Electric Actuated Lug Type Butterfly Valves
An electric actuated lug butterfly valve combines remote control with the one-sided removal capability of a threaded lug body. At tank outlets, line ends or points with downstream equipment to be removed, this electrically operated valve stays attached to one flange when the other is detached.
The actuator consists of an electric motor and a worm gear reducer; the motor draws power only while moving, and the valve position is held by the self-locking gearing. The body is grey or ductile iron, the disc stainless steel, nickel-plated ductile iron or aluminium bronze, and the valve is PN16 up to DN300.
Main Applications
- Remote isolation at water tank and reservoir outlets
- Time-programmed valves at end-of-line filling points
- Pump discharges where the downstream side is removed for maintenance
- Main water inlets managed by building automation
- Treatment unit connections on sites without compressed air
- Motorised isolation on seawater service lines (bronze disc type)
Technical Data
| Valve connection | Lug; threaded lugs |
|---|---|
| Valve pressure class | PN16 (DN25–300) |
| Lug threads (PN16) | DN50: 4×M16 · DN80–DN125: 8×M16 |
| Bolt circle (PN16) | DN50: 125 mm · DN100: 180 mm |
| Medium temperature | EPDM −10 / +130 °C · NBR −10 / +80 °C |
| Actuator torque classes | 30–1000 Nm (10 steps) |
| Motor power | 8 W (30 Nm) … 180 W (800–1000 Nm) |
| Drive bore | Square 9×9 … 27×27 mm, depending on model |
| Stroke | 90°; 0–270° optional (to be specified when ordering) |
| Auxiliary switches | 2 × open/close SPDT, 250 V AC 10 A |
| Actuator weight | 2.1 kg (30 Nm) … 14.5 kg (1000 Nm) |
| End-of-line use | Possible; permissible pressure depending on model |
Material Options
| Part | PN16 · GG25 body, stainless disc | PN16 · GG25 body, nickel-plated disc | PN16 · ductile iron body, bronze disc |
|---|---|---|---|
| Valve body | Grey cast iron EN-GJL-250, threaded lugs | Grey cast iron GG25, threaded lugs | Ductile iron GGG-40.3, threaded lugs |
| Disc | Stainless steel AISI 316 | Nickel-plated ductile iron GGG-40.3 | Aluminium bronze |
| Stem | SS420 | SS420 | SS420 (DN40–300) |
| Seat / liner | EPDM | EPDM | NBR |
| Actuator internal materials | Steel, aluminium alloy, aluminium bronze, polycarbonate | Steel, aluminium alloy, aluminium bronze, polycarbonate | Steel, aluminium alloy, aluminium bronze, polycarbonate |
| Actuator external coating | Dry powder, epoxy polyester | Dry powder, epoxy polyester | Dry powder, epoxy polyester |
When an electric valve is used at a line end, bear in mind that it may remain open during a power cut; if closing on power loss is required, choose the spring-return pneumatic type. For long-term end-of-line service, close the open end with a blind flange.
Advantages
Remote End-of-Line Isolation
- Motorised operation at tanks and end points.
- No need for an operator on site.
Low Energy
- The motor runs only during movement.
- Draws 0.15–0.47 A at 220 V.
Stays in Place During Maintenance
- Lugs hold the valve on one flange.
- Downstream equipment is removed separately.
Adjustable Stroke
- 90° standard, up to 270° optional.
- Suits special valve and damper applications.
Construction and Design Features
- Threaded lug valve body with liner
- Electric actuator with aluminium alloy housing, anodised and powder coated
- Squirrel-cage asynchronous motor with internal thermal protection
- Captive cover bolts that stay on the housing when removed
- Cam-operated electronic and screw-adjusted mechanical limits
Request a quote for electric actuated lug butterfly valves by stating size, end-of-line use, supply voltage, medium and disc material.
How to Choose?
- Assess outage behaviourAn electric actuator stays in place on power loss; choose a spring-return pneumatic type if closing at a line end is required.
- Work out torque and currentChoose the torque class from the valve torque, then size cable and fuse from that class motor current.
- Match lug threadsCheck that lug threads match the flange hole count and bolt size.
- Plan feedbackMatch main and auxiliary limit switch wiring to the automation system for open-closed signals.
Complementary Products
Why ORFA?
Other Butterfly Valves
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Double Acting Pneumatic Wafer Butterfly Valves
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Electric Actuated Wafer Butterfly Valves
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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.
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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 Lug Type Butterfly Valves
ORFA supplies electric actuated lug type 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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