Description
1" Stainless Solenoid Valve – SHAKO SPU220A-08
The SHAKO SPU220A-08 is a high-flow 1" 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-08 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 large 25mm orifice provides approximately 183 L/min water flow at 1 Bar pressure differential. FKM (Viton) seals are fitted as standard, with NBR, EPDM and HNBR alternatives available. For AdBlue / DEF applications, select the EPDM seal configuration.
Valve Function & Operation
Function: 2/2 way normally closed
Operation: Zero-rated assisted lift
Construction: Diaphragm
Port size: 1" BSP
Optional threads: NPT or Rc
Orifice: 25mm
The SPU220A-08 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 operation 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
AC pressure range: Vacuum to 7 Bar
DC pressure range: Vacuum to 5 Bar
Vacuum capability: Up to 80% vacuum
Orifice size: 25mm
Flow rate: 183 L/min water @ 1 Bar ΔP
Opening / closing time: ≤50ms
The standard SPU220A-08 uses a 15W Class H solenoid operator and provides particularly high flow through its large 25mm assisted-lift diaphragm.
Construction & Materials
Body: 316 stainless steel
Tube: Stainless steel
Internal components: Stainless steel
Construction: Assisted-lift diaphragm
Orifice: 25mm
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 1.48kg
Seal & Media Selection
Correct seal selection is essential when using the SPU220A-08 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
For AdBlue / DEF applications, select the EPDM seal configuration rather than the standard FKM version.
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: 25mm
Flow rate: 183 L/min water @ 1 Bar ΔP
The large 25mm assisted-lift diaphragm gives the SPU220A-08 substantially greater flow capacity than the smaller SPU220 models while retaining zero-rated operation.
Unlike a conventional pilot-operated diaphragm valve, the assisted-lift design does not require a positive inlet-to-outlet differential pressure to initiate operation.
This makes the SPU220A-08 particularly useful for high-flow low-pressure water systems, tank applications, vacuum equipment and industrial processes where differential pressure may vary.
Coil & Electrical
Coil power: 15W
Insulation: Class H 180°C
Duty cycle: 100% continuous
Electrical connection: DIN43650A
Protection: IP65 with connector fitted
Coil construction: Thermoset resin
The standard 15W Class H operator provides maximum positive operating pressures of 7 Bar AC or 5 Bar DC.
Voltage Options
DC options include:
✓ 12V DC
✓ 24V DC
✓ 48V DC
✓ 110V DC
✓ 220V DC
AC options include:
✓ 12V AC
✓ 24V AC
✓ 48V AC
✓ 110V AC
✓ 240V AC
✓ 380V AC 50/60Hz
RO & Pure Water Options
The 316 stainless steel construction makes the SPU220A-08 particularly suitable for RO water, demineralised water and high-purity water applications.
Alternative operator configurations include:
✓ Silver shading ring option
✓ No shading ring for DC
✓ Rectified AC/DC configuration
The standard operator incorporates a copper shading ring. Where copper contact is undesirable, SHAKO offers a silver shading-ring operator for RO and pure-water applications or an operator without a shading ring for DC/rectified operation.
ATEX / IECEx Option
The SHAKO SPU220A Series is covered by ATEX Certificate Sira 09ATEX6180X. The certificate describes the SPU220A Series as comprising the solenoid, diaphragm assembly and stainless steel valve body.
Certified series marking:
✓ Sira 09ATEX6180X
✓ II 2 GD c T4 130°C
✓ ATEX Category 2G / 2D
nass magnet explosion-protected operator option:
✓ Ex mb IIC T4 Gb
✓ Ex mb tb IIIC T130°C Db
✓ ATEX Category 2G / 2D
✓ Gas Group IIC
✓ Dust Group IIIC
✓ PTB 03 ATEX 2086 X
✓ IECEx PTB 05.0005X
Maximum certified process fluid temperature: +80°C
Current ATEX legislation: Directive 2014/34/EU
Special Options
✓ NPT or Rc thread options
✓ NBR seal option
✓ EPDM seal option
✓ HNBR seal option
✓ Silver shading ring
✓ No shading ring option
✓ RO / pure water configuration
✓ AdBlue EPDM configuration
✓ Alternative coil voltages
✓ High-temperature configuration
✓ Degreased configuration
✓ Oxygen-cleaned configuration
✓ ATEX / IECEx coil option
Typical Applications
✓ RO water systems
✓ Demineralised water systems
✓ Pure water systems
✓ AdBlue / DEF with EPDM seals
✓ Vacuum systems
✓ Chemical process systems
✓ Corrosive fluid control
✓ High-flow water systems
✓ Water treatment equipment
✓ Air and gas control
✓ Light oil systems
✓ OEM machinery
✓ Industrial automation
High Flow Stainless Zero-Rated Design
The SHAKO SPU220A-08 combines corrosion-resistant 316 stainless steel construction with a large 25mm zero-rated assisted-lift diaphragm.
Its 25mm orifice provides approximately 183 L/min water flow at 1 Bar pressure differential, making this the highest-flow model within the four-size SPU220 range shown on the SHAKO technical sheet.
Despite its large flow capacity, the assisted-lift construction allows operation from zero positive pressure and under suitable vacuum conditions.
This makes the SPU220A-08 particularly useful for RO and demineralised water, chemical processing, vacuum equipment and high-flow industrial applications where brass construction may be unsuitable. For AdBlue / DEF service, the valve should be configured with EPDM seals.
The standard 15W Class H operator provides operation up to 7 Bar AC / 5 Bar DC. A separate high-pressure SPU220A-08H product is available where increased operating pressure is required.
Ordering Information
Select the required seal material, thread and voltage before adding the valve to your basket.
Available options include:
✓ 1" BSP thread
✓ Optional NPT or Rc threads
✓ FKM seals as standard
✓ NBR, EPDM or HNBR options
✓ EPDM configuration for AdBlue
✓ Standard 15W operator
✓ RO / pure water configuration
✓ High-temperature configuration
✓ Degreased configuration
✓ AC and DC voltage options
For AdBlue / DEF / AUS 32, select the EPDM seal configuration.
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 applications requiring higher positive operating pressure, select the separate high-pressure SPU220A-08H product.
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