Description
1" WRAS Motorised Ball Valve 40 Bar Failsafe ABV08W
The ABV08W-E2-MO 1" WRAS approved motorised ball valve combines a high-flow nickel-plated brass ball valve with a compact IP67 electric actuator for automatic isolation and control of potable water and compatible industrial fluids.
Featuring a 25mm flow bore, 1" BSP female connections and ISO 5211 direct actuator mounting, the valve is rated to 40 bar maximum pressure with a valve temperature range of -20°C to +95°C.
Choose from Failsafe Closed, Failsafe Open or Power Open/Power Close control. The actuator also includes manual override, visual position indication and E2 volt-free open and closed position feedback as standard.
WRAS Approved Ball Valve
Function: 2/2 way isolation
Port: 1" BSP female
Orifice: 25mm
Pressure: 0–40 bar
Valve temperature: -20°C to +95°C
Body: Nickel-plated CW617N brass
Stem: 9mm
Seats: PTFE
O-rings: Viton
Actuator mounting: ISO 5211
WRAS Certificate: 2309911
High Flow 25mm Bore
The 1" ABV08W incorporates a 25mm flow bore, providing a large unrestricted flow path compared with many conventional electrically operated valves.
The rotary ball valve design makes it particularly suitable for applications requiring high flow, low pressure loss and reliable automatic shut-off.
Electric Actuator
Torque: 16–27Nm
Operating time: Approx. 10 seconds open or close
Rated cycle life: 70,000 open/close operations
Power consumption: Approx. 10 Watts
Standby consumption: Less than 0.5 Watt
Protection: IP67
Mounting: ISO 5211 F03 + F05
Ambient temperature: -15°C to +60°C
Manual override: Yes – Allen key supplied
Visual position indication: Yes
Position feedback: E2 volt-free open and closed switches
Available Voltages
✓ 12–24V DC Multi-Voltage
✓ 24V AC
✓ 110–240V AC Multi-Voltage
Control Options
The ABV08W-E2-MO is available with three control configurations to suit different automation and safety requirements.
Failsafe Closed
Power applied → Valve opens
Power removed or supply fails → Valve automatically closes using internally stored reserve energy.
Ideal where the required safe condition is to automatically isolate the fluid supply following electrical power failure.
Failsafe Open
Power applied → Valve closes
Power removed or supply fails → Valve automatically opens using internally stored reserve energy.
Suitable where the required safe condition is for the valve to return automatically to the open position following power failure.
Power Open / Power Close
Permanent supply:
Red → Positive / Live
Black → Negative / Neutral
Green → Control
Power to Green → Valve opens
Remove power from Green → Valve closes
Failsafe Reserve Energy
Failsafe versions use internal stored electrical energy to return the valve automatically to its designated safe position following loss of electrical power.
Allow the actuator to charge its reserve-energy capacitors before relying upon the failsafe function.
Following operation, approximately 1 minute of continuous electrical supply should be allowed for the reserve energy system to fully recharge.
The actuator consumes less than 0.5 Watt when powered but stationary.
E2 Open & Closed Position Feedback
E2 versions provide independent volt-free open and closed position feedback for connection to external PLC, BMS, relay or monitoring equipment.
The feedback contacts do not supply their own voltage and are rated up to 36V DC, 0.4A maximum.
Failsafe versions
Green → Open feedback
Yellow → Closed feedback
White → Common
Power Open / Power Close versions
Blue + Grey → Position feedback
Yellow + White → Position feedback
Always refer to the wiring diagram supplied with the selected actuator before installation.
Suitable Applications
✓ Potable Water Systems
✓ Automatic Water Isolation
✓ Leak Detection Systems
✓ Building Services
✓ Water Treatment Equipment
✓ HVAC Systems
✓ Process Water Systems
✓ BMS Controlled Isolation
✓ OEM Machinery
✓ Industrial Automation
✓ Remote Water Shut-Off
Long-Term Endurance Test
To assess actuator durability under demanding repetitive operation, an ABV-E2-MO/9AR failsafe actuator was placed under continuous in-house cycle testing beginning on 1 November 2020.
The actuator was installed on a dry 1½" BSP stainless steel ball valve and connected to an SVDT22 digital cycle timer.
The test operated continuously on a 60-second cycle:
30 seconds power ON → Valve Open
30 seconds power OFF → Valve Close
The assembly continued operating until October 2022, when it finally failed after:
977,762 open and close cycles
This substantially exceeded the actuator's standard rated life of 70,000 open/close operations.
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