Nuclear Power Plants

SEITZ VALVE
SCRAM SOLENOID VALVE

Scram Solenoid Pilot 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

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

Engine Systems

SEITZ VALVE
PILOT VALVES

Pilot Valve

Seitz Valve Engine Systems

Seitz Valve Pilot Valves for Diesel and Gas Engine

Seitz offers individually optimised Pilot Valves for starting systems of two stroke engines. These Pilot Valves control the Start Valve of each cylinder individually and support the slow turn function as well

Three Variants are Available 
  • 5/2-way Pilot Controlled Pneumatic Valve
  • 5/2-way Electro-Pneumatic Valve
Seitz Valve Engine Systems
Other Type
MediaCompressed air according ISO 8573.1- Particles: Quality 5- Pressure of dew point: Quality 5- Oil content: Quality 3
MaterialValve body: Aluminium anodised Piston: Brass Seals: FPM (Viton)
Mounting positionArbitrary

Seitz Valve Engine Systems

Starting Valve with Slow Turn Type 2922 and 2875 

Starting Valve types 2922 and 2875 are valve combinations consisting of Main Starting Valve with integrated slow turn function. Twoange-mounted Solenoid Valves separately control the main starting and slow turn function.

Seitz Valve Engine Systems
Other Type
Material
  • Valve body: Aluminium anodised
  • Piston: Aluminium
  • Seals: FPM/NBR
MaterialValve body: Aluminium anodised Piston: Aluminium Seals: FPM/NBR
MediaCompressed air according ISO 8573.1- Particles: Quality 5- Dew point: Quality 5- Oil content: Quality 3
Operating pressureP1: 10 ... 30 bar

SEITZ VALVE
STARTING VALVE

Starting valve

Seitz Valve Engine Systems

Seitz Valve Starting Valve with Slow Turn Type 2922 and 2875 

Starting Valve types 2922 and 2875 are valve combinations consisting of Main Starting Valve with integrated slow turn function. Two ange-mounted Solenoid Valves separately control the main starting and slow turn function.

Seitz Valve Engine Systems
Other Type
Material
  • Valve body: Aluminium anodised
  • Piston: Aluminium
  • Seals: FPM/NBR
MaterialValve body: Aluminium anodised Piston: Aluminium Seals: FPM/NBR
MediaCompressed air according ISO 8573.1- Particles: Quality 5- Dew point: Quality 5- Oil content: Quality 3
Operating pressureP1: 10 ... 30 bar

SEITZ VALVE
STARTING VALVE

Starting valve