Description
1½" WRAS N/Open Water Solenoid Valve – Danfoss EV220BNO
The Danfoss 132U4001 is a 1½" WRAS approved normally open brass solenoid valve designed for high-flow potable water systems where the valve must remain open when electrical power is removed.
This 2/2 way normally open, pressure-assisted valve provides a 40mm orifice, Kv 24 m³/h flow capacity and 0.3–16 Bar operating pressure, combined with controlled anti-water-hammer operation.
The 132U4001 replaces the previous Danfoss 032U7142, providing a direct reference for replacement and existing installations.
Valve Function & Operation
Function: 2/2 Way Normally Open
Operation: Pressure Assisted
Fail Position: Open
Energised Position: Closed
Minimum Pressure Differential: 0.3 Bar
Maximum Operating Pressure: 16 Bar
The pressure-assisted diaphragm requires a minimum 0.3 Bar differential pressure for reliable operation.
When electrical power is removed the valve remains open. Energising the solenoid closes the valve, providing fail-safe open operation.
1½" BSP Connection & High Flow
Port Size: 1½" BSP
Orifice Size: 40mm
Kv Flow Factor: 24 m³/h
The large 40mm flow path provides high flow capacity through 1½" pipework, making the valve particularly suitable for commercial and industrial water systems.
Anti-Water-Hammer Operation
Opening Time: 1.5 Seconds
Closing Time: 4.0 Seconds
The controlled 4 second closing time helps prevent rapid changes in water velocity when the valve is energised closed.
This helps reduce hydraulic shock, pressure surges and water hammer in larger pipework and high-flow installations.
Brass & Stainless Construction
Body Material: Brass
Internal Components: Stainless Steel
Seal Material: EPDM
The brass valve body, stainless steel internal components and WRAS-approved EPDM seals provide robust construction for potable-water installations.
WRAS Approved for Potable Water
The valve is configured with WRAS approved EPDM seals for potable-water applications.
Typical Media:
✓ Potable Water
✓ Mains Water
✓ Process Water
✓ Water Treatment Systems
✓ Compatible EPDM-Suitable Fluids
Maximum Fluid Viscosity: 50 cSt
Solenoid Coil
Coil Type: BB
DC Coil Power: 18 Watts
AC Coil Power: 10 Watts
Insulation Class: Class H 180°C
Duty Cycle: 100% Continuous
Protection: IP65 With Connector
Electrical Connection: DIN 43650A
Electrical Connector: Included
Voltage Options
✓ 12V DC
✓ 24V DC
✓ 24V AC
✓ 110V AC
✓ 230V AC
Voltage Tolerance: ±10%
Dimensions & Weight
Overall Length: 130mm
Body Width: 95mm
Coil Width: 46mm
Overall Height: 129mm
H1 Dimension: 32mm
Weight: Approximately 3.0kg
Typical Applications
✓ Potable Water Distribution
✓ Commercial Plumbing Systems
✓ Building Services
✓ Water Treatment Equipment
✓ Industrial Water Control
✓ Filtration Systems
✓ Cooling Water Systems
✓ Process Water Systems
✓ Fail-Safe Open Water Control
✓ Water Hammer Sensitive Systems
Why Choose the Danfoss EV220BNO?
The Danfoss 132U4001 combines WRAS-approved construction, normally open fail-safe operation and 16 Bar pressure capability with substantial flow capacity for larger water systems.
Its 40mm orifice and Kv 24 m³/h provide high flow through 1½" pipework, while the controlled 4 second closing time helps minimise hydraulic shock and water hammer.
The normally open configuration means water flow continues when electrical power is removed, with the valve closing when energised.
Available Normally Open Sizes
1/2" BSP – 15mm – Kv 4.0 m³/h
3/4" BSP – 20mm – Kv 8.0 m³/h
1" BSP – 25mm – Kv 11 m³/h
1¼" BSP – 32mm – Kv 18 m³/h
1½" BSP – 40mm – Kv 24 m³/h
2" BSP – 50mm – Kv 40 m³/h
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