The secondary seal is the auxiliary seal seals, which can be divided into static and dynamic seals, which can be roughly divided into:
1.O-RING rubber
4.V-ring/Wedge ring
ASTM Name | Tenp riang | |
FFKM | -10°C~+260°C | |
FKM | -15°C~+200°C | |
FEPM | -15°C~+200°C | |
EDPM | -55°C~+150°C | |
NBR | -10°C~+100°C | |
PTFE | -70°C~+150°C | |
GRAPJITE | -200°C~+400°C | |
SPRIAL WOUND | -200°C~+600°C | |
T/1995 | -170°C~+460°C |
ASTM Name | scientific name | product name |
FFKM | Perfluoroelastomer | Kalraz® |
FKM | Fluoroelastomer | Viton® |
FEPM | Tetra-Fluoroethylene | Aflas® HTCR® |
EDPM | Ethylene Propylene | |
NBR | Nitrile Butylrubber | |
PTFE | Polytetrafluoroethylene | Teffon® |
GRAPJITE | Graphite | |
SPRIAL WOUND | SPRIAL WOUND | |
T/1995 | Non-Asbestons |
ASTM Name | Acid | Alkali |
Hot water /steam |
High temperature |
FFKM | X | X | X |
X |
FKM | X | |||
FEPM | X | X | ||
EDPM | X | X | ||
NBR | X | |||
PTFE | X | X | X | |
GRAPJITE | X | |||
SPRIAL WOUND | X | X | ||
T/1995 | X | X | X |