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Key Features

  • WRAS approved EPDM seals
  • WRAS Approval 2304324
  • 2/2 way normally open
  • De-energised open / energised closed
  • Pressure-assisted diaphragm
  • Anti-water-hammer design
  • Approx. 2.5 sec open / close
  • Large 38mm orifice
  • Kv flow 367 L/min
  • 0.5–10 Bar differential
  • 15 Bar maximum working pressure
  • Brass body
  • Stainless steel internals
  • -5°C to +130°C media
  • IP65 coil & connector included
  • Class H 180°C coil insulation
  • 100% continuous duty
  • AC & DC voltage options
  • Optional ATEX / IECEx coil
  • Optional low-power 24VDC connector
  • Suitable for priority demand systems
  • Suitable for sprinkler systems
  • Replacement seals & coils available
  • Free UK delivery

Datasheets

Description

1¼" High Flow WRAS Normally Open Water Solenoid Valve – PU225DN-12


WRAS Approved SHAKO Normally Open Brass Water Solenoid Valve

The SHAKO PU225DN-12 is a 1¼" WRAS approved brass normally open solenoid valve designed for potable water, priority demand, sprinkler and high-flow water control applications.

This 2/2 way pressure-assisted diaphragm valve remains open when de-energised and closes when electrical power is applied. Its normally open design is particularly useful where water flow is required to resume automatically following loss of electrical power.

Featuring a large 38mm orifice with a Kv flow factor of 367 L/min, the PU225DN-12 provides very high flow capacity. Its anti-water-hammer design and approximately 2.5-second operating time help reduce hydraulic shock in larger pipework systems.

Typical Applications

Potable water systems
Priority demand valve systems
Fire sprinkler installations
Water treatment equipment
Commercial building services
Industrial water management
Irrigation systems
OEM machinery
High-flow process water systems
Normally open water control systems

Technical Specification

Function: 2/2 way normally open
Fail Position: Open when de-energised
Energised Position: Closed
Operation: Pressure-assisted diaphragm
Design: Anti-water-hammer
Minimum Differential Pressure: 0.5 Bar
Operating Differential: 0.5 to 10 Bar
Maximum Working Pressure: 15 Bar
Opening / Closing Time: Approx. 2.5 seconds
Port Size: 1¼" BSPP female
Optional Thread: NPT
Orifice Size: 38mm
Kv Flow Factor: 367 L/min based on water with 1 Bar pressure drop
Body Material: Brass
Internal Components: Stainless steel
Seal Material: WRAS approved EPDM
Suitable Media: Potable water and compatible water-based fluids
Media Temperature: -5°C to +130°C

Coil & Electrical Specification

Coil: Nass Magnet system
Coil Power: 15 Watts
Insulation Class: Class H 180°C
Duty Rating: 100% continuous duty
Protection Rating: IP65 with connector
Electrical Connection: DIN 43650 Form A
Connector: Included

Voltage Options

DC: 12V, 24V, 48V, 110V or 220V
AC 50/60Hz: 12V, 24V, 36V, 48V, 110V, 230V or 380V

ATEX / IECEx Coil Option

Optional Nass Magnet explosion-protected solenoid operator available.
✓ Ex mb IIC T4 Gb
✓ Ex mb tb IIIC T130°C Db
✓ Suitable for Zone 1 gas and Zone 21 dust
✓ ATEX Category 2G / 2D
✓ Protection rating: IP65
✓ Maximum media temperature: +80°C
✓ ATEX Certificate: PTB 03 ATEX 2086 X
✓ IECEx Certificate: IECEx PTB 05.0005X
✓ ATEX Directive: 2014/34/EU

WRAS Approval

EPDM seals and gaskets are WRAS approved for potable water applications.
WRAS Approval: 2304324

Why Choose a Normally Open Solenoid Valve?

A normally open solenoid valve remains open without electrical power and closes when energised. If power is removed, the PU225DN-12 automatically returns to its open position.

This makes it useful for high-flow water systems where flow should be maintained or restored following loss of electrical power, including certain priority demand, sprinkler, cooling and process-water applications.

For safety-critical installations, the complete valve, controller and system configuration should be selected to meet the requirements of the application.
HS Code: 84818030

Related Products & Categories


11/4" WRAS Approved Valves

11/4" Brass Solenoid Valves

Replacement Solenoid Coils
View Technical Specification

Technical Specification

Brand: Shako Co Ltd

Model: PU225DN12

Width: 96.00 mm

Height: 145.50 mm

Depth: 131.00 mm

Weight: 2.82 kg

Valve / Product Type: Solenoid Valve

Body Material: Brass

Voltage: 110vAC, 110vDC, 12vDC, 200vDC, 230VAC, 24vAC, 24vDC, 36vAC, 380vAC, 48vAC, 48vDC

Port Size: 11/4 thread

Function: 2/2 Failsafe Open

Operation: Pressure Assisted

Seals: EPDM

Approvals:: ATEX Exm, IP65, WRAS

Media: Water

Options required: Anti Water Hammer

Orifice: 38mm

Pressure: 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, 9 Bar, 10 Bar, 12 Bar, 13 Bar, 14 Bar, 15 Bar

Found in these Categories

11/4 Water Solenoid Valve 0.5-15 Bar WRAS 2/2 Normally Open

£242.54 incl. VAT £202.12 ex. VAT

-35% Was £373.14 incl. VAT
Add To Cart

Brand: Shako Co Ltd

Model: PU225DN12

Stock: 71 in stock

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