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Key Features

  • 1¼" BSP female port
  • WRAS approved EPDM seals for potable water
  • 2/2 way latching / bi-stable operation
  • Remains open or closed without continuous power
  • Ultra-low energy consumption
  • Short 10–20ms operating pulse
  • Polarity reversing open / close control
  • Pressure-assisted diaphragm design
  • 0.5 to 10 Bar operating pressure differential
  • 15 Bar maximum working pressure
  • Large 38mm high-flow orifice
  • High flow Kv 367 L/min
  • Anti-water-hammer design
  • Brass body with stainless steel internals
  • 3–9V DC or 9–15V DC operating ranges
  • IP65 protection with connector supplied
  • Ideal for battery and remote water control systems
  • Suitable for smart water and automatic shut-off systems
  • Zero electrical power required to hold valve position
  • Free UK delivery available

Datasheets

Description

1¼" WRAS Latching Brass Solenoid Valve – LPU225D-12


The LPU225D-12 is a high-flow 1¼" WRAS approved brass latching solenoid valve designed for ultra-low power potable water control applications.

This 2/2 way bi-stable solenoid valve uses short electrical pulses to open and close and requires no continuous electrical power to maintain either position. 

Once operated, the valve remains in its last position without power until an opposite-polarity pulse is applied.

Featuring a large 38mm orifice, Kv flow factor of 367 L/min and WRAS approved EPDM seals, the LPU225D-12 provides high-capacity water control with exceptionally low energy consumption. It is particularly suited to battery-powered systems, remote water isolation, smart water management, metering and automatic shut-off applications.

Valve Function & Operation

Function: 2/2 way latching / bi-stable
Operation: Pressure-assisted diaphragm
Minimum Operating Differential: 0.5 Bar
Unlike a conventional continuously energised solenoid valve, the LPU225D-12 requires only a short electrical pulse to change position. The valve then remains mechanically latched in its last position without further electrical power.

Latching Control Logic

Stay Closed: Negative terminal 1 / positive terminal 2
Stay Open: Positive terminal 1 / negative terminal 2
Pulse Duration: 10–20ms
Hold Power: None required
The valve remains in its last position when electrical power is removed.

Ports & Flow

Port Size: 1¼" BSP female
Optional Thread: NPT
Orifice Size: 38.0mm
Kv Flow Factor: 367 L/min based on water with 1 Bar pressure drop
The large 38mm orifice provides excellent flow capacity for larger water systems while retaining the extremely low energy requirements of latching solenoid operation.

Pressure & Performance

Operating Pressure: 0.5 to 10 Bar differential
Maximum Working Pressure: 15 Bar
Opening / Closing Time: Approximately 2.5 seconds
Design: Anti-water-hammer closing characteristics

Construction & Materials

Body Material: Brass
Internal Components: Stainless steel
Seal Material: WRAS approved EPDM
WRAS Approval Certificate: 2304324

Media & Temperature

Media: Potable water
Media Temperature: -5°C to +130°C
Latching Coil & Electrical Specification
Coil Type: 22003L latching / bi-stable coil
Power: 10 Watts during operating pulse only
Pulse Duration: 10–20ms

Voltage Range Options:

3–9V DC
9–15V DC
The latching design consumes electrical energy only when changing valve position, making it particularly suitable for battery-powered, solar-powered and remote water control systems.

Protection

Ingress Protection: IP65
Electrical Connector: Supplied

Why Use a Latching Solenoid Valve?

Conventional solenoid valves generally require continuous electrical power to remain energised. A latching or bi-stable solenoid valve requires only a momentary electrical pulse to change position.
Once switched, the LPU225D-12 remains in its selected position without continuous power. This significantly reduces energy consumption and makes it particularly useful where battery life, heat generation or available electrical power is limited.

Typical Applications

Battery-powered water control
Smart water shut-off systems
Remote water isolation
Automatic water management systems
Water meters and metering equipment
Leak detection and automatic isolation systems
Water conservation systems
Solar-powered installations
OEM water control equipment
Potable water distribution
High-flow low-power water control
Applications requiring zero-power position holding

Technical Information

WRAS Approval Certificate: 2304324
Valve Type: Latching / bi-stable solenoid valve
Protection: IP65

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View Technical Specification

Technical Specification

Brand: Shako Co Ltd

Model: LPU225D12

Width: 96.00 mm

Height: 145.50 mm

Depth: 131.00 mm

Weight: 2.60 kg

Valve / Product Type: Solenoid Valve

Body Material: Brass

Port Size: 11/4 thread

Function: 2/2 Latching

Operation: Pressure Assisted from 0.5 Bar

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

Seals: EPDM

Approvals:: IP65, WRAS

Media: Water

Options required: Anti Water Hammer

Orifice: 38mm

Voltage: 3vDC, 6vDC, 12vDC

Found in these Categories

11/4 Water Solenoid Valve 0.5-10 Bar WRAS 3v 6v 12v Latching

£214.92 incl. VAT £179.10 ex. VAT

-35% Was £330.64 incl. VAT
Add To Cart

Brand: Shako Co Ltd

Model: LPU225D12

Stock: 71 in stock

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