Nuclear Power Plants
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
Detail Specification
| Operating system | Pilot operated with system media fluid |
| Function | 3-way, NC |
| Fluid | Air / Nitrogen |
| Nominal diameter | 14 mm (0.55 in) |
| Ambient temperature | Max. 40°C (104°F) |
| Pressure range | 1 to 9 bar (15 to 131 psig) |
| Flow coefficient Kv (Cv) | 3.44 (4.00) |
| Leakage | Max. 1.4 Nl/h (23.6 scc/min.) |
| Weight | 0.970 kg (2.14 lbs) |
| Material | Body: Aluminum Ti-anodized Elastomers: FKM |
| Response time | at 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
Detail Specification
| Operating system | Pilot operated with system media fluid |
| Function | 2-way, NC |
| Fluid | Demineralized water |
| Nominal diameter | 7 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 pressure | 0.45 bar (6.5 psig) |
| Max. differential pressure | 137 bar (1987 psig) |
| Testing overpressure | 207 bar (3002 psig) |
| Design temperature | 138°C (280.4°F) |
| Open/Close time | < 50 ms / < 400 ms) |
| Pressure range | 6 to 138 bar (87 to 2002 psig) |
| Ambient temperature | 4.4 to 49°C (40 to 120°F) |
| Leakage | Max. 0.12 Nl/h (2 scc/min) |
| Weight | 2.8 kg with throttle (6.2 lbs)2.6 kg w/o throttle (5.7 lbs) |
| Material | Body: 316L (EN 1.4435)Elastomers: FKM |
| Mounting Details (SIL No.678. Nov. 30th 2015) | 4 x cap screws with GEOMET 500® coating |
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
Detail Specification
| Operating system | Pilot operated with system media fluid |
| Function | 2-way, NC |
| Fluid | Demineralized water |
| Nominal diameter | 7 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 pressure | 0.45 bar (6.5 psig) |
| Max. differential pressure | 137 bar (1987 psig) |
| Testing overpressure | 207 bar (3002 psig) |
| Design temperature | 138°C (280.4°F) |
| Open/Close time | < 50 ms / < 400 ms) |
| Pressure range | 6 to 138 bar (87 to 2002 psig) |
| Ambient temperature | 4.4 to 49°C (40 to 120°F) |
| Leakage | Max. 0.12 Nl/h (2 scc/min) |
| Weight | 2.8 kg with throttle (6.2 lbs)2.6 kg w/o throttle (5.7 lbs) |
| Material | Body: 316L (EN 1.4435)Elastomers: FKM |
| Mounting Details (SIL No.678. Nov. 30th 2015) | 4 x cap screws with GEOMET 500® coating |
Engine Systems
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
Detail Specification
| Media | Compressed air according ISO 8573.1- Particles: Quality 5- Pressure of dew point: Quality 5- Oil content: Quality 3 |
| Material | Valve body: Aluminium anodised Piston: Brass Seals: FPM (Viton) |
| Mounting position | Arbitrary |
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. 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
Detail Specification
| Material | Valve body: Aluminium anodised Piston: Aluminium Seals: FPM/NBR |
| Media | Compressed air according ISO 8573.1- Particles: Quality 5- Dew point: Quality 5- Oil content: Quality 3 |
| Operating pressure | P1: 10 ... 30 bar |
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
Detail Specification
| Material | Valve body: Aluminium anodised Piston: Aluminium Seals: FPM/NBR |
| Media | Compressed air according ISO 8573.1- Particles: Quality 5- Dew point: Quality 5- Oil content: Quality 3 |
| Operating pressure | P1: 10 ... 30 bar |
