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
Preferred solution for Russian GOST boiler applications
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Sempell Model VS99 Pilot Operated Safety Valve
Sempell Model VS99 Pilot Operated Safety Valve
Specs
Size Inlet:
DN 80 – DN 750
NPS 3 – NPS30
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
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