Page 373 - ZF-Catalog-ZSi-Foster-08-19-R3

Seal & Fluid Compatibility Guide
Seal Material
1
1 Captive valve seal ensures “bubble tight” poppet sealing since seal is positively captured by the metal poppet to minimize seal washout or damage from high fluid velocity.
2 Broad range of metals and seal materials allow the use of most fluids.
2
Seal Material
Nitrile (Buna-N)
Viton (product of DuPont)
Neoprene
Ethylene Propylene
Silicone
Seal Compound Data
Part No. Suffix
Std.
-101
-102
-103
-104
Color Code
None
Blue
Red
Black
White
To Order: Add seal compound part number to the end of coupling part number.
1
Example: H4S-103, /2" NPT, FHK Series, steel socket with
ethylene propylene seals (-103).
Note: Please consult with your Foster representative or the factory for any media not listed.
Optional Seal [Ordering]:
Buna-N seal is standard. Alternate seals are specified by adding the appropriate suffix to the catalog number. For example, 3003 socket with Heat Adder is 3003H
Optional Seal Material
Service
Construction
Seal
Temperature
Suffix
Air, Vacuum, Grease & Oil
Water
Hot Water
Steam
Heat
Less Valve
Dill Valve Series 3 Only
Brass & Steel
Brass & S/S
Brass & S/S
Brass Body, Brass Sleeve, & Stainless Steel Valve
Brass & Steel
Brass & Steel
Brass & Steel
Buna-N
Buna-N
Viton
Ethylene Propylene
Viton
Buna-N
-40° to +250°F none
+32° to +100°F W
-15° to +400°F HW
-40° to +300°F S
-15° to +400°F H
-40° to +250°F LV
ZSi-Foster Engineering Catalog
– 373 –
Buna-N
-40° to +250°F D
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