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Sempell Model SOH High Pressure Steam Safety Valve
Sempell SOH High Pressure Steam Safety Valve
High pressure safety valve for boiler protection with welding end or flanged connections
Sempell Model SOH High Pressure Steam Safety Valve


Size Inlet:
DN 40 – DN 250
NPS 1 ½? – NPS 10?
Temperature Range:
Up to +700 °C / +1300 °F
Set Pressure:
10 – 320 bar
Orifice Diameter:
17.5 ?–160 mm
Open bonnet, balanced piston, pneumatically assisted
Body Material:
1.0619/SA216 WCB
1.7335/SA182 F12
1.7357/SA217 WC6
1.7380/SA18 F22
1.7379/SA217 WC9
1.4903/SA182 F91
1.4901/SA182 F92
Other materials available on request
Position indicator


  • High tightness up to set pressure due to supplementary load
  • Smooth operation (no forces by popping)
  • Rigid body design
  • Self-aligning spring assembly
  • Low friction, spring compression
  • Mechanical lift stop ensures functional stability
  • Locking for hydrostatic test without additional parts
  • High allowable back pressure


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