Universal Excess Pressure Valve

8/13/2019 Universal Excess Pressure Valve

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Self-operated Pressure Regulators

Universal Excess Pressure Valve Type 41-73

ApplicationPressure regulator for set points from 0.05 to 28 bar Valves insizes DN 15 to 100 Nominal pressure PN 16 to 40 Suitablefor liquids, gases and steam up to 350 C

Special features

Low-maintenance proportional regulators requiring no aux-iliary energy

Frictionless plug stem seal with stainless steel bellows

Control line kit for pressure tapping directly at the body (ac-cessories)

Wide set point range and convenient set point adjustment ona nut

Exchangeable actuator and positioning springs Spring-loaded, single-seated valve with upstream and

downstream pressure balancing 1) by a stainless steel bel-lows

Soft-seated plug for better shut-off performance

Standard low-noise plug Special version with flow dividerSt I for further noise reduction (refer to Data Sheet T 8081 EN)

All wetted parts are free of non-ferrous metal

Versions

Excess pressure valve to control the upstream pressure p1 to theadjusted set point. The valve opens when the upstream pressureincreases.

Type 41-73 Standard version

Type 2417 Valve in DN 15 to 100 With metal-seatedplug Body made of cast iron EN-JL1040, spheroidal graphiteiron EN-JS1049, cast steel 1.0619 or CrNiMo steel 1.4408

Type 2413Actuator with EPDM rolling diaphragm

Extended versions

Excess pressure valve with increased safetyActuator with leakage line connection and seal or two dia-phragms and diaphragm rupture indicator Valve with down-stream packing

1) KVS 4: without balancing bellows

The valve opens when the upstream pressure in-creases.

Special versions

Control linekit for pressure tapping at the valve body (acces-sories)

Internal parts made of FPM (FKM), e.g. for use with mineraloils

Free of oil and grease for oxygen with FPM diaphragm EPDM diaphragm with protective PTFE foil

Actuator for remote set point adjustment (autoclave control) Bellows actuator for valves in DN 15 to 100 Set point ranges 2 to 6, 5 to 10, 10 to 22, 20 to 28 bar

Valve with flow divider St I for particularly low-noise opera-tion with gases and vapors

Version entirely made of corrosion-resistant steel

Seat and plug of corrosion-resistant Cr steel with PTFE softseal (max. 220 C) With EPDM soft seal (max. 150 C)

Stellited seat and plug for low-wear operation Free of oil and grease for high-purity applications

Wetted plastic parts complying with FDA regulations(max. 60 C)

Associated Information Sheet T 2500 EN

Associated Data Sheet for accessories T 2595 EN

Edition November 2012

Data Sheet T 2517 EN

Fig. 1 Type 41-73 Universal Excess Pressure Valve


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Principle of operation (Fig. 2)

The medium flows through the valve body (1) in the direction in-dicated by the arrow. The position of the valve plug (3) deter-mines the flow rate across thearea released between the valve'splug and seat (2). The plug stem (5) with the plug is connected tothe actuator stem (11).

To control the pressure, the operating diaphragm (12) ispretensioned by thepositioning springs (7) and the set point ad-juster (6). As a result, the valve is closedby the force of the posi-tioning springs in pressureless state (p1 = p2).

Theupstream pressure p1 to be controlled is tappedupstream ofthe valve and transmitted through the control line (14) to the op-erating diaphragm (12) where it is converted into a positioning

force. This force is used to move the valve plug (3) depending onthe force of the positioning springs (7). The spring force can beadjusted on the set point adjuster (6).

When the force resulting from the upstream pressure p1 exceedsthe adjusted pressure set point, the valve is opened propor-tionally to the change in pressure.

The fully balanced valve is equipped with a balancing bel-lows (4): the downstream pressure p2 acts on the inside of thebellows, theupstream pressure p1 acts on the outside of the bel-lows. As a result, the forces produced by the upstream and

downstream pressures acting on the valve plug are balanced.The valve can be equipped with a flow divider St I. When retro-fitting a flow divider, the valve seat needs to be replaced.

2 T 2517 EN

Fig. 2 Functional diagrams of Type 41-73 Universal Excess Pressure Valve

115 16

3

2

5

6

4

7

8

11

12

10

14

13

13.1

Fig. 2.1 Type 41-73 Universal Excess Pressure Valve, sectionaldrawing

13.1

13

21

20

Actuator with two diaphragms and diaphragm rupture indicator

25

13

13.1

Actuator with leakage line connection

35

31

13.1

13

34

32

30

35

31

30

13.1

13

34

Metal bellows actuator

Fig. 2.2 Type 2413 Actuators, different versions

For 20 to28 bar

For 10 to22 bar

For 2 to 6 and5 to 10 bar

1 Valve body 2 Seat (exchangeable)3 Plug (metal-seated)

4 Balancing bellows5 Plug stem6 Set point adjuster 7 Positioning springs8 Bellows seal10 Type 2413 Actuator11 Actuator s tem12 Operating diaphragm with

diaphragm plate13 Control line connection G 13.1 Screw joint with restriction14 Control line

15 Condensation chamber16 Filler plug20 Diaphragm

21 Diaphragm rupture indicator25 Leakage line connection G 30 Metal bellows actuator31 Bellows with lower section32 Additional springs34 Bellows stem35 Bracket

Pillars turnedinto plane of projection

DN 15 to 50 DN 65 to 100


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3 T 2517 EN

3.2

2

Metal-seated plugwith flow divider St I

3.13.3

2

Soft-seated plug

3.2

2

Valve for low flow rates (KVS 4),without balancing bellows

2 Seat

3.1 Metal-seated plug3.2 Soft-seated plug3.3 Flow divider

Table1 Technical data All pressures in bar (gauge)

Valve Type 2417

Nominal pressure PN 16, PN 25 or PN 40

Nominal size DN 15 to 50 DN 65 to 80 DN 100

Max. perm. differential pressure p 25 bar 20 bar 16 bar

Max. permissible temperature Refer to T 2500 EN for pressure-temperature diagram

Valve plug

Metal seal: max. 350 C PTFE soft seal: max. 220 C EPDM, FPM soft seal: max. 150 C

NBR soft seal: max. 80 C 1)

Leakage class acc. to IEC 60534-4Metal seal: leakage class I (0.05 % of KVS coefficient)Soft seal: leakage class IV (0.01 % of KVS coefficient)

Actuator with diaphragm Type 2413

Set point ranges0.05 to 0.25 bar 0.1 to 0.6 bar 0.2 to 1.2 bar 0.8 to 2.5 bar

2 to 5 bar 4.5 to 10 bar 8 to 16 bar

Max. perm. temperatureGases 350 C, however, max. 80 C at the actuator1) Liquids 150 C, with condensation chamber

max. 350 C Steam with condensation chamber max. 350 C

Actuator with metal bellows Type 2413

Effective area 33 cm 62 cm

Set point ranges 10 to 22 bar 20 to 28 bar 2 to 6 bar 5 to 10 bar

1) Max. 60 C for oxygen

Table 2 Max. permissible pressure at the actuatorSet point ranges Actuator with rolling diaphragm Actuator with metal bellows

0.05 to0.25 bar

0.1 to0.6 bar

0.2 to1.2 bar

0.8 to2.5 bar

2 to5 bar

4.5 to10 bar

8 to16 bar

2 to6 bar

5 to10 bar

10 to22 bar

20 to28 bar

Max. permissible pressure above the set point adjusted at the actuator

0.6 bar 0.6 bar 1.3 bar 2.5 bar 5 bar 10 bar 10 bar 6.5 bar 6.5 bar 8 bar 2 bar

Table 3 Materials Material numbers acc. to DIN EN

Valve Type 2417

Nominal pressure PN 16 PN 25 PN 40

Max. perm. temperature 300 C 350 C 350 C 350 C

Body Cast iron EN-JL1040 Spheroidal graphite ironEN-JS1049 Cast steel 1.0619 Stainless steel1.4408

Seat CrNi steelCrNiMo steel

Plug CrNi steel

Seal for soft-seated plug PTFE with 15 % glass fiber EPDM NBR FPM

Guide bushing PTFE/graphite

Balancing bellows and bellowsseal

Stainless steel 1.4571

Actuator Type 2413

Diaphragm cases Sheet steel DD11 (StW22) 1)

Diaphragm EPDM with fabric reinforcement 2) FPM for mineral oils NBR EPDM with protective PTFE foil

1) CrNi steel in stainless steel version 2) Standard version; for details refer to Special versions

Fig. 3 Type 41-73 Universal Excess Pressure Valve, seat and plug versions


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Installation

Standard installation: Install the regulatorwiththeactuator suspended downwards. Install thehorizontal pipeline with a slight downwardslope on both sides of the valve for condensatedrainage.

For further details on installation refer toEB 2517 EN.

Install the regulator with the direction offlow matching the arrow on the valve body.

Adapt the control line (not included in thescope of delivery) to the conditions on site. A control line kitfor pressure tapping directly at the valve body is availableon request (accessories).

Accessories

Included in the scope of delivery:

Screw joint with restriction for connectionof38" control line

Additional accessories that can be orderedseparately:

Compression-type screw fittings e.g. for

connectionof 6 mm, 8 mmor 12mm pipe Control line kit (optionally with or without

condensation chamber) for direct attach-ment to the valve and actuator (pressuretapping directly at the valve body, for setpoints 0.8 bar).

Condensation chamber for steam condensation and protec-tion of the operating diaphragm against excessive tempera-tures. Required for steam and liquids at temperatures ex-ceeding 150 C.

For details on the accessories refer to Data Sheet T 2595 EN.

Ordering text

Universal Excess Pressure Valve Type 41-73Extended version DN , PN ...

Body material ...

KVS Set point range ... bar

Optionally, accessories (refer to T 2595 EN)Optionally, special version ...

4 T 2517 EN

Type 41-73 Universal

Excess Pressure Valve

Actuator with two diaphragms:

Height H + 50 mm

Fig. 4 Dimensions

Dimensions

Type 41-73Standard version

D

H

H1

H3

L

HType 2413 Actuator

with metal bellows

Type 41-73Control line kit andcondensationchamber


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5 T 2517 EN

Table 4 Dimensions in mm and weights

Excess pressure valve Type 41-73

Nominal size DN 15 DN 20 DN 25 DN 32 DN 40 DN 50 DN 65 DN 80 DN 100

Length L 130 150 160 180 200 230 290 310 350

Height H1 335 390 510 525

Height H3 60 85 110 135

0.05 to 0.25 bar

Height H 445 500 620 635

Actuator D = 380 mm, A = 640 cm

Valve spring force F 1750 N

0.1 to 0.6 bar

Height H 445 500 620 635



0.2 to 1.2 bar

Height H 430 460 600 620



0.8 to 2.5 bar

Height H 430 485 605 620



2 to 5 bar

Height H 410 465 585 600

Actuator D = 170 mm, A = 80 cmValve spring force F 4400 N

4.5 to 10 bar

Height H 410 465 585 600



8 to 16 bar

Height H 410 465 585 600



Weight for version with actuator with rolling diaphragm

0.05 to 0.6 bar Weight, based on castiron PN 16 1),

approx. kg

22.5 23.5 29.5 31.5 35 51 58 67

0.2 to 2.5 bar 16 18 23.5 25.5 29 45 52 61

2 to 16 bar 12 13 18.5 21 24 40 47 56

Version with bellows actuator

2 to 6 bar

Height H 550 605 725 740

Actuator A = 62 cm


5 to 10 bar

Height H 550 605 725 740

Actuator A = 62 cm2


10 to 22 bar

Height H 535 590 710 725

Actuator A = 33 cm


20 to 28 bar

Height H 535 590 710 725

Actuator A = 33 cm


Weightfor version with metal bellows actuator

A = 33 cm Weight, based on castiron PN 16 1),approx. kg

16.5 17.9 18 23.5 25.5 29 48 56 66

A = 62 cm 20.9 21.5 22 27.5 29.5 33 54 65 75

1) +10 % for all valve materials

Setpointranges

Setpointranges


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Valve-specific correction terms

LG For gases and vapors:

Values as specified in the diagramLF For liquids:

LF = 10 (xF xFZ) y

with XF = pp p1 v

and y =KK

V

VS

Terms for valve sizing according to IEC 60534, parts 2-1 and2-2:

FL= 0.95 XT = 0.75

xFZ Acoustical valve coefficient

KVS I, KVS When a flow divider St I has been installed to reducethe noise levelFlow characteristic differences between valves with and withoutflow divider do not occur until the valve has passed throughapprox. 80 % of its travel range

Specifications subject to change without notice

T 2517 EN

SAMSON AG MESS- UND REGELTECHNIKWeismllerstrae 3 60314 Frankfurt am Main GermanyPhone: +49 69 4009-0 Fax: +49 69 4009-1507Internet: http://www.samson.de 2

012-11

0.20 0.4 0.6 0.8 1.0-20

-16

-12

-8

-4

0

[dB(A)]LG

X=pp1

Seat

DN1.0 0.8 0.6 0.4 0.2

Fig. 5 Diagram, LG for gases and vapors

Table 5 KVS coefficients and xFZvalues Terms for noise level calculation according to VDMA 24422 (edition 1989-01)

Nominal size KVS1) xFZ KVS

1) xFZ KVS I

Standard version Special version With flow divider

DN 151 0.6

4 0.5 2.5 0.55 3

DN 20

1 0.6

2.5 4 0.55 0.5

6.3 0.45 5

DN 251 0.6

8 0.4 2.5 4 6.3 0.55 0.5 0.45 6

DN 322.5 4 6.3 8 0.55 0.5 0.45 0.4

16 0.4 12

DN 402.5 4 6.3 8 16 0.55 0.5 0.45 0.4 0.4

20 0.4 15

DN 502.5 4 6.3 8 16 0.55 0.5 0.45 0.4 0.4

32 0.4 25

DN 6520 2) 32 2) 0.4

50 0.4 38

DN 8032 2) 0.4

80 0.35 60

DN 10050 3) 0.4

125 0.35 95

1) For KVS 4: valve without balancing bellows2) Max. permissible differential pressure 25 bar3) Max. permissible differential pressure 20 bar

Documents

Universal Excess Pressure Valve