1¼" WRAS Approved Normally Open Water Solenoid Valve – 0.5–10 Bar
ASCO Sirai WRAS Approved Normally Open Water Solenoid Valve for Potable Water Applications
1¼ inch WRAS approved normally open water solenoid valve – ASCO Sirai model L282D48-11/4.
Designed for potable water systems, commercial water services and industrial water control, this 2/2 way normally open pressure assisted brass solenoid valve combines proven ASCO Sirai reliability with WRAS approved EPDM sealing materials. Operating in a fail-safe open configuration (power to close), it is ideal for safety-critical water systems where water flow must be maintained automatically during power failure.
Key Features
✓ WRAS approved for potable water applications
✓ Latest WRAS Approval No. 250702716
✓ 2/2 way normally open operation
✓ Fail-safe open – power to close
✓ Pressure assisted diaphragm design
✓ 0.5 Bar minimum operating pressure
✓ 0.5–10 Bar operating pressure
✓ Anti water hammer design
✓ Brass body with stainless steel internals
✓ High-flow 30mm orifice
✓ WRAS approved EPDM seals
✓ Media temperatures up to +85°C
✓ IP67 coil with DIN connector
✓ 100% continuous duty rated
✓ AC and DC voltage options
✓ Free next working day UK delivery
Typical Applications
Potable water systems
Priority demand systems
Safety shut-off systems
Water treatment equipment
Commercial water installations
Industrial process water
OEM machinery
Applications requiring fail-safe open operation
Technical Specification
Function: 2/2 way normally open (fail-safe open – power to close)
Valve Type: Pressure assisted diaphragm
Port Size: 1¼" BSPP female (ISO 228)
Orifice: 30mm
Flow Factor (Kv): 15m³/hr
Minimum Pressure Differential: 0.5 Bar
Operating Pressure: 0.5–10 Bar
Maximum Allowable Pressure (PS): 10 Bar
Body Material: Brass
Internal Components: Brass & stainless steel
Guide Assembly: Stainless steel
Seat Material: Brass
Seal Material: WRAS approved EPDM
Suitable Media: Clean potable water and compatible liquids
Maximum Viscosity: 37 cSt
Media Temperature: -10°C to +85°C
Ambient Temperature: -10°C to +50°C
Performance
Design Feature: Anti water hammer construction
Opening Time: Approximately 300ms–1500ms
Closing Time: Approximately 1000ms–2000ms
Continuous Duty: ED100%
Protection Rating: IP67 with DIN connector fitted
Electrical Connection: DIN 46340 3-pin connector (EN175301-803)
Coil Specification
Power Consumption
DC: 9 Watts
AC: 28VA inrush / 20VA holding
Voltage Options
DC
12VDC
24VDC
AC
24VAC
110VAC
230VAC
(Other voltages available on request.)
WRAS Approval
This valve is fitted with WRAS approved EPDM sealing materials and forms part of WRAS Approval Certificate No. 250702716 for use with products complying with the Water Supply (Water Fittings) Regulations across England, Scotland, Wales and Northern Ireland. Approval valid until 31 July 2030.
Why Choose This Valve?
This 1¼" WRAS valve L282D-BIG Series is the ideal choice where higher flow rates are required together with fail-safe open operation. Featuring a 30mm full-bore orifice and Kv of 15m³/hr, it is well suited to commercial plant rooms, priority water supplies, industrial process systems and larger water distribution installations. The anti water hammer design helps minimise hydraulic shock, improving system reliability and extending valve service life.
