Description
1" Brass Assisted Lift Solenoid Valve – SHAKO PU220A-08
The SHAKO PU220A-08 is a high-flow 1" 2/2 way normally closed zero-rated assisted-lift brass solenoid valve designed for control of compressed air, water, vacuum, light oils and compatible gases and process fluids.
Combining an assisted-lift diaphragm with a large 25mm orifice, the PU220A-08 provides excellent flow capacity while retaining operation from zero positive pressure.
The valve can also operate under vacuum conditions, making it particularly versatile for OEM machinery, vacuum equipment, industrial automation, water systems and general fluid control applications where differential pressure cannot always be guaranteed.
Manufactured from forged brass with stainless steel internal components, the PU220A-08 is supplied with NBR seals as standard, with FKM (Viton), EPDM or HNBR alternatives available. Media temperatures from -40°C up to +180°C can be accommodated according to the selected seal material and suitable solenoid operator.
Valve Function & Operation
Function: 2/2 way normally closed
Operation: Zero-rated assisted lift
Construction: Diaphragm
Port size: 1" BSP
Optional thread: NPT
Orifice: 25mm
Effective area: 220mm²
The assisted-lift design combines direct mechanical lifting with diaphragm assistance, allowing the valve to operate from zero positive pressure while providing a substantially larger flow path than a conventional direct acting valve.
This makes the PU220A-08 particularly suitable for systems where little or no pressure differential is available at start-up.
The valve can also be used for suitable vacuum applications.
Pressure & Performance
AC pressure range: Vacuum to 7 Bar
DC pressure range: Vacuum to 5 Bar
Vacuum capability: Up to 80% vacuum
Maximum vacuum: Approximately -0.8 Bar
Orifice size: 25mm
Effective area: 220mm²
Flow rate: 183 L/min water @ 1 Bar ΔP
The large 25mm orifice provides excellent flow capacity while the assisted-lift construction allows operation from zero positive pressure.
Construction & Materials
Body: Forged brass
Internals: Stainless steel
Valve stem: Stainless steel
Construction: Assisted-lift diaphragm
Orifice: 25mm
Effective area: 220mm²
Standard seal: NBR
Optional seals:
✓ FKM (Viton)
✓ EPDM
✓ HNBR
Installation: Horizontal
Net weight: Approximately 1485g
Seal & Media Selection
Correct seal selection is essential when using the PU220A-08 with different fluids and temperatures.
NBR – Standard:
✓ -15°C to +80°C
✓ Air
✓ Water
✓ Neutral gases
✓ Mineral oil
FKM (Viton):
✓ -10°C to +180°C
✓ Fuel oil
✓ Gasoline / petrol
✓ High-test gasoline
✓ Diesel fuel
HNBR:
✓ -40°C to +150°C
✓ Air
✓ Water
✓ Gear oil
✓ Engine oil
EPDM:
✓ -5°C to +130°C
✓ Hot water
✓ Detergent liquids
Always confirm chemical compatibility of the selected seal and valve materials before use with fuels, gases, oils or specialist process fluids.
Media Temperature
The maximum media temperature is determined by the selected seal material and suitable solenoid operator.
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
Overall available range: -40°C to +180°C
Flow Performance
Orifice size: 25mm
Effective area: 220mm²
Flow rate: 183 L/min water @ 1 Bar ΔP
The large diaphragm and 25mm valve orifice provide significantly increased flow capacity compared with the smaller PU220A models.
Unlike a conventional pressure-assisted diaphragm valve, the assisted-lift construction allows operation from zero positive pressure, making the PU220A-08 particularly useful for tank discharge, gravity-fed water systems, vacuum equipment and applications where differential pressure cannot always be guaranteed.
The combination of a full 25mm orifice and 1" connection makes this version particularly suitable where higher flow capacity is required without sacrificing zero-rated operation.
Coil & Electrical
Standard coil power: 15W
Insulation: Class H
Duty cycle: 100% ED
Electrical connection: DIN43650A
Protection: IP65 with connector fitted
A range of solenoid operators is available to suit different voltages, temperatures and application requirements.
Voltage Options
DC options include:
✓ 12V DC
✓ 24V DC
✓ 48V DC
✓ 110V DC
✓ 220V DC
AC options include:
✓ 12V AC
✓ 24V AC
✓ 36V AC
✓ 48V AC
✓ 110V AC
✓ 230V AC
✓ 380V AC 50/60Hz
ATEX Hazardous Area Option
An optional explosion-protected solenoid operator is available for hazardous-area installations.
✓ Ex mb IIC T4 Gb
✓ Ex mb tb IIIC T130°C Db
✓ Zone 1 gas / Zone 21 dust
✓ ATEX Category 2G / 2D
✓ Gas Group IIC
✓ Dust Group IIIC
✓ IP65 protection
✓ 100% continuous duty
✓ Ambient -20°C to +50°C
✓ Maximum media temperature +80°C
✓ Maximum pressure 3 Bar
IMPORTANT: Maximum operating pressure is restricted to 3 Bar when the ATEX explosion-protected coil is fitted.
Special Options
✓ NPT thread option
✓ FKM seal option
✓ EPDM seal option
✓ HNBR seal option
✓ Alternative coil voltages
✓ High-temperature configuration
✓ Optional timer control
✓ ATEX hazardous-area option
Typical Applications
✓ Vacuum systems
✓ Zero-pressure water systems
✓ Tank and vessel drainage
✓ Pneumatic control systems
✓ Air and gas control
✓ Industrial water systems
✓ Cooling water systems
✓ Light oil control
✓ OEM machinery
✓ Industrial automation
✓ Process fluid control
High Flow Zero-Rated Design
The SHAKO PU220A-08 combines the high flow capability of a large diaphragm valve with assisted-lift operation from zero positive pressure.
Its large 25mm orifice and 220mm² effective area provide significantly greater flow capacity than the smaller PU220A models, making the PU220A-08 particularly suitable where high flow is required through a 1" connection.
The mechanically assisted diaphragm allows the valve to operate where conventional pilot-operated valves may fail because insufficient pressure differential is available. This makes it particularly useful for tank outlets, gravity-fed water systems, vacuum equipment, low-pressure systems and industrial applications where pressure conditions can vary during operation.
The forged brass body and stainless steel internal components provide robust industrial construction, while NBR seals are supplied as standard. Optional FKM, EPDM and HNBR seals allow the valve to be configured for different compatible media and temperatures.
When fitted with the appropriate solenoid operator, the available media temperature range extends from -40°C with HNBR seals up to +180°C with FKM seals.
An optional ATEX explosion-protected configuration is also available for hazardous-area applications, with maximum operating pressure restricted to 3 Bar and maximum media temperature restricted to +80°C.
Ordering Information
Select the required seal material, thread, voltage and electrical configuration before adding the valve to your basket.
Available options include:
✓ 1" BSP thread
✓ Optional 1" NPT thread
✓ NBR seals as standard
✓ FKM, EPDM or HNBR seal options
✓ High-temperature configurations
✓ AC and DC voltage options
✓ Optional ATEX configuration
For high-temperature operation, select the appropriate seal and solenoid operator combination.
For ATEX applications, maximum operating pressure is 3 Bar and maximum media temperature is +80°C.
For fuels, oxygen, aggressive chemicals or unusual process media, contact us before ordering so that material compatibility and the correct valve configuration can be confirmed.
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