Mechanical Butterfly Valve

Mechanical butterfly valve is a type of valve that controls the rotation of the butterfly plate through a mechanical drive device (such as a handle or worm gear) to achieve pipeline medium opening and closing or flow regulation. Its core feature is that it relies on manual or mechanical transmission mechanism operation, which is different from automatic drive methods such as electric and pneumatic.

Core structure and classification

Mechanical drive method

Manual operation: equipped with a handle or worm gear transmission mechanism, suitable for low-pressure, small-diameter pipelines (such as sanitary SMS threaded butterfly valves);

Mechanical linkage device: amplifies the operating torque through a gear set or lever, suitable for medium-diameter valves of DN50 and above.
‌Typical structural types‌

‌Centrosymmetric type‌: The valve stem and the butterfly plate are aligned, the structure is simple but the sealing performance is weak, and it is mostly used in low-pressure non-critical working conditions; ‌Eccentric design‌: Single eccentric and double eccentric structures can reduce opening and closing friction and extend the life of seals (such as the double eccentric design commonly used in sanitary stainless steel butterfly valves); ‌Metal hard seal‌: Stainless steel or cladding alloy sealing pairs are used, which can withstand high temperatures (≤450℃) and granular medium erosion, and are suitable for bidirectional sealing scenarios.

 

mechanical butterfly valve

 

Performance and application scenarios ‌
‌Core advantages ‌
‌High reliability ‌: Simple mechanical structure, low failure rate, suitable for frequent opening and closing or emergency shut-off conditions; ‌

Convenient maintenance ‌: No external power or gas source is required, and the cost of disassembly and maintenance is low (such as the top-mounted structure supports in-situ maintenance); ‌

Good economy ‌: Compared with electric/pneumatic valves, the procurement and maintenance costs are significantly reduced. ‌

Typical application areas ‌
‌Food and pharmaceutical industry ‌: Sanitary SMS threaded butterfly valves are used for dairy and pharmaceutical pipelines to meet the requirements of no-dead-angle cleaning; ‌

Industrial fluid control ‌: Bidirectional metal sealing butterfly valves are suitable for pipelines containing particle slurries and corrosive media (such as chemical raw material transportation); ‌

Municipal engineering ‌: Manual flange butterfly valves are used in fire water systems and sewage treatment plants to adapt to high-pressure water hammer impact.

Hot Tags: mechanical butterfly valve, China mechanical butterfly valve manufacturers, suppliers, factory, calibration of butterfly valve, cast iron butterfly valves, import butterfly valve, plastic butterfly valves, double flange type butterfly valve, Motorised Butterfly Valves