All specifications are subject to change without notice.

All sales subject to standard terms and conditions.

©2021 Ashcroft Inc. 400-500_Thread_Seal_ds_RevH_06-28-21

ashcroft.com

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1.800.328.8258

Data Sheet

400/500 Threaded All-Welded Diaphragm Seal

of 4

3

TABLE 1 - OPTIONS

Code

Option

400

401

500

501

Notes

LD

Stainless steel locking device

•

•

PU

Pipe plug for flushing connection

•

•

Plug will match bottom housing material

HB

Hastelloy® C-276 upper housing

•

•

•

•

SE

SS rings and bolts

•

•

1,500 psi Max., 5,000 psi Max. with XHP

HP

High-pressure clamp rings

•

•

9,000 psi Max., 5,000 psi Max. with SE

6B

Cleaned for oxygen service

•

•

•

•

AW

Single ½ NPT flushing connection

•

•

¾ NPT Female or smaller process connection

DB

Dual ½ NPT flushing connections

•

•

¾ NPT Female or smaller process connection

DK

Dual ¼ NPT flushing connections

•

•

DU

Instrument welded to seal

•

•

•

•

MQ

Positive material identification

•

•

•

•

W1

Dye penetrant testing

•

•

•

•

CD-5

NACE compliance certificate

•

•

•

•

Stainless, Hastelloy®, or Monel® wetted materials

CD-6

Typical material certification

•

•

•

•

TABLE 2 - FILL FLUIDS

Fill Fluid

Temperature

Viscosity

(cSt)

Code

Notes

Syltherm® XLT

-150°F to 500°F (-100°C to 260°C)

1.4

CC

Low temperature applications

Glycerin (food grade)

0°F to 400°F (-18°C to 204°C)

1,300

CG

Direct-mounting only. Not for use with

vacuum service

50 cSt Silicone

-40°F to 500°F (-40°C to 260°C)

50

CK

Halocarbon® 4.2

-70°F to 300°F (-57°C to 199°C)

4.2

CF

For use with oxygen/oxidizing process

media

50/50 Ethylene Glycol/Water

-25°F to 190°F (-32°C to 88°C)

2.9

CT

Polypropylene Glycol

-50°F to 325°F (-46°C to 163°C)

54

CV

Food-grade Silicone

-40°F to 500°F (-40°C to 260°C)

350

CZ

10cSt Silicone

-40°F to 500°F (-40°C to 260°C)

10

DJ

Distilled Water

40°F to 185°F (4°C to 85°C)

0.9

FJ

Ethylene Glycol

20°F to 325°F (-7°C to 163°C)

14

FK

50/50 Glycerin/Water

15°F to 200°F (-9°C to 93°C)

30

GH

80/20 Glycerin/Water

15°F to 225°F (-9°C to 107°C)

270

GR

Slytherm® 800

-40°F to 750°F (-40°C to 400°C)

10

HA

High temperature applications

Calflo® AF

-20°F to 600°F (-29°C to 316°C)

60

KF

High temperature, silicone-free

Mineral Oil

10°F to 400°F (-12°C to 204°C)

75

MY

Neobee® M-20

5°F to 400°F (-15°C to 204°C)

9.5

NM

Food grade

95/5 Water/Propylene Glycol

40°F to 185°F (4°C to 85°C)

1.0

PY