In the valve model designation method, how are the codes for sealing surfaces or lining materials specified?

Date: 2025-12-29Views: 690

The sealing surface material code for surfaces machined directly from the valve body is denoted by “W”. Codes for other materials are listed in the table below.

Seat sealing surface or lining material code:

Seat sealing surface or lining material

nicknames

Seat sealing surface or lining material

nicknames

Tin-based bearing alloys (pasteurized alloys)

B

Nylon Plastic

N

enamels

C

Boron-infiltrated steel

P

nitriding steel

D

lead lining

Q

fluoroplastic

F

austenitic stainless steel

R

ceramics

G

plastics

S

Cr13 stainless steel

H

Copper Alloy

T

rubber lining

J

caoutchouc

X

Monel alloy

M

Cemented carbide

Y

 

Note: When the sealing surfaces of a sealing pair are made of different materials, the designation code of the softer material shall be used.