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Sempell Series S, Safety Valve
Sempell Series S Safety Valve
Direct spring-operated safety relief valve with DIN flanges, ASME flanges or welding end connections
Sempell Series S, Safety Valve


Size inlet:
DN 25 – DN 200
NPS 1 – NPS 8
Pressure rating:
PN 10 – PN 500
class 150 – class 2500
Temperature range:
–200°C to +700°C
–300°F to +1300°F, –450°F to +1000?F
Set pressure:
0.2 bar – 500 bar, 15 – 6000psi
Orifice diameter:
14 mm – 160 mm, 0.11 in? – 26 in?
Body materials:
1.0619/SA216 WCB
1.7357/SA217 WC6
1.6220/SA352 LCC
1.4408/SA351 CF8M
Other materials available on request
Cooling spacer, balanced piston, lifting lever, test gag, position indicator, reinforced bellows, adjusting ring, soft seat
Other accessories on request


  • Single trim design for steam, gases and liquids
  • Rigid light weight body construction
  • Two piece spindle
  • Low friction thermo elastic guide
  • Self-aligning spring assembly
  • Low friction, spring compression
  • Cap design ensures safe and reliable assembly of valve lifting levers
  • Locking for hydrostatic test without additional parts, cap top doubles up as gagging device
  • Gagged status indicator