Grooved butterfly valve is a valve that controls the rotation of the butterfly plate through worm gear transmission. Its core feature is that it adopts a clamp-type groove connection design, which can be quickly installed and output "on" and "off" electrical signals to feedback the valve opening and closing status. It is mainly used for the cutoff, regulation and linkage control of fluid pipelines and fire protection systems.
1. Structural design and working principle Core components
Worm gear transmission: The worm is driven by a handwheel or an electric device to drive the worm gear to rotate, so that the butterfly plate can rotate 0~90°. Signal device: The cam triggers the contact with the rotation of the valve stem, outputs an electrical signal to the control system, and monitors the valve status in real time. Clamp connection: The groove clamp structure is adopted at both ends of the valve body, which can be quickly connected with the pipeline flange to reduce the installation time. Seal and material
The surface of the butterfly plate adopts an overall rubber coating process (such as EPDM rubber) to enhance wear resistance and two-way sealing performance. The valve body is mostly made of ductile iron or stainless steel, with a pressure range of 1.0~1.6MPa and an applicable temperature of -20℃~120℃.
2. Typical application areas
Fire protection system: Linked with the fire alarm system to quickly cut off or open the water flow in an emergency.
Municipal water supply: Used for flow regulation and pipeline maintenance in water plants and sewage treatment plants.
Industrial pipeline: Suitable for corrosive medium control in chemical, petroleum, gas and other industries.
3. Performance advantages
Installation convenience
Clamp connection does not require welding or flange bolt fixing, and the installation speed is increased by more than 50%, supporting operations in small spaces.
High sealing performance
The two-way sealing design (soft seal + metal hard seal) can adapt to a variety of media such as water, oil, and gas, and the leakage rate is lower than the ISO 5208 standard.
Signal feedback function
Integrated electrical signal output module, supports remote monitoring (such as PLC system), and meets industrial automation needs.
Environmental adaptability
Corrosion-resistant, high-temperature resistant (some models can reach 425°C), suitable for harsh working conditions.
4. Classification and selection According to the drive mode
Manual type: handle or handwheel operation, suitable for small pipe networks and low-frequency operation scenarios.
Electric type: motor drive, supports 4~20mA signal remote control, and is suitable for automation systems.
Turbine type: worm gear transmission enhances torque, suitable for large-diameter high-pressure pipelines.
Selection suggestions
Prioritize medium characteristics (such as corrosiveness, temperature) and pipeline pressure level.
Fire protection systems need to select signal feedback types to ensure compatibility with fire alarm systems.