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Sempell Model 802 Swing Check Valve with Power Assist
Sempell Model 802 Swing Check Valve with Power Assist
A free-swinging design enables the valve to close by disc weight, preventing damage in the turbine from reverse flow.
Sempell Model 802 Swing Check Valve with Power Assist


DN 350 - 800, NPS 14 -32
up to PN160, up to class 900
Body sealing
Self sealing, cover sealing
Shaft sealing
Molded graphite packing rings
Closure time
< 2 sec.
Body: SA217WC6
Shaft: 1.4122 nitriding Disc
lever = Hardfacings: 1.4115
Bearing sleeve 1.8550 nitriding
Leakage class
Leakage rate 2 acc. To DIN3220 part 3 or IEC 534 part 4, Class IV, test course 2, medium L
Welding ends acc. to EN/DIN and ASME


  • Low maintenance gland can be retightened
  • Hard-faced sealing faces at disc and body seat
  • Low friction by burnished shaft
  • Surfaces treated bearing faces on each part with relative motion
  • Easy to disassemble bodies.
  • Mechanical taking of control angle directly at disc lever
  • Mounting of pneumatic or hydraulic actuators.
  • Actuator mounting right or left possible seen from steam flow direction.
  • Universal connections by various design of welding ends and flanges as standard.
  • Deviating designs of welding ends in regardof dimension and material as well as other actuators, limit switches and special designs according to customers request can be supplied


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