Description
1¼" Stainless Steel Normally Open Solenoid Valve – NOSPU225A-12
The Shako NOSPU225A-12 is a 2/2 way normally open pressure-assisted stainless steel solenoid valve designed for reliable high-flow control of air, water, oils, gases and compatible industrial fluids.
Manufactured from 316 stainless steel with a large 38mm orifice, the valve provides a high Kv flow factor of 367 L/min and operates across a 0.5 to 10 Bar differential pressure range.
The valve remains open when electrically de-energised and closes when the coil is energised, making it particularly suitable for applications where flow must continue following loss of electrical power. WRAS-approved EPDM seals, oxygen-degreased preparation and ATEX/IECEx hazardous-area configurations are also available.
Valve Function & Operation
Function: 2/2 way normally open
Operation: Pressure assisted
De-energised position: Open
Energised position: Closed
Minimum operating pressure: 0.5 Bar differential
Differential pressure range: 0.5 to 10 Bar
Maximum working pressure: 15 Bar
Ports & Flow
Port size: 1¼" BSPP
Optional threads: NPT or Rc
Orifice size: 38.0mm
Kv flow factor: 367 L/min
Based on water with 1 Bar pressure drop.
Construction & Materials
Body: 316 stainless steel
Internal components: Stainless steel
Standard seals: FKM (Viton)
Optional seals:
EPDM
NBR
HNBR
WRAS-approved EPDM seal option available
Standard shading ring: Copper
Optional silver shading ring available for AC or DC operation.
Optional without shading ring for DC operation, or AC supply using a DC coil with a rectified DIN connector.
The alternative shading-ring configurations make the valve particularly suitable for RO water, demineralised water, pure water and AdBlue applications.
Media Compatibility
✓ Air
✓ Water
✓ Pure water
✓ Reverse osmosis (RO) water
✓ Demineralised water
✓ Light oils
✓ AdBlue
✓ Compatible gases
✓ Compatible fluids below 50 cSt
For unusual or aggressive fluids, confirm seal and material compatibility before use.
Temperature Limits
NBR: -15°C to +80°C
FKM (Viton): -10°C to +180°C
EPDM: -5°C to +130°C
HNBR: -40°C to +150°C
Actual operating temperature depends on the selected seal material, coil configuration and application conditions.
Coil & Electrical
Coil power: 15 Watt
Insulation: Class H
Electrical connection: DIN43650A
Protection: IP65 with connector included
Duty cycle: 100% continuous duty
Voltage Options
DC:
6V DC
12V DC
24V DC
48V DC
110V DC
220V DC
AC 50/60Hz:
12V AC
24V AC
36V AC
48V AC
110V AC
230V AC
380V AC
ATEX / IECEx Certified Valve & Coil Option
The SHAKO SPU225A stainless steel valve series is available in an ATEX-certified configuration for use in potentially explosive atmospheres.
✓ SHAKO SPU225A valve ATEX certificate: Sira 09ATEX6180X
✓ Valve marking: II 2 GD c T4 130°C
✓ ATEX Category: 2G / 2D
✓ nass magnet explosion-protected solenoid operator
✓ Coil protection: Ex mb IIC T4 Gb
✓ Dust protection: Ex mb tb IIIC T130°C Db
✓ nass magnet ATEX certificate: PTB 03 ATEX 2086 X
✓ nass magnet IECEx certificate: IECEx PTB 05.0005X
✓ Maximum process fluid temperature: +80°C
✓ Maximum process pressure under SHAKO ATEX certificate: 15 kgf/cm²
✓ Current ATEX legislation: Directive 2014/34/EU
WRAS Approved Option
A WRAS-approved EPDM sealing option is available for potable water applications.
This combines the corrosion resistance of the 316 stainless steel valve body and internals with an approved EPDM sealing configuration for drinking-water and potable-water systems.
Oxygen Service Option
The NOSPU225A-12 can be supplied specially degreased with oil and grease contamination removed for oxygen and clean-gas applications.
✓ Degreased valve preparation available
✓ Suitable for oxygen service when correctly specified
✓ 316 stainless steel construction
✓ Alternative shading-ring configurations available
Seal material, pressure, temperature and electrical configuration should be selected specifically for the oxygen application.
Typical Applications
Industrial process control
Potable water systems with WRAS option
Water treatment and filtration
RO and demineralised water systems
Pure water systems
Chemical and fluid handling
AdBlue systems
Fail-open cooling water systems
Priority demand systems
Oxygen and clean-gas service
Hazardous-area installations
Industrial automation
Technical Information
Model: NOSPU225A-12
Function: 2/2 way normally open
Operation: Pressure assisted
Port: 1¼" BSPP
Orifice: 38mm
Kv flow factor: 367 L/min
Pressure: 0.5–10 Bar differential
Maximum working pressure: 15 Bar
Body: 316 stainless steel
Coil: 15 Watt Class H
Protection: IP65
Duty: 100%
HS Code: 84818030
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