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High Pressure Pilot Valves

HIGH PRESSURE PILOT VALVES FOR OPERATING ACTUATORS OF THE PRIMER CIRCUIT COOLING SYSTEM

nuclear power plant

CUSTOMER CHALLENGE

The customer required 3/2 valves for operating the actuators of the cooling system in the primer circuit of a Nuclear Power Plant (NPP) with an operating pressure of 50 bar.

The critical safety level requires pilot valves with a very low leakage rate and double coil safety actuation.  Any solution also needs to be be earthquake resistant and 3.1. material certified.

NORGREN SOLUTION 

The Norgren solution incorporated a Herion 1090050 safety pilot valve - Indirect acting double solenoid valve.

Technical features: 

  • Operating pressure: 15 to 75 bar (Test pressure: 90 bar)
  • Temperature range: -10°C to +80°C (Test temperature: +150°C)
  • DN10 nominal size with flange and G 3/8” connections
  • Body and internal parts material: stainless steel
  • Elastomers: FKM
  • Voltage: 220/230VAC, 50 Hz