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Sempell Model STE5 Pneumatic Control Unit
Sempell STE5 Pneumatic Control Unit
TÜV type tested Control Unit to operate spring loaded safety valves as Controlled Safety Pressure Relief Sytems (CSPRS) acc.
EN ISO 4126-5

Sempell Controlled Safety Pressure Relief Systems (CSPRS)

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Sempell Model STE5 Pneumatic Control Unit


Ambient Temperature:
Max. 60 °C
Compressed Air Supply:
4 bar min., 8 bar max.
Air Consumption:
During normal operation: 0,08 mN?/h
Quality of Compressed Air:
Filtered and dried; due point temperature at least 10°C lower than ambient temperature
Type of Enclosure:
IP 66
Other versions available on request


  • High tightness up to set pressure due to supplementary load
  • Small opening and closing pressure differences
  • High setting accuracy and reproducibility
  • Opening possible even below set pressure
  • Pressure setting of safety valve during normal plant operation
  • Check of the control function without operation of the safety valve
  • With one unit more than one safety valve can be operated
  • In case of failure, the safety valve opens as direct spring valve (fail-safe function)
  • No electrical energy supply necessary
  • Ideally suitable for explosion Protection