|
四、Materials of Main Parts
| Type |
Diaphragm type |
Piton type |
| Part |
Materials |
Part |
Materials |
| 1 |
Bonnet |
Casting pig,Ductalloy,carbon steel,SS |
Bonnet |
Casting pig,Ductalloy,carbon steel,SS |
| 2 |
spring |
Spring steel SS |
Cylinder sleeve |
SS |
| 3 |
Pressboard of diaphragm |
Casting pig,Ductalloy,carbon steel,SS |
Piston |
Ductalloy |
| 4 |
Diaphragm |
Acrylonitrlle nyon reinforced rubber,ternary ethylenepropylene nylon reinforced rubber |
seal ring |
NBR．Ternary etyleneproplene |
| 5 |
stem |
2cr13、2cr13．ss |
Steam |
2cr13、2cr．ss |
| 6 |
Disc |
Casting pig.Ductalloy,carbon steel,copper.SS |
spring |
Spring steel,SS |
| 7 |
O-ring |
NBR,ternary ethylenepropylene rubber |
Disc |
Casting pig.Ductalloy,carbon steel,SS |
| 8 |
Pressboard of O-ring |
Casting pig,Ductalloy,carbon steel,SS |
Sealing pad |
NBR．Ternary etyleneproplene |
| 9 |
Seat ring |
Cu-alloy .SS |
Seal ring |
Cu-alloy．SS |
| 10 |
Body |
Casting pig.Ductalloy,carbon steel SS |
Seal pressboard |
Casting pig,Ductalloy,carbon steel,SS |
| 11 |
|
|
阀体 Body |
Cast iron,Ductalloy,carbon steel body |
五、 MAIN TECHNIQUE NUMBER
| Nominal pressure |
1.0 |
1.6 |
2.5 |
| Test pressure (MPa) |
Shell strength |
1.5 |
2.4 |
3.75 |
| 密封性能 |
11 |
1 76 |
2 75 |
| NP8 nominal diameter |
Diaphragm type：50～450
Piston type：500～800 |
| Available media |
Water or water-like media |
| Working temperature |
≤80 |
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