Description
3/8" Stainless Solenoid Valve – SHAKO SPU220A-03
The SHAKO SPU220A-03 is a high-flow 3/8" 2/2 way normally closed zero-rated assisted-lift solenoid valve manufactured from corrosion-resistant 316 stainless steel.
Designed for compressed air, water, vacuum, light oils and compatible aggressive or high-purity process fluids, the SPU220A-03 is particularly suitable where brass construction is unsuitable.
The zero-rated assisted-lift diaphragm design allows operation from zero positive pressure while providing substantially greater flow capacity than a conventional direct acting valve. The valve is also suitable for vacuum service up to approximately 80% vacuum.
A 13mm orifice provides a water flow rate of approximately 35 L/min at 1 Bar pressure differential. FKM (Viton) seals are fitted as standard, with NBR, EPDM and HNBR alternatives available.
Valve Function & Operation
Function: 2/2 way normally closed
Operation: Zero-rated assisted lift
Construction: Diaphragm
Port size: 3/8" BSP
Optional threads: NPT or Rc
Orifice: 13mm
The SPU220A-03 is normally closed when electrically de-energised. Applying electrical power energises the solenoid operator and opens the valve.
Its assisted-lift construction combines direct mechanical lifting with diaphragm assistance, allowing the valve to operate from zero positive pressure without requiring the minimum differential pressure normally associated with conventional pilot-operated diaphragm valves.
The valve can also operate under suitable vacuum conditions.
Pressure & Performance
Standard 15W AC: 0 to 7 Bar
Standard 15W DC: 0 to 5 Bar
High-power 18.5W AC: 0 to 12 Bar
High-power 18.5W DC: 0 to 12 Bar
Vacuum capability: Up to 80% vacuum
Orifice size: 13mm
Flow rate: 35 L/min water @ 1 Bar ΔP
Opening / closing time: ≤50ms
Construction & Materials
Body: 316 stainless steel
Tube: Stainless steel
Internal components: Stainless steel
Construction: Assisted-lift diaphragm
Orifice: 13mm
Standard seal: FKM (Viton)
Optional seals:
✓ NBR
✓ EPDM
✓ HNBR
Standard shading ring: Copper
Optional shading ring: Silver
Optional: No shading ring
Installation: Coil upright
Net weight: Approximately 0.74kg
Seal & Media Selection
Correct seal selection is essential when using the SPU220A-03 with different fluids and temperatures.
FKM (Viton) – Standard:
✓ -10°C to +180°C
✓ Oils and fuels
✓ Many process fluids
✓ Higher temperatures
NBR:
✓ -15°C to +80°C
✓ Air
✓ Water
✓ Neutral gases
✓ Mineral oils
HNBR:
✓ -40°C to +150°C
✓ Air
✓ Water
✓ Oils
✓ Low-temperature service
EPDM:
✓ -5°C to +130°C
✓ Water
✓ Hot water
✓ AdBlue / DEF / AUS 32
✓ Suitable aqueous fluids
Always confirm chemical compatibility before using the valve with aggressive chemicals, fuels, oxygen or unusual process fluids.
Media Temperature
The maximum media temperature is determined by the selected seal material and suitable solenoid operator.
FKM (Viton): -10°C to +180°C
NBR: -15°C to +80°C
EPDM: -5°C to +130°C
HNBR: -40°C to +150°C
Overall available range: -40°C to +180°C
Flow Performance
Orifice size: 13mm
Flow rate: 35 L/min water @ 1 Bar ΔP
The 13mm assisted-lift diaphragm provides high flow capacity from a compact 3/8" stainless steel valve.
Unlike conventional pilot-operated diaphragm valves, the zero-rated assisted-lift construction does not require a positive inlet-to-outlet pressure differential to initiate operation.
This makes the SPU220A-03 particularly useful for low-pressure water systems, tank applications, vacuum equipment and process systems where differential pressure may vary.
Coil & Electrical
Standard coil power: 15W
High-power option: 18.5W
Insulation: Class H 180°C
Duty cycle: 100% continuous
Electrical connection: DIN43650A
Protection: IP65 with connector fitted
Coil construction: Thermoset resin
The standard 15W operator provides operation up to 7 Bar AC / 5 Bar DC, while the optional 18.5W operator increases the maximum positive operating pressure to 12 Bar AC/DC.
Voltage Options
15W operator:
✓ 12V DC
✓ 24V DC
✓ 48V DC
✓ 110V DC
✓ 220V DC
✓ 12V AC
✓ 24V AC
✓ 48V AC
✓ 110V AC
✓ 240V AC
✓ 380V AC
18.5W operator:
✓ 12V DC
✓ 24V DC
✓ 48V DC
✓ 110V DC
✓ 220V DC
✓ 24V AC
✓ 48V AC
✓ 110V AC
✓ 230V AC
RO & Pure Water Options
The 316 stainless steel construction makes the SPU220A-03 particularly suitable for RO water, demineralised water and high-purity water applications.
For these applications, alternative operator configurations are available:
✓ Silver shading ring option
✓ No shading ring for DC
✓ Rectified AC/DC configuration
The standard operator uses a copper shading ring. For applications where copper contact or contamination is undesirable, SHAKO specifically offers a silver shading-ring operator for RO and pure water, or an operator without a shading ring for DC/rectified operation.
Hazardous Area Option
An optional nass magnet explosion-protected solenoid operator can be supplied for suitable hazardous-area applications.
✓ Ex mb IIC T4 Gb
✓ Ex mb tb IIIC T130°C Db
✓ ATEX Category 2G / 2D
✓ Gas Group IIC
✓ Dust Group IIIC
✓ IP65 protection
✓ Maximum media temperature +80°C
✓ Maximum pressure 3 Bar
nass magnet ATEX certificate: PTB 03 ATEX 2086 X
nass magnet IECEx certificate: IECEx PTB 05.0005X
IMPORTANT: The SHAKO SPU220 bodies are ATEX-certified as per Sira 09ATEX6180X.
Special Options
✓ NPT or Rc thread options
✓ NBR seal option
✓ EPDM seal option
✓ HNBR seal option
✓ 18.5W high-power coil
✓ Silver shading ring
✓ No shading ring option
✓ RO / pure water configuration
✓ Alternative coil voltages
✓ High-temperature configuration
✓ Degreased configuration
✓ Oxygen-cleaned configuration
Typical Applications
✓ RO water systems
✓ Demineralised water systems
✓ Pure water systems
✓ AdBlue systems
✓ Vacuum systems
✓ Chemical process systems
✓ Corrosive fluid control
✓ Industrial water systems
✓ Air and gas control
✓ Light oil systems
✓ OEM machinery
✓ Industrial automation
High Flow Stainless Zero-Rated Design
The SHAKO SPU220A-03 combines corrosion-resistant 316 stainless steel construction with a high-flow zero-rated assisted-lift diaphragm design.
Its 13mm orifice provides approximately 35 L/min water flow at 1 Bar pressure differential, while the assisted-lift operating principle allows the valve to function from zero positive pressure.
This makes the valve particularly useful for RO and demineralised water, chemical processing, vacuum equipment, AdBlue systems and applications where brass construction may be unsuitable.
The standard FKM seals provide excellent temperature and fluid compatibility for many industrial applications, while optional NBR, EPDM and HNBR seals allow the valve to be configured for different process requirements.
The standard 15W operator provides operation up to 7 Bar AC / 5 Bar DC, while the optional 18.5W high-power operator increases positive pressure capability to 12 Bar AC/DC.
Ordering Information
Select the required seal material, thread, voltage and pressure configuration before adding the valve to your basket.
Available options include:
✓ 3/8" BSP thread
✓ Optional NPT or Rc threads
✓ FKM seals as standard
✓ NBR, EPDM or HNBR options
✓ Standard 15W configuration
✓ High-power 18.5W configuration
✓ RO / pure water configuration
✓ High-temperature configuration
✓ Degreased configuration
✓ AC and DC voltage options
For RO or demineralised water, consider the silver shading-ring or no-shading-ring operator configuration.
For oxygen service, specify the appropriate degreased configuration and confirm application requirements before ordering.
For aggressive chemicals, fuels or unusual process media, confirm material and seal compatibility before ordering.
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