Operated by steam pilots VS66 and/or solenoid pilots EMS.
Medium operated safety valve for extra large capacities
Preferred solution for Russian GOST boiler applications
Sempell VS99 Pilot Operated Safety Valve
Sempell Model VS99 Pilot Operated Safety Valve

Specs

Size Inlet:
DN 80 – DN 750
NPS 3 – NPS30
Connections:
Welding end
Temperature:
Up to 600°C / 1100°F
Set pressure:
5 bar – 320 bar
Orifice diameter:
44 mm – 438 mm
Body material:
1.0460/SA105
1.7335/SA182 F12
1.7380/SA182 F22
Accessories:
Position indicator, vacuum spring

Features

  • High Tightness, because system pressure acts in closing direction
  • Small opening and closing pressure differences
  • Blow down widely adjustable
  • High setting accuracy and reproducibility
  • Function nearly independent from pressure losses in connected pipes
  • Opening of the safety valve also below set pressure possible
  • Test setting of safety valve during normal plant operation
  • Test of the control function without opening of the safety valve
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