Cut-off valves

Equipment  ›  Armature  ›  Cut-off valves

     
21    Cut-off valves – safety valves
Safety ball valve for overpressure relief of boiler/superheater header – is installed in parallel with spring-loaded safety valve and it’s set pressure is lower than set pressure of spring-loaded safety valve for 1 bar , also safety ball valve can operate as cut-off valve.

Temperature up to +600 °С
DN 65- 100
Pressure up to 770 bar

Safety ball valves advanages:

  • zero leakage from stem packing in the most severe temperature shocks
  • high nickel alloy base ball and seat with a proprietary coating ensures superior wear resistance
  • quick operating pneumatic actuator decreases wear on sealing surfaces
  • field repairable
     
22   Cut-off valveCut-off valve constist of a ball valve and Butterfly valve and quick action pneumatic actuator. Operating time of this valve less than 1 second.

Connection type: flanged, interflanged, welded, socket.

Temperature from -40 °С to +250 °С
DN 15-300
PN 6-40