor and liquids without solid com-ponents.

On lines with small nominal diameters (DN 10 to DN 50) the mea-surements are influenced by the wall roughness and diameter tolerances of the pipes. These influences are counteracted by using metering pipes with fitting inlet and outlet pipe sections made of precision pipes. The flow coefficient C must be deter-mined by experiment to permit exact measurements with meter-ing pipes.

Precondition for ordering a primary differential pressure device

The orifice plate calculation and the classification according to the pressure equipment directive (PED) are necessary precon-ditions for placing an order. The complete data of the measuring point are thus required. Details of installation conditions, flow conditions, corrosiveness/resistance and properties of the me-dia are needed in addition. Pressure conditions, permissible pressure losses and accuracy requirements must be consid-ered.

The order must be accompanied by a filled-in calculation sheet ("Questionnaire for calculation of a primary differential pressure device according to DIN EN ISO 5167) and the questionnaire on the pressure equipment directive "Questionnaire for manufac-ture according to the pressure equipment directive (PED), direc-tive 97/23/EC".

You will find the questionnaires under "Questionnaire for calcula-tion of a primary differential pressure device according to DIN EN ISO 5167) and "Questionnaire for manufacture accord-ing to the pressure equipment directive (PED), 97/23/EC".

More information is available under "Calculation of primary differ-ential pressure devices" and "Pressure equipment directive 97/23/EC".

■ Benefits

• Primary differential pressure devices are very robust and can be used in a wide range of nominal diameters.

• Suitable for wide ranges of temperature and pressure.• No calibration required as the process is standardized.• The electronics required in addition can be used over a long

distance from the measuring location.• The differential pressure method is well known and has a large

installed base.• The electronics is easy to parameterize anew if process data

should change. Adaptation is by recalculation and reparame-terization of the transmitter or, in the case of the version with annular chamber orifice plate, by using a new orifice disk.

■ Application

Power stations

Measurement of steam, condensate and water.

Petrochemical industry

Measurement of water, steam and liquid and gas hydrocarbons.

Chemical industry

Measurement of various liquid and gas media.

■ Design

Annular chamber orifice

Orifice plates on the version with annular chamber orifice plate consist of two support rings which are connected to the inside of the pipe by way of an annular chamber and an annular gap. Tap-ping sockets direct the differential pressure from the support rings through shut-off fittings and differential pressure lines to the differential pressure transmitter.

Inserted between the supported rings is the orifice disk with a gasket.

Orifice plate with single tappings

On the version of the orifice plate with single tappings the orifice plate is one unit. The inside of the tube is connected to the tap-ping sockets by two single tappings.

The orifice plate is installed between two flanges in the pipeline.

Nominal diameters Nominal pressures

Orifice plates with annular chambers DN 50 ... DN 1000(2” … 40”)

PN 6 ... PN 100(MWP 87 … 1450 psi)

Orifice plates with single tappings DN 50 ... DN 500(2” … 20”)

PN 6 ... PN 315(MWP 87 … 4570 psi)

Metering pipes

• Orifice plate with annular chambers, mounted between flanges

DN 10 ... DN 50(3/8” … 2”)

PN 10 ... PN 100(MWP 145 … 1450 psi)

• Orifice plate with single tappings, mounted between flanges

DN 10 ... DN 50(3/8” … 2”)

PN 10 ... PN 160(MWP 145 … 1450 psi)



4/258 Siemens FI 01 · 2006

4

■ Function

Mode of operation

The orifice plate creates a differential pressure. The pressure is transferred through the vertical columns of medium in the differ-ential pressure lines to the measuring cell of the differential pres-sure transmitter. The transmitter converts the pressure signal with square-root characteristic into a flow-proportional current or into a digital signal, e.g. PROFIBUS.

Types of primary differential pressure devices

Shapes of the orifice disk aperture

The primary differential pressure devices are manufactured ac-cording to DIN EN ISO 5167. According to this, the application range of the standard orifice disk aperture form A is limited by the Reynolds number. The limits depend on the diameter ratio β = d/D. (D: internal diameter of pipe).

In the case of Reynolds numbers from approx. 10³ ... 105, the or-ifice disk aperture form B (quarter circle) can be used for slightly less accurate measurements. The profile radius r depends on the diameter ratio ß and results from the calculation of the diam-eter of the orifice disk aperture d.

The cylindrical orifice disk aperture form D is used for measure-ments in both flow directions.

Tapping sockets

Type of threaded connections and welding connections depen-dent on the measured medium and the nominal pressure of the shut-off fitting

The type of socket connections depends on the measured me-dium and the nominal pressure of the shut-off fittings; the socket length depends on the nominal diameter (pipe diameter) of the primary differential pressure device and the operating tempera-ture (because of the thermal insulation!); the socket position de-pends on the measured medium and the flow direction.

Other connections on request.

Threaded connections of tapping socket, dimensions in mm

Welding connections of tapping sockets, dimensions in mm

Position of the tapping sockets

The arrangement of the tapping sockets is optional when mea-suring liquids and gases; the compensation vessels must be at the same height when measuring steam.• Horizontal steam lines

Horizontal pipe in front of a wall with primary differential pressure device and valve combination; with annular chamber orifice plate or single part orifice plate with special length of 65 mm

In the case of horizontal steam lines, straight sockets are ar-ranged opposite each other or, if the pipe is close to a wall, bent sockets on one side.• Vertical steam lines

Vertical steam line with primary differential pressure device and valve combination

In the case of vertical and inclined steam pipes, the lower socket is bent upwards so that the connection flanges and compensa-tion vessels are also at the same height in this case.��F�

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4/259Siemens FI 01 · 2006

4

Extract from DIN 19 205, Part 1, August 1988

1) Not possible with orifice plates with single tappings (overall length 40 mm). Special length of 65 mm is possible.

2) Only possible with orifice plates with annular chambers (overall length 65 mm) with bent-up tapping sockets.

3) Angle γ is dependent on the nominal pressure and nominal diameter in accordance with DIN 19 205.

Principle of the differential pressure method

Principle of the differential pressure method: Pressure curve at a pipe re-striction

A primary differential pressure device is installed at the measur-ing point to measure the flow. This restricts the pipe and has two connections for sampling the differential pressure. If the proper-

ties of the primary device and the medium are known such that the equation below can be evaluated, the differential pressure is a measure of the absolute flow. No comparison measurements are required; the flow measurement can be checked indepen-dent of the device manufacturer.

The differential pressure method is based on the law of continu-ity and Bernoulli’s energy equation.

According to the law of continuity, the flow of a moving medium in a pipe is the same at all points. If the cross-section is reduced at one point, the flow rate must increase at this point. According to Bernoulli’s energy equation, the energy content of a flowing medium is constant and is the total of the static (pressure) and kinetic (movement) energies. An increase in the flow rate there-fore results in a reduction in the static pressure (see the figure "Principle of the differential pressure method: Pressure curve at a pipe restriction"). This pressure difference∆p, the so-called dif-ferential pressure, is a measure of the flow.

In general the following equation applies: q = c√∆p

Where:• q: Flow (qm, qv) mass flow or volume flow• ∆p: Differential pressure• c: Factor depending on the dimensions of the pipe, the type of

restriction, the density of the flowing medium etc.

According to this equation, the differential pressure created by the restriction is proportionally equal to the square of the flow (see the figure "Relationship between flow q and differential pressure ∆p").

No. Pipe position and flow direction

Posi-tion of the tap-ping sockets

Applica-tion

1 Horizontal → 180°

With com-pensa-tion vessels

2 1)2) 0°

3 1) 2)

4 Vertical Rising ↑ 90°

5 Falling ↓

6 Rising ↑ 180°

7 Falling ↓

10 Horizontal → <γ ³)

Without compen-sation vessels

11 Horizontal, verti-cal

→ ↓ ↑ 180°

13 Vertical ↓ ↑ 90°



4/260 Siemens FI 01 · 2006

4

■ Integration

The orifice plate is installed between flanges in the pipeline. Us-ing compensation vessels (for steam) and initial shut-off valves the differential pressure of the high-pressure side and low-pres-sure side is directed through differential pressure lines to a mul-tiple valve manifold and on to the differential pressure transmit-ter. For media with extreme pressure and temperature fluctuations it makes sense to take an additional measurement of the pressure and temperature in order to correct the flow signal of the transmitter in a subsequent correction computer.

Selection of mounting point

The flow measuring regulations DIN EN ISO 5167 do not only consider the design of primary differential pressure devices, but also assume that their installation is in accordance with the stan-dard so that the specified tolerances can be retained. Installa-tion in accordance with the standard should already be consid-ered when planning the pipeline. Particular attention must be paid to ensure that the primary device can be fitted in a suffi-ciently long straight section of pipe. Bends, valves and similar must be fitted so far upstream of the primary device that their ef-fects have died away. Primary devices with a large diameter ra-tio are particularly sensitive to interferences.

Design of measuring point

The design of the measuring point depends on the medium and on the spatial conditions. The designs for gas and water only dif-fer in the arrangement of the tapping sockets (see the figure "Ar-rangement"); compensation vessels must additionally be pro-vided for steam.

■ Options

• ASME versions in plain text with extra charge• Other overall lengths in plain text• Other materials on request• Sealing face with recess of groove in plain text with extra

charge• Flushing rings in addition in plain text with extra charge• Other tapping sockets on request, multiple tappings on re-

quest• Material acceptance test certificates or cold water pressure

test on request

■ Characteristic curves

The orifice plate has a square-law relationship between differen-tial pressure and flow. A square-root transmitter is required therefore to create a linear flow characteristic.

Relationship between flow q and differential pressure ∆p

■ More information

• Standards• Instruction Manual SITRANS P• Installation Instructions

q 0 1 3 5 8 10 15 20 30 40 50 60 70 80 90 100 %∆p 0 0.01 0.09 0.25 0.64 1 2.25 4 9 16 25 36 49 64 81 100 %

Setting range for application point of square-rooted charateristicfor SITRANS P differential pressure transmitter



4/261Siemens FI 01 · 2006

4

Design of measuring point with gas measurement as example (non-corrosive, non-hazardous)

Arrangement


The technical properties of the orifice plates depend on the de-vice:• Nominal diameters• Nominal pressure• Materials• Mass• Temperature limits

■ Accessories

• Compensation vessels• Threaded flange pairs• Primary shut-offs• Valve manifold• Differential pressure lines (to be provided by the plant owner)• Gaskets, bolts, screws (to be provided by the plant owner)• Differential pressure transmitter

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State of medium Liquid Gas Vapor

Arrangement

1 Orifice4 Valve manifold5 Transmitter


Pressure equipment directive 97/23/EC

4/262 Siemens FI 01 · 2006

4

■ Overview

The pressure equipment directive 97/23/EC applies to the align-ment of the statutory orders of the European member states for pressure equipment. Such equipment in the sense of the direc-tive includes vessels, pipelines and accessories with a maxi-mum permissible pressure of more than 0.5 bar above atmo-spheric.

The pressure equipment directive can be used starting Novem-ber 29, 1999 and is compulsory starting May 29, 2002.

Division according to the danger potential

Equipment is divided in line with the pressure equipment direc-tive according to the danger potential (medium/pressure/vol-ume/nominal diameter) into the categories I to III or Article 3 Paragraph 3.

The following criteria are decisive for assessment of the danger potential and are also shown in the diagrams (see "Characteris-tics").

Note

Liquids according to Article 3 are those liquids whose steam pressure is not more than 0.5 bar above standard atmospheric pressure (1013 mbar) at the maximum permissible temperature.

The maximum permissible temperature for the used liquids is the maximum process temperature which can occur, as defined by the user. This must be within the limits defined for the equipment.

Division of media (liquid/gaseous) into the fluid groups

Fluids are divided according to Article 9 into the following fluid groups:

Conformity rating

Pressure equipment of categories I to IV must comply with the safety requirements of the directive and be assigned the CE symbol.

They must comply with a conformity rating procedure according to Appendix III of the directive.

Pressure equipment according to Article 3 Paragraph 3 must be designed and manufactured in agreement with the sound engi-neering practice SEP applying in a member country and must not be assigned a CE symbol (CE symbols from other directives are not affected).

The manufacturer issues a declaration of conformity if the orifice plates are produced for use in the area covered by the PED and are assignable to the categories I, II, III or IV.

Following information is mandatory:• PS (maximum permissible pressure (not PN)) of the plant• TS (maximum permissible temperature (not operating temper-

ature)) of the plant• DN• Fluid

Notes

Equipment designed for media with a high danger potential (e.g. gases of fluid group 1) may also be used for media with a lower danger potential (e.g. gases of fluid group 2 or liquids of fluid groups 1 and 2).

The pressure equipment directive according to Article 1 Paragraph 3 does not apply to equipment such as: mobile off-shore plants, ships, aircraft, water supply and waste water net-works, nuclear plants, rockets and pipelines outside industrial plants.

Fluid group Group 1 or 2

Aggregate state Liquid or gaseous

Type of pressurized equipment

• Pipeline Nominal diameter, pressure or product of pressure and nominal diameter (PS * DN)

Group 1

Potentially explosive R phrases: e.g.: 2, 3 (1, 4, 5, 6, 9, 16, 18, 19, 44)

Highly toxic R phrases: e.g.: 26, 27, 28, 39 (32)

Highly combus-tible R phrases: e.g.: 12 (17)

Toxic R phrases: e.g.: 23, 24, 25 (29, 31)

Readily flamma-ble R phrases: e.g.: 11, 15, 17 (10, 30)

Fire stimulating R phrases: e.g.: 7, 8, 9 (14, 15, 19)

Flammable if the maximum permissible temperature is above the flash point.

Group 2

All fluids not belonging to Group 1.Also applies to fluids which are e.g. dangerous to the environment, cor-rosive, dangerous to health, irritant or carcinogenic (if not highly toxic).


Pressure equipment directive 97/23/EC

4/263Siemens FI 01 · 2006

4

■ Characteristic curves

Gases of fluid group 1

Pipelines according to Article 3 Number 1.3 Letter a) First dash

Exception: Unstable gases belonging to Categories I and II must be included in Category III.

Gases of fluid group 2

Pipelines according to Article 3 Number 1.3 Letter a) Second dash

Exception: Liquids at temperatures > 350 °C belonging to Cate-gory II must be included in Category III.

Liquids of fluid group 1

Pipelines according to Article 3 Number 1.3 Letter b) First dash

Liquids of fluid group 2

Pipelines according to Article 3 Number 1.3 Letter b) Second dash

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4/264 Siemens FI 01 · 2006

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Tag (e.g. measuring-point number): __ __ __ __ __ __ __ __ __ __ __ __ _

Company: __ __ __ __ __ __ __ __ __ __ __ __ _____________________________________________________________________________________________________________________

Measured medium: _ __ __ __ __ __ __ __ __ __ __ __ __ __ __ __ __ __ __ __ __ __ __ __ __ __ __ __ __ __ __ __ __ __

Design fluid acc. to PED Group 1 Group 2

Design pressure (PS): __ __ __ _ bar psi; Design temperature (TS): __ __ __ __ __ °C °F

Only for liquids: steam pressure ____________ bar psi at TS

When manufacturing without the pressure equipment directive, it is essential to specify the reason:

Use outside the scope of the pressure equipment directive

Customer with users’ testing agency____________________________________________________________________________________________________________________

LiquidVapor ⇒ overheated; saturated ρ1; saturated t1; steamGas ⇒ dry moist____________________________________________________________________________________________________________________

Absolute pressure p1: ___________________ bar psi Design pressure (PS):________________ bar psi(gauge pressure on upstream side plus atmospheric pressure at location)

Operating temperature t1: _____________ °C °F Design temperature (TS): ____________ °C °F

Density: _____________ kg/m3 ....... standard cond. operating cond.

Dynamic viscosity: _____________ Pa · s cp____________________________________________________________________________________________________________________

Boiling pressure (p1) : ______________________________ bar psiBoiling temperature (t1) :______________________________ °C °FIsentropic exponent (only for gas and vapor): _________________________________________________________________________________________________________________________________

Specific gas constant Zn: _____________ Z1: _____________ (without data: Zn,1 = 1)

Relative humidity: ϕ _____________ %____________________________________________________________________________________________________________________

Material of primary device: __________________________________ Material no.: _ _ _ _ _ _ _ _ _ _ _ _Material of pipeline: __________________________________ Material no.: _ _ _ _ _ _ _ _ _ _ _ _Pipe roughness: __________________________________ mm InchInternal pipe diameter: __________________________________ mm Inch____________________________________________________________________________________________________________________

Primary device: Kind of tapping/kind of deviceOrifice ⇒ Corner tap D, D/2 tap Flange tap Segmental dev.Nozzle ⇒ ISA 1932 Long radius Quarter circle VenturiVenturi tube ⇒ Raw cast Machined Sheet weldedother ⇒ ____________________________________ C: ___________ ; ε:_______________________________________________________________________________________________________________________________

Calculation of: "d"; diff. pressure; flow

Design: 2/3 max. flow; max. flow____________________________________________________________________________________________________________________Max. flow: ________________________ qm kg/h ......... (mass flow for all media)

qv m3/h ......... (volume flow for liquids and gases)qn m3/h ......... (volume flow for gases at standard cond.)____________________________________________________________________________________________________________________

Differential pressure: ________________________ mbar ........

Orifice hole "d": _______________________ mm Inch

Max. permanent pressure loss: __________________ mbar ........____________________________________________________________________________________________________________________

Uncertainties to be allowed for calculation in % (without data: 0 %)Operating temp. _____________; abs. pressure _____________; diff. pressure_____________;operating density _____________; additional uncer. _________________________________________________________________________________________________________________________________

For clarification of any questions:

Name: ________________________________ ☎ ________________________________ Fax: ________________________________

Note: The delivery time will be delayed if the data are incomplete.

Questionnaire for calculation of a primary differential pressure device to DIN EN ISO 5167-1

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4/265Siemens FI 01 · 2006

4

Article 3 - technical requirement

Conformity evaluation procedure: data can only be provided by owner

The possible conformity evaluation procedures are determined from article 3 in association with appendix (see „Pressure equipment directive 97/23/EC) depending on:

• Maximum permissible pressure (not PN) PS _ __ __ __ __ __ __ __ __ __ __ _ bar psi

• Nominal diameter DN _ __ __ __ __ __ __ __ __ __ __ _ [-]

• Fluid (batch material) __ __ __ __ __ __ __ __ __ __ __ __ _ Name

- At the maximum permissible temperature TS _ __ __ __ __ __ __ __ __ __ __ _ °C °F

• Additionally for liquids:

- Dependent on steam pressure __ __ __ __ __ __ __ __ __ __ __ __ _ bar psi

The fluids are divided into 2 groups:

• Dangerous fluids - Explosive Group 1 - Slightly or highly combustible- Fire stimulating- Toxic, very toxic

• All others Group 2

Liquids with a steam pressure of more than 0.5 bar (7.25 psi) above normal atmospheric pressure are handled like gases.

Appendix II of the PED contains 4 diagrams with which the associated category of the primary differential pressure devices can be determined.

Article 3, paragraph 3 Without > "Sound engineering practice"

Category I With > Manufacturer

Category II With > and No. of named point

Category III With > and No. of named point

Pressure equipment with a > marking must have a conformity declaration from the manufacturer.

Questionnaire for manufacture according to the pressureequipment directive (PED) 97/23/EC

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4/266 Siemens FI 01 · 2006

4

■ Application

Suitable for non-corrosive and corrosive gases, vapors and liq-uids; permissible operating temperature -60 to +550 °C.

■ Design

• Two support rings with replaceable orifice disk form A, B or D (see types of primary differential pressure devices in "Techni-cal description", "Function"); see Ordering data for materials.

• Graphite gasket with foil insert between support rings and or-ifice disks.

Overall length

65 mm to DIN 19205

Nominal diameters

DN 50 to DN 1000

Nominal pressure

PN 6 to PN 100

Sealing face to the mating flanges• Plane, sealing face turned, N10/N12 to DIN ISO 1302, for soft

gasket (PN 6 to PN 40)• Plane, sealing face turned, N8 to DIN ISO 1302, for grooved

gasket to DIN 2697 (PN 63 to PN 100)

Tapping sockets straight or bent• With pipe thread G½ DIN ISO 228/1, connection dimensions

to DIN 19207 form V, see "Dimension drawings" or• with welding connection Ø 21.3 mm.

See "Technical description", "Function" for position of the tapping sockets.

■ Dimensional drawings

Orifice plate with annular chamber (left); tapping socket with threaded connection, dimensions in mm

Tapping socket: Socket length is fixed in accordance with the pressure and nominal diameter (DIN 19 205, Part 2).

Versions for steam lines: See "Technical description", "Function" for position of the tapping sockets.



4/267Siemens FI 01 · 2006

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Orifice plates with annular chambers for use with EN flanges, dimensions in mm and weights

Orifice plates with annular chambers for use with EN flanges, dimensions in mm and weights (continued)

DN Int. diameter External diameter d4 / sealing face: Plane

PN 6 PN 10 PN 16 PN 25 PN 40 PN 63 PN 100

50 43 ... 55 96 107 107 107 107 113 119

65 59 ... 71 116 127 127 127 127 138 144

80 73 ... 85 132 142 142 142 142 148 154

100 90 ... 108 152 162 162 168 168 174 180

125 114 ... 132 182 192 192 194 194 210 217

150 142 ... 160 20 218 218 224 224 247 257

200 185 ... 211 262 273 273 284 290 309 324

250 237 ... 262 317 328 329 340 352 364 391

300 285 ... 314 373 378 384 400 417 424 458

350 328 ... 362 423 438 444 457 474 486 512

400 380 ... 408 473 489 495 514 546 543 –

500 477 ... 514 578 594 617 624 628 – –

600 581 ... 610 679 695 734 731 – – –

700 686 ... 710 784 810 804 833 – – –

800 776 ... 810 890 917 911 942 – – –

900 876 ... 910 990 1017 1011 1042 – – –

1000 976 ... 1010 1090 1124 1128 1154 – – –

DN b E Weight (approx. in kg)

PN 6 PN 10 ... PN 25 PN 40 PN 63 ... PN 100 PN 6 ... PN 100 With smallest nominal pressure

With largest nominal pressure

50 79 79 79 79 2±0.1 2.5 4.5

65 96 96 96 96 2±0.1 3.4 6.4

80 115 115 115 115 4±0.2 4.3 6.9

100 137 137 137 137 4±0.2 4.7 8.6

125 164 164 164 164 4±0.2 6.3 12.4

150 193 193 193 193 4±0.2 7.0 17.0

200 247 247 247 247 4±0.2 10.3 26.2

250 302 302 302 302 4±0.2 13.1 36.6

300 354 354 354 354 4±0.2 17.3 49.0

350 403 403 403 403 4±0.2 25.0 63.0

400 452 452 452 452 4±0.2 28.0 73.8

500 553 553 553 – 6±0.2 36.2 65.9

600 659 659 – – 6±0.2 42.5 75.6

700 757 757 – – 8±0.2 51.8 89.5

800 869 869 – – 8±0.2 61.7 109

900 969 969 – – 8±0.2 68.3 123

1000 1071 1071 – – 10±0.2 74.0 148

SITRANS F flowmetersSITRANS F O delta p primary differential pressure devices


4/268 Siemens FI 01 · 2006

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Selection and ordering data Order No.

Orifice plate with annular chambers 7 M E 1 1 1 0 —77777—7777— Z

for mounting between flangesSealing faces to the mating flanges: plane.

Nominal diameter DN 50• PN 6 1 G A• PN 10 ... PN 40 1 G E• PN 63 1 G F• PN 100 1 G G

Nominal diameter DN 65• PN 6 1 H A• PN 10 ... PN 40 1 H E• PN 63 1 H F• PN 100 1 H G

Nominal diameter DN 80• PN 6 1 J A• PN 10 ... PN 40 1 J E• PN 63 1 J F• PN 100 1 J G

Nominal diameter DN 100• PN 6 2 A A• PN 10 and PN 16 2 A C• PN 25 and PN 40 2 A E• PN 63 2 A F• PN 100 2 A G

Nominal diameter DN 125• PN 6 2 B A• PN 10 and PN 16 2 B C• PN 25 and PN 40 2 B E• PN 63 2 B F• PN 100 2 B G

Nominal diameter DN 150• PN 6 2 C A• PN 10 and PN 16 2 C C• PN 25 and PN 40 2 C E• PN 63 2 C F• PN 100 2 C G

Nominal diameter DN 200• PN 6 2 E A• PN 10 and PN 16 2 E C• PN 25 2 E D• PN 40 2 E E• PN 63 2 E F• PN 100 2 E G

Nominal diameter DN 250• PN 6 2 F A• PN 10 2 F B• PN 16 2 F C• PN 25 2 F D• PN 40 2 F E• PN 63 2 F F• PN 100 2 F G

Nominal diameter DN 300• PN 6 2 G A• PN 10 2 G B• PN 16 2 G C• PN 25 2 G D• PN 40 2 G E• PN 63 2 G F• PN 100 2 G G

Nominal diameter DN 350• PN 6 2 H A• PN 10 2 H B• PN 16 2 H C• PN 25 2 H D

• PN 40 2 H E• PN 63 2 H F• PN 100 2 H G

Nominal diameter DN 400• PN 6 2 J A• PN 10 2 J B• PN 16 2 J C• PN 25 2 J D• PN 40 2 J E• PN 63 2 J F

Nominal diameter DN 500• PN 6 2 K A• PN 10 2 K B• PN 16 2 K C• PN 25 2 K D• PN 40 2 K E

Nominal diameter DN 600• PN 6 3 A A• PN 10 3 A B• PN 16 3 A C• PN 25 3 A D

Nominal diameter DN 700• PN 6 3 B A• PN 10 3 B B• PN 16 3 B C• PN 25 3 B D

Nominal diameter DN 800• PN 6 3 C A• PN 10 3 C B• PN 16 3 C C• PN 25 3 C D

Nominal diameter DN 900• PN 6 3 D A• PN 10 3 D B• PN 16 3 D C• PN 25 3 D D

Nominal diameter DN 1000• PN 6 3 E A• PN 10 3 E B• PN 16 3 E C• PN 25 3 E D

For non-corrosive media• Support rings made of P250GH,

mat. No. 1.0460 or P265GH, mat. No. 1.0425tapping socket made of P235G1TH, material No. 1.0305;orifice disk made of X 6 CrNiM-oTi 17-12-2, material No. 1.4571;permissible operating temp.–10 to +400 °C

1 2

For corrosive media• Support rings, tapping socket

and orifice disk made of X 6 CrNiMoTi 17-12-2, material No. 1.4571; permissible operat-ing temp. –60 to +550 °C

1 4

Tapping sockets• with threaded connection G½;

for liquids and gases PN 160, for steam PN 100- Opposite one another, straight 1 A- Opposite one another, bent-up,

for vertical pipes1 B

- Arranged on one side, for hori-zontal pipes

1 C





4/269Siemens FI 01 · 2006

4

1) Order codes additive, any sequence.

2) Only possible outside Europe (manufacturing is carried out acc. to Article 3, Paragraph 3 of the pressure equipment guideline, without CE identification).

Note on orderingEnclose a filled-in calculation sheet "Questionnaire for calcula-tion of a primary differential pressure device according to DIN EN ISO 5167 with the order (necessary for device selection)!

Scope of deliveryTwo support rings with tapping sockets, one orifice disk, one gasket between orifice disk and support ring.Graphite flat gasket with foil insert (1.4401, 0.1 mm). Application for liquids, steam, gases, liquidgases, acids, hydrocarbons, oils and oil products.

AccessoriesSee "SITRANS P measuring instruments for pressure".

• with welding connection ∅ 21.3 mm; for liquids and gases PN 100 to PN 400,for steam PN 100- Opposite one another, straight 1 D- Opposite one another, bent-up,

for vertical pipes1 E

- Arranged on one side, for hori-zontal pipes

1 F

Shape of orifice disk aperture(see figure "Shapes of orifice disk aperture") • for flow in one direction

- Orifice plate form A A- Quarter-circle nozzle form B B

• for flow in both directions- Cylindrical orifice plate form D D

Manufacture according topressure equipment directive(see "Questionnaire for manufacture according to the pressure equip-ment directive (PED) 97/23/EC") • without ²) 0• according to Article 3, Paragraph 3 1• according to category 1 2• according to category 2 3• according to category 3 4

Further designs Order code 1)

Please add "-Z" to Order No. and specify Order code(s) and plain text.

Calculation of orifice disk apertureEnclose a calculation sheet "Questionnaire for calculation of a primary differential pressure device according to DIN EN ISO 5167 with the order!

A11

Orifice plate without calculationSpecify in plain text:Diameter of orifice disk apertured = ... mmInternal diameter of pipeD = ... mmRadius of quarter-circle nozzlerr = ... mm

Y01

Orifice plate degreasedfor oxygen measurementsNote: Cleaned and foil-packed. When using, note that the orifice plate must be completely degreased when fitted in the pipe.

A12

Orifice disk including gasket On request

Version to ASME(20% extra charge)

Other materials on request

Acceptance test certificate B to EN 10 204, cold water pressure test at 1.5 × PN (extra charge)

Flushing rings (25% extra charge)

Support rings made of 1.7335 (20% extra charge)

Sealing face of orifice plate with recess or groove(5% extra charge)





4/270 Siemens FI 01 · 2006

4

■ Application


■ Design

One-piece orifice plate, orifice disk form A, B or D (see types of primary differential pressure devices in "Technical description", "Function"); see Ordering data for materials.

Overall length

40 mm to DIN 19205

Nominal diameters

DN 50 to DN 500

Nominal pressure

PN 6 to PN 315

Sealing face to the mating flanges• Plane, sealing face turned, N10/N12 to DIN ISO 1302, for soft



Straight tapping sockets• With pipe thread G½ DIN ISO 228/1, connection dimensions

to DIN 19 207 form V (see "Annular chamber orifice plate", "Di-mension drawings") or

• Welding connection, Ø 21.3 mm or Ø 24 mm

Connection size

The connection size depends on the operating pressure, the temperature of the medium (DIN 19 207 and 19 211) and the me-dium, e.g.• For liquids and gases

- PN 6 to PN 160: Thread G½, welding connection Ø 21.3 mm- PN 250 and PN 315: Welding connection Ø 21.3 mm

• For steam - PN 6 to PN 100: Thread G½, welding connection Ø 21.3 mm- PN 160 to PN 315: Welding connection Ø 24 mm



Tapping socket: Socket length is fixed in accordance with the pressure and nominal diameter (DIN 19 205, Part 2).

Versions for steam lines: See "Technical description", "Function" for position of the tapping sockets.

Orifice plates with single tappings for use with EN flanges, dimensions in mm, weights in kg

DN Internal diameter

External diameter d4 / sealing face: Plane Weight (approx. in kg)

PN 6 PN 10 PN 16 PN 25 PN 40 PN 63 PN 100 PN 160 PN 250 PN 315 With smallest nominal pressure

With largest nomi-nal pressure

50 45 ... 55 96 107 107 107 107 113 119 119 124 134 1.6 4.0

65 61 ... 71 116 127 127 127 127 138 144 144 154 170 2.2 6.3

80 77 ... 85 132 142 142 142 142 148 154 154 170 190 2.9 7.8

100 94 ... 108 152 162 162 168 168 174 180 180 202 229 3.2 11.5

125 117 ... 132 182 192 192 194 194 210 217 217 242 274 4.3 15.9

150 144 ... 160 207 218 218 224 224 247 257 257 284 311 4.7 20.6

200 188 ... 211 262 273 273 284 290 309 324 324 358 398 7.0 33.7

250 240 ... 262 317 328 329 340 352 364 391 388 442 488 9.0 50.6

300 292 ... 314 373 378 384 400 417 424 458 458 538 – 12.3 37.3

350 331 ... 362 423 438 444 457 474 486 512 – – – 17.7 44.6

400 383 ... 408 473 489 495 514 546 543 – – – – 19.8 43.1

500 480 ... 514 578 594 617 624 628 – – – – – 25.6 46.6



4/271Siemens FI 01 · 2006

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Orifice plate with single tappings 7 M E 1 1 2 0 —77777—7777— Z

for mounting between flangesSealing faces to the mating flanges: plane.Nominal diameter DN 50• PN 6 1 G A• PN 10 ... PN 40 1 G E• PN 63 1 G F• PN 100 and PN 160 1 G H• PN 250 1 G J• PN 315 1 G K

Nominal diameter DN 65• PN 6 1 H A• PN 10 ... PN 40 1 H E• PN 63 1 H F• PN 100 and PN 160 1 H H• PN 250 1 H J• PN 315 1 H K

Nominal diameter DN 80• PN 6 1 J A• PN 10 ... PN 40 1 J E• PN 63 1 J F• PN 100 and PN 160 1 J H• PN 250 1 J J• PN 315 1 J K

Nominal diameter DN 100• PN 6 2 A A• PN 10 and PN 16 2 A C• PN 25 and PN 40 2 A E• PN 63 2 A F• PN 100 and PN 160 2 A H• PN 250 2 A J• PN 315 2 A K

Nominal diameter DN 125• PN 6 2 B A• PN 10 and PN 16 2 B C• PN 25 and PN 40 2 B E• PN 63 2 B F• PN 100 and PN 160 2 B H• PN 250 2 B J• PN 315 2 B K

Nominal diameter DN 150• PN 6 2 C A• PN 10 and PN 16 2 C C• PN 25 and PN 40 2 C E• PN 63 2 C F• PN 100 and PN 160 2 C H• PN 250 2 C J• PN 315 2 C K

Nominal diameter DN 200• PN 6 2 E A• PN 10 and PN 16 2 E C• PN 25 2 E D• PN 40 2 E E• PN 63 2 E F• PN 100 and PN 160 2 E H• PN 250 2 E J• PN 315 2 E K

Nominal diameter DN 250• PN 6 2 F A• PN 10 and PN 16 2 F C• PN 25 2 F D• PN 40 2 F E• PN 63 2 F F• PN 100 and PN 160 2 F H• PN 250 2 F J• PN 315 2 F K

Nominal diameter DN 300• PN 6 2 G A• PN 10 2 G B• PN 16 2 G C• PN 25 2 G D• PN 40 2 G E• PN 63 2 G F• PN 100 and PN 160 2 G H

Nominal diameter DN 350• PN 6 2 H A• PN 10 2 H B• PN 16 2 H C• PN 25 2 H D• PN 40 2 H E• PN 63 2 H F• PN 100 2 H G

Nominal diameter DN 400• PN 6 2 J A• PN 10 2 J B• PN 16 2 J C• PN 25 2 J D• PN 40 2 J E• PN 63 2 J F

Nominal diameter DN 500• PN 6 2 K A• PN 10 2 K B• PN 16 2 K C• PN 25 2 K D• PN 40 2 K E

For non-corrosive media• Orifice plate and tapping socket

made of 13 CrMo 4-5, material No. 1.7335; metering edge with X 5 CrNiMoNb 19 12, material No.1.4576, welded as ordered;permissible operating temp.–10 to +570 °C

2 4

For corrosive media• Orifice plate and tapping sockets

made of X 6 CrNiMoTi 17-12-2,material No. 1.4571;permissible operating temp.–200 to +550 °C

2 2





4/272 Siemens FI 01 · 2006

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Scope of delivery:One-part orifice plate with tapping sockets

Accessories:See "SITRANS P measuring instruments for pressure".

Tapping sockets• with threaded connection G½;

for liquids and gases PN 160, for steam PN 100- Opposite one another, straight 1 A- Opposite one another, bent-up,

for vertical pipes1 B

- Any arrangement of tapping sockets (specify angle in plain text)

1 G

• with welding connection ∅ 21.3 mm; for liquids and gases PN 100 to PN 400, for steam PN 100 or ∅ 24 mm; for liquids and gases over PN 400, for steam over PN 100- Opposite one another, straight 1 D- Opposite one another, bent-up,

for vertical pipes1 E

- Any arrangement of tapping sockets (specify angle in plain text)

1 H

Shape of orifice disk aperture(see figure "Shapes of orifice disk aperture") • for flow in one direction

- Orifice plate form A A- Quarter-circle nozzle form B B

• for flow in both directions- Cylindrical orifice plate form D D

Manufacture according topressure equipment directive(see "Questionnaire for manufacture according to the pressure equip-ment directive (PED) 97/23/EC") • without ²) 0• according to Article 3,

Paragraph 31

• according to category 1 2• according to category 2 3• according to category 3 4



Calculation of orifice disk apertureAdd calculation sheet "Question-naire for calculation of a primary differential pressure deviceto DIN EN ISO 5167-1 to the order!

A11


Y01

Orifice plate degreasedfor oxygen measurementsNote: Cleaned and foil-packed.When using, note that the orifice plate must be completely degreased when fitted in the pipe.

A12

Angle between tapping sockets (specify in plain text)

Y02

Version to ASME(20% extra charge)




Overall length 65 mm(required for tapping sockets arranged on one side) (20% extra charge)


Flushing rings (25% extra charge)

Support ring made of 1.7225 (20% extra charge)

Sealing face of orifice plate with recess or groove(5% extra charge)

Orifice plate made of other materials (on request)




Metering pipe with annular chamber orifice

4/273Siemens FI 01 · 2006

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■ Application


■ Design

Orifice plate with annular chambers consisting of two support rings with replaceable orifice disk form A or B (see types of pri-mary differential pressure devices in "Technical description", "Function"); flanged between inlet and outlet pipe sections with lengths according to DIN 19 205.Nominal diameters• DN 10 to DN 50Nominal pressure• PN 10 to PN 100

Sealing face of the end flanges• Plane, sealing face turned, N10/N12 to DIN ISO 1302, for soft


gasket to DIN 2697 (PN 63 to PN 100)Straight tapping sockets• With pipe thread G½ DIN ISO 228/1, connection dimensions

to DIN 19 207 form VSee "Technical description", "Function" for position of the tapping sockets. Tapping socket length for all metering pipes l = 120 mm.Design for flow in both directions (orifice disk aperture form D), special lengths on request.End flanges to ASME on request.



Metering pipes for mounting between EN flanges, orifice plates with annular chambers flanged; dimensions in mm and weights1) Flange standard replaced by EN 1092-1

Permissible operating temperature –10 to +400 °C

Pipes and tapping sockets made of P235G1TH, material No. 1.0305 ST37.4, material No. 1.0255 or P235GH, material No. 1.0345

Flanges made of P250GH, material No. 1.0460

Support rings made of P250GH, material No. 1.0460/1.4571

Orifice disk made of X 6 CrNiMoTi 17 12-2, material No. 1.4571

DN PN a b k End flange F 1) Pipe Da x s Weight Approx. kg10 10 and 16

25 and 4063 and 100

400 218 320320295

DIN 2633DIN 2635DIN 2637

16 x 3 4.556.5

15 10 and 1625 and 4063 and 100

550 368 325325300

DIN 2633DIN 2635DIN 2637

20 x 2.5 55.57.5

20 10 and 1625 and 40

700 488 335 DIN 2633DIN 2635

25 x 2.5 6.57

25 10 and 1625 and 4063 and 100

900 638 310 DIN 2633DIN 2635DIN 2637

30 x 2.5 8914

32 10 and 1625 and 40

1100 788 320 DIN 2633DIN 2635

38 x 3 11.512.5

40 10 and 1625 and 4063 and 100

1300 988 330330335

DIN 2633DIN 2635DIN 2637

50 x 5 131525

50 10 and 1625 and 4063100

1500 1188 340340345345

DIN 2633DIN 2635DIN 2636DIN 2637

60 x 5 20223434


Metering pipe with annular chamber orifice

4/274 Siemens FI 01 · 2006

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Scope of delivery:Orifice plate comprised of two support rings with tapping sockets and an orifice disk; flanged between inlet and outlet pipes, with gaskets between orifice plate and support ring and between support rings and flanges of the inlet and outlet pipes, including bolts and nuts.Graphite flat gasket with foil insert (1.4401, 0.1 mm). application for liquids, steam, gases, liquid gases, acids, hydrocarbons, oils and oil products.

Accessories: See "SITRANS P measuring instruments for pressure".


Metering pipe for mountingbetween flangesfor non-corrosive media

7 M E 1 3 1 0 —77777—7777— Z

Orifice plate with annular cham-bers mounted between flangesSealing faces to the mating flanges: plane (with recess or with groove on request).Nominal diameter DN 10• PN 10 and PN 16 1 A C 3 2• PN 25 and PN 40 1 A E 3 2• PN 63 1 A F 3 2• PN 100 1 A G 3 2

Nominal diameter DN 15• PN 10 and PN 16 1 B C 3 2• PN 25 and PN 40 1 B E 3 2• PN 63 1 B F 3 2• PN 100 1 B G 3 2

Nominal diameter DN 20• PN 10 and PN 16 1 C C 3 2• PN 25 and PN 40 1 C E 3 2

Nominal diameter DN 25• PN 10 and PN 16 1 D C 3 2• PN 25 and PN 40 1 D E 3 2• PN 63 1 D F 3 2• PN 100 1 D G 3 2

Nominal diameter DN 32• PN 10 and PN 16 1 E C 3 2• PN 25 and PN 40 1 E E 3 2

Nominal diameter DN 40• PN 10 and PN 16 1 F C 3 2• PN 25 and PN 40 1 F E 3 2• PN 63 1 F F 3 2• PN 100 1 F G 3 2

Nominal diameter DN 50• PN 10 and PN 16 1 G C 3 2• PN 25 and PN 40 1 G E 3 2• PN 63 1 G F 3 2• PN 100 1 G G 3 2

Shape of orifice disk aperture(see figure "Shapes of orifice disk aperture")• Orifice plate form A 1 A A• Quarter-circle nozzle form B 1 A B

Manufacture according topressure equipment directive(see "Questionnaire for manufacture according to the pressure equip-ment directive (PED) 97/23/EC")• without ²) 0• according to Article 3, Paragraph 3 1• according to category 1 2• according to category 2 3



Calculation of orifice disk apertureAdd calculation sheet "Question-naire for calculation of a primary differential pressure deviceto DIN EN ISO 5167-1 to the order!

A11


Y01

Outer flange version acc. to ASME (10% extra charge); for all flanges acc. to ASME (20% extra charge)



Metering pipes for corrosive media (on request)



7 M E 1 3 1 0 —77777—7777— Z


Metering pipe with orifice platewith single tappings

4/275Siemens FI 01 · 2006

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■ Application

Suitable for non-corrosive and corrosive gases, vapors and liquids; permissible operating temperature -10 to +400 °C

■ Design

Orifice plate with single tappings, orifice disk aperture form A or B (see types of primary differential pressure devices in "Techni-cal description"); flanged between standard inlet and outlet pipe sections with lengths according to DIN 19 205.

Nominal diameters• DN 10 to DN 50

Nominal pressure• PN 10 to PN 160

Sealing face of the end flanges• Plane, sealing face turned, N10/N12 to DIN ISO 1302, for soft



Straight tapping sockets• 120 mm long

- With pipe thread G½ DIN ISO 228/1, connection dimensions to DIN 19 207 form V or

- with welded connection


Connection size

The connection size depends on the operating pressure, the temperature of the medium (DIN 19 207 and 19 211) and the me-dium, e.g.• For liquids and gases,

- PN 10 to PN 160: Thread G½; welding connection Ø 21.3 mm

• For steam - PN 10 to PN 100: Thread G½; welding connection

Ø 21.3 mm- PN 160: Welding connection Ø 24 mm

Design for flow in both directions (orifice disk aperture form D), special lengths on request.End flanges to ASME on request.


Permissible operating temperature –10 to +400 °C

Pipes and tapping sockets made of P235G1TH, material No. 1.0305, ST37.4, material No. 1.0255 or P235GH, material No. 1.0345

Flanges made of P250GH, material No. 1.0460

Support ring made of P250GH, material No. 1.0460/1.4571

Orifice plate made of X 6 CrNiMoTi 17 12-2, material No. 1.4571

SITRANS F flowmetersSITRANS F O delta p primary differential pressure devicesMetering pipe with orifice platewith single tappings

4/276 Siemens FI 01 · 2006

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Metering pipes for mounting between EN flanges, orifice plates with single tappings flanged; dimensions in mm and weights1) Flange standard replaced by EN 1092-1

DN PN a b k End flange F 1) PipeDa x s

WeightApprox. kg

10 10 and 1625 and 4063 and 100160

400 229229229230

322322295335

DIN 2633DIN 2635DIN 2637DIN 2638

16 x 3 4.556.56.5

15 10 and 1625 and 4063 and 100160

550 379379379380

325325300340

DIN 2633DIN 2635DIN 2637DIN 2638

20 x 2.5 55.57.57.5

20 10 and 1625 and 40

700 499 300 DIN 2633DIN 2535

25 x 2.5 6.57

25 10 and 1625 and 4063 and 100160

900 649649649650

310310310350

DIN 2633DIN 2635DIN 2637DIN 2638

30 x 2.5 891414

32 10 and 1625 and 40

1100 799 310 DIN 2633DIN 2535

38 x 3 11.512.5

40 10 and 1625 and 4063 and 100160

1300 9999999991000

320320320372

DIN 2633DIN 2635DIN 2637DIN 2638

50 x 5 13152522.5

50 10 and 1625 and 4063100160

1500 11991199119911991200

332332332332380

DIN 2633DIN 2635DIN 2636DIN 2637DIN 2638

60 x 5 2022343435


Metering pipe with orifice platewith single tappings

4/277Siemens FI 01 · 2006

4




Scope of delivery:One-piece orifice plate with tapping sockets flanged between inlet and outlet pipes, with gaskets between orifice plate and flanges of the inlet and outlet pipes, including bolts and nuts.Graphite flat gasket with foil insert (1.4401, 0.1 mm). application for liquids, steam, gases, liquid gases, acids, hydrocarbons, oils and oil products.

Accessories: See "SITRANS P measuring instruments for pressure".



7 M E 1 3 2 0 —77777—7777— Z

Orifice plate with single tappings,flangedSealing faces to the mating flanges: plane (with recess or with groove on request).Tapping socket:Tapping sockets opposite one another w180°; specify other angles in plain text.Nominal diameter DN 10threaded connection• PN 10 and PN 16 1 A C 3 5 1 A• PN 25 and PN 40 1 A E 3 5 1 A• PN 63 1 A F 3 5 1 A• PN 100 1 A G 3 5 1 A• PN 160 1 A H 3 5 1 Awelded connection• PN 160 1 A H 3 5 1 D

Nominal diameter DN 15threaded connection• PN 10 and PN 16 1 B C 3 5 1 A• PN 25 and PN 40 1 B E 3 5 1 A• PN 63 1 B F 3 5 1 A• PN 100 1 B G 3 5 1 A• PN 160 1 B H 3 5 1 Awelded connection• PN 160 1 B H 3 5 1 D

Nominal diameter DN 20threaded connection• PN 10 and PN 16 1 C C 3 5 1 A• PN 25 and PN 40 1 C E 3 5 1 A

Nominal diameter DN 25threaded connection• PN 10 and PN 16 1 D C 3 5 1 A• PN 25 and PN 40 1 D E 3 5 1 A• PN 63 1 D F 3 5 1 A• PN 100 1 D G 3 5 1 A• PN 160 1 D H 3 5 1 Awelded connection• PN 160 1 D H 3 5 1 D

Nominal diameter DN 32threaded connection• PN 10 and PN 16 1 E C 3 5 1 A• PN 25 and PN 40 1 E E 3 5 1 A

Nominal diameter DN 40threaded connection• PN 10 and PN 16 1 F C 3 5 1 A• PN 25 and PN 40 1 F E 3 5 1 A• PN 63 1 F F 3 5 1 A• PN 100 1 F G 3 5 1 A• PN 160 1 F H 3 5 1 Awelded connection• PN 160 1 F H 3 5 1 D

Nominal diameter DN 50threaded connection• PN 10 and PN 16 1 G C 3 5 1 A• PN 25 and PN 40 1 G E 3 5 1 A• PN 63 1 G F 3 5 1 A• PN 100 1 G G 3 5 1 A• PN 160 1 G H 3 5 1 Awelded connection• PN 160 1 G H 3 5 1 D

Shape of orifice disk aperture(see figure "Shapes of orifice disk aperture") • Orifice plate form A A• Quarter-circle nozzle form B B

Manufacture according topressure equipment directive(see "Questionnaire for manufacture according to the pressure equip-ment directive (PED) 97/23/EC")• without ²) 0• according to Article 3, Paragraph 3 1• according to category 1 2• according to category 2 3



Calculation of orifice disk apertureEnclose a calculation sheet "Ques-tionnaire for calculation of a primary differential pressure device accord-ing to DIN EN ISO 5167 with the order!

A11


Y01

Tapping sockets not opposite one other; angle to DIN 19 205Specify in plain text: Angle between the tapping sockets ...°

External flange design to ASME(10% extra charge)with all external flanges to ASME (20% extra charge)



Metering pipes for corrosive media (on request)



7 M E 1 3 2 0 —77777—7777— Z

SITRANS F flowmetersSITRANS F O delta p primary differential pressure devicesCalculation of primary differential pressure devices

4/278 Siemens FI 01 · 2006

4

■ Overview

When ordering a primary differential pressure device, the calcu-lation can be ordered at the same time.

Add the Order code "A11" to the Order No. of the primary device, and enclose a filled-in calculation sheet ("Questionnaire for cal-culation of a primary differential pressure device according to DIN EN ISO 5167) with the order.

If the calculation sheet is not filled in completely, an extra charge will be made for the additionally required calculations.


Calculation of orifice disk aperture

7ME1910–0A–Z

of an orifice plate, orifice plate without support rings, ISA 1932 nozzle or Venturi nozzle(without measuring sheet or sketch)

Calculation of differential pressure or flow

7ME1910–0D–Z

on an existing primary device

Further designs Order codePlease add "-Z" to Order No. and specify Order code(s) and plain text.

Enclose a calculation sheet "Ques-tionnaire for calculation of a primary differential pressure device accord-ing to DIN EN ISO 5167 with the order!

Y01

Documents

SITRANS F flowmeters SITRANS F O...DIN EN ISO 5176 and the VDI guidelines 2040. The bypass meter contains a conical glass tube (3) with float (4). The water flows vertically upwards