In the valve model designation system, how are the codes for sealing surfaces or lining materials specified?
Date: 2025-12-29Views: 2534
The material code for sealing surfaces machined directly from the valve body is denoted by “W”; see the table below for the codes of other materials.
Designation for valve seat sealing surface or lining material:
Seat Sealing Surface or Lining Material | Code Name | Seat Sealing Surface or Lining Material | Code Name |
Tin-Based Bearing Alloy (Babbitt Metal) | B | Nylon Plastic (Polyamide) | N |
Enamel (Glass-Lined Coating) | C | Boronized Steel | P |
Nitrided Steel | D | Lead-Lined | Q |
Fluoroplastics (PTFE, PFA, FEP) | F | Austenitic Stainless Steel | R |
Ceramics | G | Plastics (Engineering Plastics) | S |
Cr13-Series Stainless Steel | H | Copper Alloys | T |
Rubber-Lined | J | Rubber (Elastomers) | X |
Monel Alloy | M | Cemented Carbide (Tungsten Carbide) | Y |
Note: When the sealing surfaces of a sealing pair are made of different materials, the material with the lower hardness is used to denote the pair.
