Electric Actuated Wafer Butterfly Valves
An electric actuated wafer butterfly valve is formed by connecting an electric motor with a worm gear reducer to the stem of a wafer-bodied valve. In plants without compressed air, it lets the valve be opened and closed remotely by a voltage signal from the control panel or automation system.
The actuator runs on 220 V AC single phase as standard; 110 V AC, 380/440 V three phase and 24/110/220 V DC supplies are optional. Because the gear train is self-locking, the valve stays in position when power is lost and can be turned by hand with the mechanical lever when there is no power.
Main Applications
- Automatic isolation in buildings and plants without compressed air
- Time and temperature-controlled zone valves in heat stations
- Level-controlled shut-off at water tank and booster set outlets
- Remote start-up in cooling tower and chiller circuits
- Programmed line selection in irrigation and treatment plants
- Electrically operated remote points outdoors
Technical Data
| Valve connection | Wafer |
|---|---|
| Size range | DN50–DN300, depending on model |
| Valve pressure class | PN10 (cast iron body) · PN16 (GG25 / ductile iron body) |
| Actuator torque | 30 · 50 · 80 · 100 · 150 · 200 · 400 · 600 · 800 · 1000 Nm |
| 90° operating time | 30 Nm: 10 s · 50–600 Nm: 30 s · 800–1000 Nm: 40 s |
| Supply | Standard 220 V AC; optional 110 V AC, 380/440 V 3-phase, 24/110/220 V DC |
| Limit switches | 2 × open/close SPDT, 250 V AC 10 A; 2 × auxiliary switches |
| Enclosure | IP67, NEMA 4 and 6 (IP68 optional) |
| Thermal protection | Inside the motor; opens at 120 ± 5 °C, closes at 97 ± 5 °C |
| Heater | 7–10 W, anti-condensation |
| Ambient conditions | −20 / +70 °C; max. 90% RH (non-condensing) |
| Manual operation | Mechanical lever (handwheel optional); cable entries 2 × M18 |
Material Options
| Part | PN10 · cast iron body, stainless disc | PN16 · GG25 body, nickel-plated disc | PN16 · ductile iron body, bronze disc |
|---|---|---|---|
| Valve body | Cast iron | Grey cast iron GG25 | Ductile iron EN-GJS-400-18 |
| Disc | Stainless steel AISI 316 | Nickel-plated ductile iron GGG-40.3 | Aluminium bronze |
| Valve seat | PTFE (−10 / +80 °C) | EPDM (−10 / +130 °C) | NBR (−10 / +80 °C) |
| Actuator housing | Aluminium alloy, anodised + polyester powder coat | Aluminium alloy, anodised + polyester powder coat | Aluminium alloy, anodised + polyester powder coat |
| Actuator motor | Squirrel-cage asynchronous, class F insulation | Squirrel-cage asynchronous, class F insulation | Squirrel-cage asynchronous, class F insulation |
| Actuator gearing | Self-locking worm and worm gear | Self-locking worm and worm gear | Self-locking worm and worm gear |
The actuator must be chosen from a torque class that covers the valve torque at maximum working pressure with a safety margin; for example a DN100 valve needs 53 Nm and a DN200 valve 194 Nm operating torque at 16 bar. If the valve must close by itself on power failure, consider a spring-return pneumatic type or a battery-backed solution.
Advantages
No Air Supply Needed
- Runs on electrical supply only.
- No compressor or air treatment required.
Holds Position
- Self-locking gearing.
- The valve stays put when power is lost.
Manual Operation on Site
- Open and close by hand with the mechanical lever.
- Easier commissioning and fault intervention.
Suited to Outdoor Use
- IP67 enclosure, anti-condensation heater.
- Internal circuitry stays dry through humidity and temperature changes.
Construction and Design Features
- Wafer butterfly valve
- Electric actuator with ISO 5211 / DIN 3337 base and double-square stem bore
- Worm gear reducer and squirrel-cage motor
- Dual mechanical and electrical limits, adjustable external limit screws
- Convex position indicator at the centre of the shaft
Request a quote for electric actuated wafer butterfly valves by stating size, medium, supply voltage, control type (on-off) and feedback needs.
How to Choose?
- Set the supply voltageChoose a 220 V AC, 24 V DC or three-phase actuator to match the voltage available in the panel.
- Choose the torque classSelect the first actuator torque class above the valve torque at 10 or 16 bar, with a safety margin.
- Check operating timeA 90° stroke takes 10–40 s; assess this time for lines needing fast closing.
- Check ambient conditionsIP67 is standard outdoors; ask for the IP68 option if there is a risk of permanent submersion.
Complementary Products
Why ORFA?
Other Butterfly Valves
Double Acting Pneumatic Lug Butterfly Valves
Double acting pneumatic lug butterfly valves are lug body valves opened and closed automatically by an actuator driven by air in both directions.
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Double Acting Pneumatic Wafer Butterfly Valves
Double acting pneumatic wafer butterfly valves are wafer body valves automatically controlled by an actuator driven by air in both directions.
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Electric Actuated Lug Type Butterfly Valves
Electric actuated lug type butterfly valves are lug body valves opened and closed remotely by an electric actuator.
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Lug Type Butterfly Valves
Lug type butterfly valves have threaded lugs, so they can be used at line ends and one side can be dismantled.
Details →PVC-U and PPRC Butterfly Valves
PVC-U and PPRC butterfly valves have corrosion resistant plastic bodies and are used in water treatment and chemical lines.
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Gear Operated Lug Type Butterfly Valves
Gear operated lug type butterfly valves are lug body valves opened and closed easily and gradually with a handwheel and gearbox.
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Gear Operated Wafer Butterfly Valves
Gear operated wafer butterfly valves are wafer body valves with a handwheel and gearbox for easy operation in large sizes.
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Single Acting Pneumatic Lug Butterfly Valves
Single acting pneumatic lug butterfly valves are lug body valves whose spring return actuator moves to a safe position when air fails.
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Single Acting Pneumatic Wafer Butterfly Valves
Single acting pneumatic wafer butterfly valves are wafer body valves whose spring return actuator moves to a safe position when air fails.
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Wafer Type Butterfly Valves
Wafer type butterfly valves are lightweight, compact butterfly valves clamped between two flanges.
Details →Our Electric Actuated Wafer Butterfly Valves
ORFA supplies electric actuated wafer butterfly valves in a range of pressure classes, sizes and connection types to suit your application. Descriptions, technical specifications, materials and dimension tables are available on each detail page.
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