Nuclear Power Plants

Seitz Valve (NPP) Nuclear Power Plants

Seitz Valve Direction
Control Valve

Directional Control Valves (DCV) are used to position the control rods as a part of the BWR control rod drive system. DCV type 2538 was designed to original specifications and fits exactly into the existing mounting configuration of the BWR Hydraulic Control Unit with no hardware modification needed

Operating systemPilot operated with system media fluid
Function2-way, NC
FluidDemineralized water
Nominal diameter7 mm (0.28 in)
Flow coefficient Kv (Cv) throttle fully open)0.48 (0.55)
Flow rate(throttle fully open)0.48 m3/h (2.11 gpm)
Reverse flow differential pressure0.45 bar (6.5 psig)
Max. differential pressure137 bar (1987 psig)
Testing overpressure207 bar (3002 psig)
Design temperature138°C (280.4°F)
Open/Close time< 50 ms / < 400 ms)
Pressure range6 to 138 bar (87 to 2002 psig)
Ambient temperature4.4 to 49°C (40 to 120°F)
LeakageMax. 0.12 Nl/h (2 scc/min)
Weight2.8 kg with throttle (6.2 lbs)2.6 kg w/o throttle (5.7 lbs)
MaterialBody: 316L (EN 1.4435)Elastomers: FKM
Mounting Details (SIL No.678. Nov. 30th 2015)4 x cap screws with GEOMET 500® coating

SEITZ VALVE
DIRECTIONAL CONTROL VALVE

Nuclear Directional Control valve

Seitz Valve (NPP) Nuclear Power Plants

Seitz Valve Direction
Control Valve

Directional Control Valves (DCV) are used to position the control rods as a part of the BWR control rod drive system. DCV type 2538 was designed to original specifications and fits exactly into the existing mounting configuration of the BWR Hydraulic Control Unit with no hardware modification needed

Operating systemPilot operated with system media fluid
Function2-way, NC
FluidDemineralized water
Nominal diameter7 mm (0.28 in)
Flow coefficient Kv (Cv) throttle fully open)0.48 (0.55)
Flow rate(throttle fully open)0.48 m3/h (2.11 gpm)
Reverse flow differential pressure0.45 bar (6.5 psig)
Max. differential pressure137 bar (1987 psig)
Testing overpressure207 bar (3002 psig)
Design temperature138°C (280.4°F)
Open/Close time< 50 ms / < 400 ms)
Pressure range6 to 138 bar (87 to 2002 psig)
Ambient temperature4.4 to 49°C (40 to 120°F)
LeakageMax. 0.12 Nl/h (2 scc/min)
Weight2.8 kg with throttle (6.2 lbs)2.6 kg w/o throttle (5.7 lbs)
MaterialBody: 316L (EN 1.4435)Elastomers: FKM
Mounting Details (SIL No.678. Nov. 30th 2015)4 x cap screws with GEOMET 500® coating

SEITZ VALVE
DIRECTIONAL CONTROL VALVE

Nuclear Directional Control valve

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Size RangeDN8 – 50 / 1/4” – 2” standard port
Max Temp260 °C / 500 °F
Pressure Rating55 bar up to 800 psi (55 bar)
MaterialCarbon Steel, Stainless Steel, Brass body materials
EndThreaded

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