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Overview
The Worm Gear Butterfly Valve with Limit Switch is a quarter-turn valve designed for flow regulation and shut-off in a wide range of industrial and building service systems.
Equipped with a worm gear operator and integrated microswitches, the valve provides reliable mechanical operation and accurate valve position indication, making it especially suitable for fire protection and automation-related applications.
This valve is widely used in petroleum, chemical industry, food & beverage, pharmaceutical, papermaking, water supply, sewage treatment, shipbuilding, metallurgy, energy systems, and fire protection networks.
Product Description
This butterfly valve adopts a compact concentric (resilient-seated) structure, offering tight sealing, smooth operation, and long service life.
The worm gear operator significantly reduces operating torque, enabling easy manual operation even for large diameters.
Integrated opening and closing microswitches provide electrical feedback signals to indicate valve position (open / close), supporting remote monitoring and control systems.
The valve is suitable for gases, liquids, semi-fluids, and powder media, including both corrosive and non-corrosive services depending on material selection.
It is particularly suitable for high-rise building fire protection systems, where accurate valve status indication is required.
Technical Specifications
| DN(mm) | 50(2'')~250(10") |
| PN(MPa) | 1.0. 1.6Mpa |
| Nominal pressure | Shell 1.5 2.4 |
| Sealing 1.1 1.76 | |
| Working temperature | -15~+150 |
| Suitable mediums | Fresh water, sewage,seawater,air,steam,food,medicine,etc. |
| Microswitch capacity | AC 220V 1A DC 30V 0.5A |
Small size and lightweight design
Easy installation in confined spaces.
Simple and compact structure
90-degree quarter-turn operation for quick opening and closing.
Low operating torque
Worm gear mechanism ensures smooth, energy-saving operation.
Excellent flow regulation
Linear flow characteristics provide good throttling performance.
Bubble-tight sealing
No leakage under pressure test conditions.
Long service life
Designed to withstand tens of thousands of open/close cycles.
Built-in microswitches
Provides accurate open/close position feedback.
Multiple installation options
Microswitches can be adjusted to match required signal positions.
This valve is suitable for:
Fire protection and sprinkler systems
Municipal water supply and drainage
Chemical and petrochemical systems
Food and pharmaceutical processing
Power generation and energy systems
Shipbuilding and offshore installations
Automation systems requiring valve position feedback
Especially recommended for high-rise buildings and fire protection systems, where valve open/close status must be clearly indicated.
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FAQ
A: The limit switch provides electrical signals indicating whether the valve is fully open or fully closed, allowing remote monitoring and integration into control systems.
A: The worm gear significantly reduces operating torque, making it easier to operate large-size valves and ensuring smooth, controlled movement.
A: Yes. The valve offers good flow regulation characteristics and can be used for both on/off and throttling applications.
A: Yes. It is widely used in fire protection networks, especially in high-rise buildings where valve status indication is required.
A: Yes. The microswitch cam can be adjusted to match different valve opening angles and signal requirements.
