Single high-temperature seals with weld metal bellows.
The material varies from the stainless steel to high-alloy steel and alloys, containing nickel. Friction pairs can be made of carbongraphite, tungsten carbide, silicon carbide; secondary seals can be made of flexitallic, graphoil, klingerit etc.
Temperature of the pumping medium, ВєC to +425
Pressure of the pumping medium, MPa