Description
1¼" WRAS N/Open Water Solenoid Valve – Danfoss EV220BNO
The Danfoss 132U3201 is a 1¼" 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 combines a 32mm orifice, Kv 18 m³/h flow capacity and 0.3–16 Bar operating pressure with controlled anti-water-hammer operation.
The 132U3201 replaces the previous Danfoss 032U7134, providing a useful cross-reference for existing installations and replacement requirements.
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.
With no electrical power applied, the valve remains open. Energising the solenoid closes the valve, providing fail-safe open operation.
1¼" BSP Connection & High Flow
Port Size: 1¼" BSP
Orifice Size: 32mm
Kv Flow Factor: 18 m³/h
The large 32mm flow path provides high flow capacity for commercial, industrial and building-services water systems.
Anti-Water-Hammer Operation
Opening Time: 1.0 Second
Closing Time: 2.5 Seconds
The controlled 2.5 second closing time helps reduce sudden changes in water velocity when the valve is energised closed.
This controlled operation helps minimise pressure surges and water hammer, particularly in larger pipework and higher-flow water systems.
Brass & Stainless Construction
Body Material: Brass
Internal Components: Stainless Steel
Seal Material: EPDM
The robust brass body, stainless steel internal components and WRAS-approved EPDM sealing provide durable 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: 120mm
Body Width: 82mm
Coil Width: 46mm
Overall Height: 120mm
H1 Dimension: 27mm
Weight: Approximately 2.0kg
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 132U3201 provides a strong combination of WRAS-approved construction, high flow capacity, normally open operation and 16 Bar pressure capability.
Its 32mm orifice and Kv 18 m³/h provide substantial flow through 1¼" pipework, while the controlled 2.5 second closing time helps reduce hydraulic shock and water hammer.
The valve's normally open design ensures flow continues when electrical power is removed, making it particularly suitable where fail-safe open water control is required.
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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