Description
2" Fast WRAS Stainless Steel Motorised Ball Valve – 1–2 Second
The ABV20S Series is a 2" BSP fast-acting WRAS approved stainless steel motorised ball valve designed for rapid automatic water isolation and flow control.
Featuring a 50mm full-bore 304 stainless steel ball valve and high-speed electric actuator, the valve opens or closes in just 1–2 seconds, making it particularly suitable for leak detection, emergency water shut-off, building services and automated water control systems where conventional slow motorised valves are unsuitable.
Available in 12V DC or 24V DC, with a choice of failsafe closed, failsafe open or power open/power close control, the actuator incorporates manual override, visual position indication and volt-free open and closed position feedback as standard.
The valve is rated from 0 to 10 Bar, requires no minimum differential pressure and uses WRAS-approved EPDM and PTFE sealing materials for potable water applications.
WRAS Approved Ball Valve
WRAS Approved: Yes
Port Size: 2" BSP
Optional Thread: NPT
Bore: 50mm
Pressure: 0–10 Bar
Minimum Differential Pressure: 0 Bar
Media: Water
Media Temperature: 0°C to +90°C
Body: 304 stainless steel
Ball: Stainless steel
Stem: Stainless steel
Seals: WRAS EPDM + PTFE
The stainless steel valve is designed for water applications requiring WRAS-approved sealing materials and provides a 50mm full-bore flow path on the 2" model.
Fast 1–2 Second Operation
Unlike conventional motorised ball valves that can take several seconds or considerably longer to operate, this high-speed actuator opens or closes the valve in approximately 1–2 seconds.
This rapid response makes it particularly useful for applications where water flow must be isolated quickly following an alarm, sensor signal or control command.
The actuator is rated for 70,000 cycles and 100% duty.
Actuator Specification
Actuator Type: Fast electric rotary actuator
Operating Time: 1–2 seconds
Torque: 24.1–26Nm depending on configuration
Voltage: 12V DC or 24V DC
Duty Rating: 100%
Cycle Rating: 70,000 operations
Protection: IP68
Ambient Temperature: -15°C to +60°C
Mounting: ISO 5211 F03/F05
Gearing: Metal
Housing: Engineering plastic
Cable: 0.5 metre
Optional Cable: 3 metre
Manual Override: Yes
Visual Position Indicator: Yes
Position Feedback: Open + closed
The actuator automatically switches off its motor after reaching the required valve position, reducing static power consumption and actuator heating.
Control Options
Three control configurations are available depending upon the required application.
Failsafe Closed
Power ON → Valve opens
Power OFF → Valve automatically closes using stored reserve power
This configuration is ideal where the valve must automatically isolate the water supply following loss of electrical power.
Failsafe Open
Power ON → Valve closes
Power OFF → Valve automatically opens using stored reserve power
This configuration is suitable where loss of electrical power must automatically restore the valve to the open position.
Power Open / Power Close
Permanent power is connected to the actuator using the red positive and black negative wires.
Power applied to the green control wire → Valve opens
Power removed from the green control wire → Valve closes
The motor automatically powers off when the commanded position has been reached.
Failsafe Reserve Power
The failsafe versions incorporate internal Farad capacitor reserve power.
During normal powered operation, the capacitors store sufficient electrical energy to return the valve automatically to its designated failsafe position if the external electrical supply is lost.
After a failsafe operation, the actuator requires approximately 1.5–2 minutes with power restored to recharge the reserve capacitors before full failsafe operation is available again.
Low Standby Power Consumption
Once the valve reaches its commanded position, the actuator motor automatically switches off.
The manufacturer's electrical data gives static consumption of approximately:
Failsafe 12–24V DC: 0.19W
12V DC Power Open/Close: 0.06W
24V DC Power Open/Close: 0.19W
This provides very low power consumption when the valve remains stationary for extended periods.
Electrical Performance
12–24V DC Failsafe
Torque: 24.1Nm
Locked / Stuck Current: 5A
Moving Current: 1–2A
Static Power: 0.19W
12V DC Power Open/Close
Torque: 25.5Nm
Locked / Stuck Current: 5A
Moving Current: 2A
Static Power: 0.06W
24V DC Power Open/Close
Torque: 26Nm
Locked / Stuck Current: 3.5A
Moving Current: 1A
Static Power: 0.19W
Enclosure protection is IP68 across the range.
E2 Open & Closed Position Feedback
The actuator includes E2 volt-free position feedback switches for remote confirmation of fully open and fully closed valve positions.
No voltage is supplied by the feedback switches.
Maximum Feedback Rating: 36V DC, 0.4A
Failsafe Closed
Green: Open signal
Yellow: Closed signal
White: Common
Failsafe Open
Green: Closed signal
Yellow: Open signal
White: Common
Power Open / Power Close
Blue + Grey: Open feedback
Yellow + White: Closed feedback
The feedback contacts can be connected to a suitable PLC, BMS, alarm or control system for remote valve position monitoring.
Manual Override & Position Indication
A manual override is incorporated into the actuator and operated using the supplied Allen key.
This allows the valve position to be manually changed when required for installation, commissioning or maintenance.
A visual position indicator provides local confirmation of valve position.
Pressure & Temperature
Operating Pressure: 0–10 Bar
Minimum Pressure: 0 Bar
Media Temperature: 0°C to +90°C
Ambient Temperature: -15°C to +60°C
Media: Water
Mounting Position: Any
Unlike pressure-assisted solenoid valves, the motorised ball valve does not require differential pressure to operate, making it suitable for gravity-fed and low-pressure water systems as well as pressurised installations.
Typical Applications
✓ Water leak detection systems
✓ Automatic water shut-off
✓ Flood prevention systems
✓ Building management systems
✓ Water isolation systems
✓ Commercial plumbing
✓ Process water systems
✓ Tank and pump systems
✓ Remote valve control
✓ OEM machinery
✓ Automated water systems
✓ Emergency water isolation
Why Choose a Fast Motorised Ball Valve?
Many conventional motorised ball valves are designed for applications where operating speed is relatively unimportant.
This valve operates in only 1–2 seconds, making it particularly useful where rapid isolation of a larger water line is required.
Unlike a pressure-assisted solenoid valve, the motorised ball valve provides a full 50mm bore, zero differential pressure operation and very low static power consumption once it has reached position.
The choice of failsafe closed, failsafe open or power open/power close control allows the valve behaviour to be matched to the safety requirements of the installation.
Failsafe Closed vs Failsafe Open
Failsafe Closed is normally selected where loss of electrical power should automatically isolate the water supply. Typical examples include leak detection and flood-prevention systems.
Failsafe Open is used where maintaining or restoring water flow during loss of electrical power is the required safety condition.
Both versions use stored capacitor energy to move the valve automatically following power failure.
Technical Specification
Series: ABV-S-2SEC-E2-MO
Model: ABV20S
Valve Type: 2-way motorised ball valve
Port Size: 2" BSP
Optional Thread: NPT
Bore: 50mm
Pressure: 0–10 Bar
Minimum Differential: 0 Bar
Media: Water
Media Temperature: 0°C to +90°C
Valve Body: 304 stainless steel
Ball: Stainless steel
Seals: WRAS EPDM + PTFE
WRAS Approved: Yes
Operating Time: 1–2 seconds
Voltage: 12V DC or 24V DC
Control: Failsafe closed, failsafe open or power open/power close
Torque: 24.1–26Nm
Duty: 100%
Cycle Rating: 70,000
Actuator Protection: IP68
Ambient Temperature: -15°C to +60°C
Mounting: ISO 5211 F03/F05
Gears: Metal
Manual Override: Yes
Visual Position Indicator: Yes
Position Feedback: E2 open + closed volt-free switches
Feedback Rating: 36V DC, 0.4A max
Cable: 0.5m
Optional Cable: 3m
Weight: 2.3kg
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