Ten Steps to Select a Diaphragm Seal

BULLETIN S10

Ashcroft Inc., 250 East Main Street, Stratford, CT 06614 USATel: 203-378-8281 • Fax: 203-385-0408email: info@ashcroft.com • www.ashcroft.com

All specifications are subject to change without notice. All sales subject to standard terms and conditions. © Ashcroft Inc. 2015 04/15

DIAPHRAGM TYPEIs the requirement for the diaphragm configuration threaded, welded, bonded or clamped to the top housing. Design types are:Threaded Design: ensures a positive sealing surface. The diaphragm can be replaced if damaged.

Welded or Bonded Design: Metallic Diaphragm- welded to top housing.Elastomeric Diaphragm: bonded to top housing. Both ensure maximum leak integrity.

Clamped Design: available with elastomeric diaphragms only. Diaphragm is clamped between top and bottom housing.

PROCESS TEMPERATURE LIMITS When selecting the required system assembly fill fluid, lower housing and diaphragm material, ensure minimum and maximum temperature limits are compatible with the selected fill fluid, diaphragm and lower housing materials. When the requirement is for a flanged seal, refer to ASME B16.5 for pressure and temperature limits.

TOP HOUSING, FLANGE OR CLAMP RING MATERIAL, CLAMP BOLTS Consider environmental compatibility when selecting. Flanged Type Seals: Standard flange material is nickel plated carbon steel. Threaded Type Seals: When a clamped ring is offered, standard material is black painted carbon steel. Clamping Bolts: Standard bolt material is zinc plated carbon steel. See Diaphragm Seal Options page 4 when the standard material is not compatible with environmental conditions.

LOWER HOUSING & DIAPHRAGM MATERIAL Both the diaphragm and lower housing are 'wetted parts' and must be compatible with the

process media. Refer to our Corrosion Data Guide under Technical Info at www.ashcroft.comfor material compatibility. Process temperature limits and concentration are a requirementwhen selecting lower housing and diaphragm material.

FILL FLUID Consider process temperature and process media compatibility when selecting the system fill fluid. A fill fluid other than glycerin is required for vacuum and compound gauge ranges. Glycerin fill is not available when capillary is required between the instrument and diaphragm seal.

INSTRUMENT CONNECTION SIZEDetermine if a 1⁄4 NPT or 1⁄2 NPT is required

SEAL TYPEWhen determining a seal type, two requirements must be considered: 1. Process Connection Type –A threaded design seal connects directly to the process with a female or male NPT connection. A flanged design seal is attached to the process with a flange as specified in ASME B 16.5. An in-line welded design seal is suitable for flow-thru applications.

2. Type Number –

PROCESS CONNECTION SIZE & TYPESelect process connection size. If the requirement is for a threaded seal determine if a male or female connection is required.

MAXIMUM ALLOWABLE WORKING PRESSUREEnsure the instrument full scale range does not exceed the rated pressure of the diaphragm seal. Flanged seal class ratings are in accordance with ASME B16.5. If the diaphragm seal will be used with a differential pressure instrument, the instrument static pressure should notexceed the rated pressure of the diaphragm seal.

FLANGE TYPEIf the requirement is for a flanged seal, determine if a raised face, flat face or ring joint flange is required

HOW TO ORDER: (Refer To Table On Pages 2 & 3 � � � � � Typical ordering code: 10–102–SS–04T–XCGYT–150–RF

� — From process connection size (code 10 = 1˝)

� — From type number (code 102 = flanged seal with threaded diaphragm)

— From lower housing and diaphragm material (1st S = 316 st. st. diaphragm, 2nd S = 316 st, st. lower housing

� — From instrument connection size (code 04T = 1⁄2 NPT )

— Diaphragm seal assembly fill fluid & options; precede option code with ‘X’ (code CG from page 3 = glycerin instrumentand seal fill, code YT from page 4 above = top housing 316 st. st.)

� — If a flanged seal, select flange rating (code 150 = 150 ANSI B16.5 class flange)

� — If for a flanged seal, select flange type (code RF = ANSI B16.5 raised face flange)

ASHCROFT

OFFERS A WIDE

SELECTION OF

OPTIONS,

SEE PAGE 4.

NOTES:(1) 5000 psi pressure rating

(2) 9000 psi pressure rating

(3) Standard with monel diaphragm

(4) Fill must be XCF (Halocarbon)

150, 300,600,

900, 1500

Metal diaphragm (750°) Teflon (-40/400°F)

Viton (-40/350°F)Kalrez (30/212°F)

Glycerin

HalocarbonSilicone

�

�

�

�

�

�

�

�

Diaphragm Seal Options

SS Cleaning SS Pipe Clamp/ High Clamping For Positive

SS Armored Plug for Top Top Top Flange Pressure Bolts Gaseous Inst. MaterialArmored Capillary Flushing Housing Housing Housing Rings Clamp 300 Oxygen or Welded Ident.Capillary w/PVC Conn. 316 SS Monel Hastelloy C Bolts Rings Series Strong to Seal (PMI)

Sleeve Nuts SS OxidizingAgents(4)

CODE 1115A 1115P PU YT YM HB SE HP SB 6B DU MQSEAL TYPETYPE NUMBER

100 • • • • •(1) • • • •101 • • • • • •(1) • • • •200 • • • • • •(1) • • • •201 • • • • • • •(1) • • • •300 • • • • •(1) • • • •301 • • • • • •(1) • • • •104 • • • • • •310 • • STD STD(3) • • •315 • • STD STD(3) • • •311 • • STD • • •312 • • STD • • •330 • • • • •400 • • STD STD(3) • • •(2) • • • •401 • • • STD STD(3) • • •(1) • • • •500 • • STD STD(3) • • • •501 • • • STD STD(3) • • • •510 • • STD STD(3) •(1) • • STD511 • • STD STD(3) • • STD740 • • STD STD(3) • • •741 • STD STD(3) • • •102 • • • • • • • •103 • • • • • • • • •202 • • • • • • • •203 • • • • • • • • •302 • • • • • • • •303 • • • • • • • • •106 • • • • • • •206 • • • • • • •402 • • STD STD(3) • • • •403 • • • STD STD(3) • • • •702 • • STD STD(3) • • •703 • • • STD STD(3) • • •105 • • • • • • •107 • • • • • •108 • • • • • • •205 • • • • • • •207 • • • • • •208 • • • • • •

QUICK CONN. 320 • • • • •

THREADED

FLANGED

IN-LINE

4

Ash Bul S-10 TTS.qxp_layout 4/1/15 10:36 AM Page 1

100 101

200 201

300 301

104 310

315 311

312 330

400 401

500 501

510 511

740 741

102 103

202 203

302 303

106 206

402 403

702 703

104 105

107 108

204 205

207 208

320

THREADED

FLANGED

IN-LINE

QUICKCONNECT

F/M F/M F/M F/M • • • • • • • • • • • • • • • •(5) • • • • • • • • • F/M F/M F/M F/M • • • • • • • • • • • • • •(5) • • • • • • • F/M F/M F/M F/M • • • • • • • • • • • • • • • • • • • • • •(5) • • • • • • • • • • • • • • F/M F/M F/M F/M • • • • • • • • • • • • • • • • • • •(5) • • • • • • • • • • • • F/M F/M F/M F/M • • • • • • • • • • • • • • • • •(4) •(4) •(4) •(4) •(4) •(4) •(4) •(4) •(4) • • • • • • • • F/M F/M F/M F/M • • • • • • • • • •(6) • • •(4) •(4) •(4) •(4) •(4) •(4) •(4) •(4) •(4) • • • • • • F F • • • • • • • • • • • • •(5) • • • • • F/M F/M M M • • • • • • • •(1) • • • F F • • • • • • • •(1) • • • F/M F/M F/M F/M • • • • • • • • • F F • • • • • • • • • ALL M • • • • • • • • F/M F/M F/M F/M • • • • • • • • •(1) •(2) • • • • • • F/M F/M F/M F/M • • • • • • • • •(1) •(2) • • • • • • F/M F/M F/M F/M • • • • • • • •(1) •(2) • • • • • • F/M F/M F/M F/M • • • • • • • •(1) •(2) • • • • • • M • • • • • • •(1) • • • • M • • • • • • •(1) • • • • F F F F • • • • • • • •(1) •(2) • • •(5) • • • • • F F F F • • • • • • • •(1) •(2) • • •(5) • • • • • • • • • • • • • • • • • • • • • • • • • • • •(6) • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • •(5) • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • •(6) •(6) •(6) • • • • • • • • • • • • • •(4) • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • •(5) • • • • • • • • • • • • • • • •(8) • • • • • • • • • • • • • • • • •(6) •(6) •(6) • • • •(4) •(4) •(4) •(4) •(4) •(4) •(4) •(4) •(4) • • • • • • • • • • • • • • • • • • • • • • • • • • • • • •(4) •(4) •(4) •(4) •(4) •(4) •(4) •(4) •(4) • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • •(5) •(5) • • • • •

ALL

• • • • • • • • • • • • • • • • • • • • • • • • • • • •(5) • • • • • • • • • • • • • • • • • • • • • • • • • • • • • •(1) • • • •(5) • • • • • • • • • • • • • • • • • • • • • • • • • •(1) • • • •(5) • • • • • • • • • • • • • • • • • • • • •(1) • • •(5) • • • • • • • • • • • • • • • • • • •(1) • • •(5) • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • •(5) • • • • • • • • • • • • • • • • • • • • • • • • • •(5) • • • • • • • • • • • • • • • • • • • • • • • •(5) • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • •(5) • • • • • ALL • • • • • • • • • • • • • • • • • • • • •(5) • • • • • • • • • • • • • • • • • • • • • • • • •(5) • • • • • • • • •(3) • • • • ALL

MAXIMUM ALLOWABLE WORKING PRESSURE (MAWP) PROCESS CONNECTION SIZE (inches) INST DIAPH. FLANGE PROCESS TEMP. LIMITS TOP HOUSING LOWER HOUSING & DIAPHRAGM FILL FLUIDS CONN. DESIGN For process temperature <100°F) TYPE

FEMALE (F), MALE (M) SIZE TYPE

PSI CLASS FLANGE DIAPHRAGM LOWER

MATERIALS MATERIALS PROCESS TEMP. LIMITS (NPTF) ANSI B 16.5 HOUSING

NOTES: (1) Standard when welded monel diaphragm is specified. (2) Standard when titanium diaphragm is specified. (3) 2˝ Triclamp size only. (4) Lower housing only. (5) Diaphragm only. (6) 1˝, 11⁄2˝, 2˝ only. (7) For use with process media containing strong oxidizing agents. (8) Teflon only.

Ten Steps to Select an Ashcroft® Diaphragm Seal

� � � � ��� �

2 3

1 ⁄4(Cod

e 25

(fem

ale), C

ode 02

(male)

1 ⁄2(Cod

e 50

(fem

ale), C

ode 04

(male)

3 ⁄4(Cod

e 75

(fem

ale), C

ode 06

(male)

1 (Cod

e 10

(fem

ale), C

ode 08

(male)

11⁄2(Cod

e 15

(fem

ale)

2 (Cod

e 20

(fem

ale)

3 (Cod

e 30

(fem

ale)

4 (Cod

e 40

(fem

ale)

6 (Cod

e 60

)

8 (Cod

e 80

)

1 ⁄4(Cod

e 02

(fem

ale)

1 ⁄2(Cod

e 04

(fem

ale)

Th

read

ed (1

00 series)

Welde

d or bon

ded elastomer

Clam

ped (300

series)

75

# (PVC

lower hou

sing

)

20

0# (P

VC or K

ynar lo

wer hou

sing

)

27

0# (T

eflon lower hou

sing

)

50

0#

50

0# (V

iton or Kalrez diap

hrag

m)

75

0#

10

00#

15

00#

25

00# (Teflon & metal diaph

ragm

s)

30

00#

44

00#

90

00# (w

ith XHP

)

15

0 Class Flan

ge

30

0 Class Flan

ge

60

0 Class Flan

ge

90

0 Class Flan

ge

15

00 Class Flang

e

25

00 Class Flang

e

Ra

ised

Fac

e (RF)

Flat Fac

e (FF)

Ring

Joint (R

J)

Metal (7

50°)

Teflo

n (-40

/400

°F)

Viton (-40

/350

°F)

Ka

lrez (30/21

2°F)

Metal (7

50°F)

PV

C: (7

4°F), flang

ed (1

00°F)

Teflo

n: (7

4°F), flang

ed (1

50°F)

Ky

nar: (100

°F)

Nick

el plated ca

rbon

steel

31

6 SS

(XYT

whe

n no

t stand

ard)

Mon

el (X

YM w

hen no

t stand

ard)

Titanium

Ha

stelloy C2

76 (X

HB)

30

4 SS (lo

wer hou

sing

and

/or d

iaph

.) (cod

e C diap

h., c

ode C lower hou

sing

)

31

6 SS (lo

wer hou

sing

and

/or d

iaph

.) (cod

e S diap

h., c

ode S lower hou

sing

)

Mon

el 400

(low

er hou

sing

and

/or d

iaph

.) (cod

e P diap

h., c

ode M lo

wer hou

sing

)

Nick

el (low

er hou

sing

and

/or d

iaph

.) (cod

e N diap

h., c

ode N lower hou

sing

)

Ca

rpen

ter 2

0 (lo

wer hou

sing

and

/or d

iaph

.) (cod

e D diap

h., c

ode D lower hou

sing

)

Tantalum

/Tan

talum clad (lower hou

sing

& diaph

.) (cod

e U diap

h., cod

e SU

lower hou

sing

Ha

stell oy B (lo

wer hou

sing

and

/or d

iaph

.) (cod

e G diap

h., c

ode G lower hou

sing

Ha

stelloy C 27

6 (lo

wer hou

sing

and

/or d

iaph

.) (cod

e H diap

h., c

ode H lower hou

sing

)

Ha

stelloy C 22

(low

er hou

sing

and

/or d

iaph

.) (cod

e J diap

h., c

ode J lower hou

sing

)

Titanium

(low

er hou

sing

and

/or d

iaph

.) (cod

e TI diaph

., co

de TI low

er hou

sing

)

Ha

lar c

oated Mon

el (low

er hou

sing

and

/or d

iaph

.) (cod

e R diap

h. cod

e BH

lower hou

sing

Viton (diaph

ragm

only) (c

ode Y)

Teflo

n (diaph

ragm

only) (c

ode T)

Ka

lrez (diaph

ragm

only) (c

ode K)

Stee

l (lower hou

sing

) (co

de B)

Inco

nel (lower hou

sing

only) (c

ode W)

PV

C (lo

wer hou

sing

only) (c

ode V) 1/4,1/2 proce

ss con

n. size on

ly

Teflo

n (lo

wer only) (c

ode T) 1/4,1/2 proce

ss con

n. size on

ly

Ky

nar (lower hou

sing

only) (c

ode KY

) 1/4,1/2 proce

ss con

n. size on

ly

Glycerin (0

/400

°F, –

18/204

°C) d

irect m

ount only (Cod

e CG

)

Silcon

e (–40

/600

°F, –

40/315

°C (c

ode CK

))

Fo

od grade

Silico

ne (–

40/600

°F, –

40/315

°C) (co

de CZ)

Ha

loca

rbon

(7)(–70

/300

°F, –

56/149

°C) (co

de CF)

Sy

ltherm (–

40/750

°F, –

40/400

°C) (co

de HA)

Ne

obee

M-20 (0/320

°F, –

17/160

°C) (co

de NM)

MODELNUMBER

SEALTYPE

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