Key Features

✓ 1/2" BSP Forged Brass Body
✓ 2/2 Way Normally Closed
✓ Zero-Rated Assisted Lift
✓ Zero Positive Pressure Start
✓ Suitable for Vacuum Service
✓ Large 13mm Flow Orifice
✓ High Flow Diaphragm Design
✓ Up to 8.5 Bar AC Pressure
✓ Up to 5 Bar DC Pressure
✓ Stainless Steel Valve Stem
✓ NBR Seal as Standard
✓ FKM, EPDM or HNBR Options
✓ Media Range -40°C to +180°C
✓ 100% Continuous Duty Coil
✓ Class H Solenoid Operator
✓ IP65 DIN Electrical Connection
✓ BSP or Optional NPT Thread
✓ Optional ATEX Coil Available
✓ ATEX Pressure Limited to 3 Bar
✓ ATEX Zone 1 Gas / Zone 21 Dust

1/2" Brass Solenoid Valve 0-8.5 Bar 2/2 Way Normally Closed

★★★★★ 4.5 / 5 (8 reviews)

£72.34 incl. VAT £60.28 ex. VAT

-19% Was £89.23 incl. VAT

Brand: Shako Co Ltd

Model: PU22004

Stock: 687 in stock

Read Full Description

Description

1/2" Brass Assisted Lift Solenoid Valve – SHAKO PU220A-04


The SHAKO PU220A-04 is a high-flow 1/2" 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 13mm orifice, the PU220A-04 provides substantially greater flow capacity than conventional compact direct acting solenoid valves 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-04 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: 1/2" BSP
Optional thread: NPT
Orifice: 13mm
Effective area: 76mm²
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-04 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 8.5 Bar
DC pressure range: Vacuum to 5 Bar
Vacuum capability: Up to 80% vacuum
Maximum vacuum: Approximately -0.8 Bar
Not suitable between: -0.1 and +0.1 Bar
Orifice size: 13mm
Effective area: 76mm²
Flow rate: 35 L/min water @ 1 Bar ΔP
The large 13mm orifice provides high 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: 13mm
Effective area: 76mm²
Standard seal: NBR
Optional seals:
✓ FKM (Viton)
✓ EPDM
✓ HNBR
Installation: Horizontal
Net weight: Approximately 740g

Seal & Media Selection

Correct seal selection is essential when using the PU220A-04 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: 13mm
Effective area: 76mm²
Flow rate: 35 L/min water @ 1 Bar ΔP
The large diaphragm and 13mm valve orifice provide high flow capacity from a compact 1/2" valve.
Unlike a conventional pressure-assisted diaphragm valve, the assisted-lift construction allows operation from zero positive pressure, making the PU220A-04 particularly useful for tank discharge, low-pressure water systems, vacuum equipment and applications where differential pressure cannot always be guaranteed.

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-04 combines the high flow capability of a diaphragm valve with assisted-lift operation from zero positive pressure.
Its large 13mm orifice provides substantially greater flow capacity than smaller direct acting solenoid valves, while the mechanically assisted diaphragm allows the valve to operate where conventional pilot-operated valves may fail because insufficient pressure differential is available.
This makes the PU220A-04 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, FKM, EPDM and HNBR seal options allow the valve to be configured for a wide variety of compatible media.
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 the 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:
✓ 1/2" BSP thread
✓ Optional 1/2" 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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View Technical Specification

Technical Specification

Brand: Shako Co Ltd

Model: PU22004

Width: 48.00 mm

Height: 101.00 mm

Depth: 66.50 mm

Weight: 0.74 kg

Valve / Product Type: Solenoid Valve

Body Material: Brass

Voltage: 110vAC, 110vDC, 12vDC, 200vDC, 230VAC, 24vAC, 24vDC, 380vAC, 48vAC, 48vDC

Port Size: 1/2 thread

Function: 2/2 Failsafe Closed

Operation: Assisted Lift

Seals: EPDM, HNBR, NBR, FKM (Viton)

Approvals:: ATEX Exm, IP65

Media: Air, Fluid (Non Aggressive), Gases (Non Aggressive), Oils + Fuels 50cSt Max, Vacuum (Low), Vacuum (Medium), Water

Options required: Degreased

Orifice: 13mm

Pressure: Vacuum, 0.2 Bar (200 mBar), 0.3 Bar (300 mBar), 0.4 Bar (400 mBar), 0.5 Bar (500 mBar), 0.6 Bar (600 mbar), 0.7 Bar (700 mBar), 0.8 Bar (800 mBar), 1 Bar, 1.2 Bar, 1.3 Bar, 1.4 Bar, 1.5 Bar, 1.6 Bar, 2 Bar, 2.5 Bar, 3 Bar, 3.5 Bar, 4 Bar, 4.5 Bar, 5 Bar, 5.5 Bar, 6 Bar, 6.5 Bar, 7 Bar, 7.5 Bar, 8 Bar, 8.5 Bar

Reviews

★★★★★4.5 / 5 8 reviews

★★★★★

Great general purpose valve and a good price. Used on my gravity fed tank system and work a treat!!

Reviewed on 14/05/2014 by Steven

★★★★★

15mm water Solenoid valve arrived next day, installed and is working perfectly. Nice to see it did come with coil and connector, well made strong and reliable. Thanks. Allan.

Reviewed on 02/02/2015 by Allan

★★★★★

needed a 15mm brass solenoid valve with EPDM seals for mains water, your option for high power coil giving higher working pressure range is ideal especially as we have pumped closed loop system. Thanks. A++ recommended. Phil.

Reviewed on 08/06/2015 by Phil G

★★★★★

Well worth a review. Valve arrived next day, ETA tracking notification was very helpful. Valve installed on vacuum system and worked perfectly straight out of the box and it was half the price of the Asso one that it replaced which was on a 4 week delivery time anyway. Ta. R.B.

Reviewed on 15/01/2016 by Rich Bailey

★★★★★

Reçu rapidement, je n'^hésiterai pas à recommander sur ce site.

Reviewed on 29/04/2016 by Denis

★★★★★

Very helpful sales team very knowledgable too. Good product arrived quickly would recommend.

Reviewed on 11/10/2016 by Surtees

★★★★★

Easy order process and valves arrived the following afternoon. I like the customer service and especially the quality of the valve, well marked and including the coil and connector. BSP thread well machined and finished, good body design very robust, coil 100% rated and CE marked from German origin thus approved for UK market. I particularly good result on the ROHS compliance test I did, you are under the EU RoHS limits: of Pb is 1000ppm, Hg is 1000ppm and Cd is 100ppm. Thank you for your support and attention to detail. Pete.

Reviewed on 15/12/2016 by Cornford. P.

★★★★★

Good fast delivery thank you will use again

Reviewed on 24/05/2020 by Mia Mather

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