Secondary sealO-ring/Gasket

   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

  1. Gasket
  2. High temperature graphite

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