The SHAKO SPU225A-03 is a high-flow 3/8" 316 stainless steel 2/2 way normally closed solenoid valve for industrial fluid, water, air and compatible gas control applications.
Its pressure-assisted diaphragm design provides a large 13mm orifice and Kv flow factor of 40 L/min, making it suitable for applications where higher flow is required and a minimum 0.5 Bar pressure differential is available.
Manufactured from corrosion-resistant 316 stainless steel with stainless steel internals, the SPU225A-03 is particularly suitable for RO water, demineralised water, pure water, AdBlue, chemicals and other compatible aggressive or high-purity fluids. Options include WRAS approved EPDM seals, oxygen-service degreasing and ATEX-certified coils.
Valve Function & Operation
Function: 2/2 way normally closed
Operation: Pressure-assisted diaphragm
Minimum Operating Differential: 0.5 Bar
Operating Pressure: 0.5 to 10 Bar differential
Maximum Working Pressure: 15 Bar
The valve is closed when de-energised and opens when electrical power is applied to the solenoid coil.
Ports & Flow
Port Size: 3/8" BSPP female
Optional Threads: NPT or Rc
Orifice Size: 13.0mm
Kv Flow Factor: 40 L/min based on water with 1 Bar pressure drop
Construction & Materials
Body Material: 316 stainless steel
Internal Components: Stainless steel
Standard Seal: FKM (Viton®)
Optional Seals:
EPDM
NBR
HNBR
WRAS approved EPDM seal option available for potable water applications.
Shading Ring Options
Standard Shading Ring: Copper
Optional Silver Shading Ring: Suitable for AC or DC configurations
Optional No Shading Ring: DC operation, or AC supply using a suitable rectified AC-to-DC DIN connector
These alternative configurations can be useful for high-purity and chemically sensitive applications where copper contact with the controlled media is undesirable.
Media Compatibility
Air
Water
RO water
Demineralised water
Pure water
AdBlue
Light oils
Compatible chemicals
Compatible gases
Fluids up to 50 cSt viscosity
Material and seal compatibility should always be confirmed for the specific fluid, concentration and operating temperature.
Seal Options & Temperature Range
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
Maximum actual operating temperature may also be limited by the coil, pressure, media and application conditions.
Coil & Electrical Specification
Coil Power: 15 Watts
Insulation: Class H
Electrical Connection: DIN 43650 Form A
Protection: IP65 with connector fitted
Duty Rating: 100% continuous duty
Connector: Included
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 ATEX certified for use in potentially explosive atmospheres when supplied in the approved configuration.
✓ Maximum process pressure under SHAKO ATEX certificate: 15 kgf/cm²
✓ Current ATEX legislation: Directive 2014/34/EU
Oxygen-Cleaned / Degreased Option
An oxygen-cleaned/degreased version is available with oil and grease contamination removed for applications requiring enhanced cleanliness.
For oxygen applications, valve configuration, seal materials, pressure, temperature and cleanliness requirements must be confirmed as suitable for the intended service before use.
Typical Applications
Industrial process control
RO and reverse osmosis systems
Demineralised water systems
Pure water installations
Water treatment equipment
AdBlue dispensing and control
Chemical processing
Industrial air systems
Compatible gas control
OEM machinery
Clean fluid systems
Hazardous area installations with ATEX option
Oxygen and clean-gas applications with appropriate degreased configuration
