What Is the Pressure Limit for Mechanical Seals

Typical pressure and temperature limits of common mechanical seal types

Pressure Limit for Types of Mechanical Seals

Mechanical Seal TypePressure Limit (bar)Temperature Range (°C)
Single Mechanical SealUp to 20-40 to 200
Double Mechanical SealUp to 35-40 to 300
Tandem Mechanical SealUp to 50-40 to 250
Cartridge Mechanical SealUp to 70-40 to 400
Gas Mechanical SealUp to 100-100 to 400
Split Mechanical SealUp to 30-40 to 200

Pressure Limit for Materials of Mechanical Seals

Seal ComponentPressure Limit (bar)Temperature Range (°C)
Carbon Graphite20-35-200 to 400
Silicon Carbide100-150-50 to 1000
Tungsten Carbide200-350-50 to 750
Stainless Steel100-200-200 to 800
Fluoroelastomers (FKM)20-35-20 to 200
Perfluoroelastomers (FFKM)30-50-20 to 300
PTFE (Polytetrafluoroethylene)20-30-200 to 250