Description
1/2 Inch High Pressure Brass Normally Open Solenoid Valve – Shako NOPU225H-04 (PU225HN-04)
A high-pressure pressure-assisted 2/2 way normally open brass solenoid valve designed for demanding fluid and gas control applications up to 25 Bar. The Shako NOPU225H-04 combines a forged brass body, stainless steel internals and reinforced diaphragm sealing to provide reliable operation on air, water, light oils and compatible gases where fail-open operation is required. Features include high-pressure capability, quick response and exceptional durability.
Valve Function & Operation
Function: 2/2 way normally open
Operation: Pressure assisted diaphragm design
Minimum operating pressure: 0.5 Bar differential
Port size: 1/2" BSPP
Optional threads: NPT or Rc
Pressure & Flow
Operating pressure: 0.5 to 25 Bar
Proof pressure: 30 Bar
Orifice size: 8.0 mm
Kv flow factor: 28.6 L/min
Based on water with 1 Bar pressure drop.
High-pressure operation with fail-open safety function.
Construction & Materials
Body: Forged brass
Internals: Stainless steel (SUS304)
Diaphragm design for high-pressure service
Seal material (standard): NBR with nylon reinforcement
Optional seals:
EPDM
FKM (Viton®)
HNBR
Media Compatibility
Suitable for:
Air
Water
Light oils
Neutral gases
Most compatible fluids and gases up to 50 CST
Temperature Limits
Media temperature:
NBR: -15°C to +80°C
HNBR: -40°C to +150°C
FKM: -10°C to +180°C
EPDM: -5°C to +130°C
Ambient temperature: -10°C to +60°C
Coil & Electrical
Coil: Nass Magnet System 13/36
Power consumption: 18.5 Watt
Connector: DIN 43650A
Insulation class: Class H
Duty cycle: 100% continuous rated
Protection rating: IP65 with connector fitted
Connector included.
Voltage Options
DC: 12V, 24V, 48V, 110V or 220V
AC: 12V, 24V, 48V, 110V, 230V or 380V (50/60 Hz)
Hazardous Area Option
ATEX Ex mb IIC T4
Temperature class: T4 (T130°C)
Certification:
- Ex mb IIC T4 Gb
- Ex mb tb IIIC T130°C Db
Suitable for Zones 21 & 22 hazardous areas.
Maximum pressure with ATEX coil: 20 Bar
Maximum media temperature with ATEX coil: +80°C
Benefits
Fail-open operation for safety-critical applications
High-pressure operation up to 25 Bar
Quick response diaphragm design
Reinforced diaphragm for long service life
Reliable operation on fluids and gases
Reduced operating noise with elastomer sealing
Free UK delivery available
Typical Applications
Fail-safe water systems
Compressed air installations
Industrial process control
Medical and healthcare equipment
Boiler and utility systems
Light oil and fuel systems
General industrial automation
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