Nuclear Power Plants

SEITZ VALVE
SCRAM SOLENOID VALVE

Seitz Valve (NPP) Nuclear Power Plants

Seitz Valve Scram Solenoid Pilot Valve Type 1B74

The Scram Solenoid Pilot Valves (SSPVs) are an integral part of the BWR reactor protection system. SSPV type 2562 was designed to original specifications and fits into the existing mounting configuration of the BWR Hydraulic Control Unit with no hardware modification needed

Operating systemPilot operated with system media fluid
Function3-way, NC
FluidAir / Nitrogen
Nominal diameter14 mm (0.55 in)
Ambient temperatureMax. 40°C (104°F)
Pressure range1 to 9 bar (15 to 131 psig)
Flow coefficient Kv (Cv)3.44 (4.00)
LeakageMax. 1.4 Nl/h (23.6 scc/min.)
Weight0.970 kg (2.14 lbs)
MaterialBody: Aluminum Ti-anodized Elastomers: FKM
Response timeat 45 psig < 40 ms at 17.5 psig < 60 ms
Reset from scram≤ 20 s