Butterfly Valves
Butterfly valves Main Part Material
Body of Material
| Type of Material |
Material Standard |
| Cast Iron |
GG20 GG25, ASTM A126 Class B |
| Ductile Iron |
GGG40,ASTM A536 60-40-18 |
| Cast Bronze |
ASTM B584 G90500 |
| Stainless Steel |
CF8M, CF8, ZG1Cr18Ni9Ti |
| Carbon Steel |
WCB |
Disc Material
| Ductile Iron (Nickel Plated or Nylon Coated) |
ASTM A536 60-40-18 DI |
| Stainless Steel |
SS410, SS304, SS316 |
| Aluminum |
Al-Bronze |
Stem Material
| Stainless Steel |
SS410, SS304,SS316 |
| Cast Steel |
WCB (chrome plated) |
Seat Material of Body Liner Material
| Material |
Temperature Ratio |
| ℃ |
℉ |
| Buna-N(NBR) |
-12----85 |
+10----185 |
| Buna-N(Abrasive Resistant) |
-12----85 |
+10-----185 |
| Neoprene |
-7----93 |
20----200 |
| EPDM |
-35----135 |
-30----275 |
| EPDM (Food Grade) |
-35-----110 |
-30----230 |
| Hypalon |
-32----135 |
0-----275 |
| Vinton |
-12----135 |
10---275 |
| PTFE |
4.4----121 |
40---250 |
Seat Materials are capable of standing lower temperatures without damage. However it would become hard and torques would increase .Some flow
media may further rest published temperature limits or significantly reduce seat life.
|
