What Is The Difference Between Butterfly Valve Handle Drive And Worm Gear Drive? How Should I Choose?
Both handle butterfly valves and worm gear butterfly valves require manual operation, commonly known as manual butterfly valves, but there are still differences in their use.
1. The handle of the butterfly valve directly drives the valve plate, making it quick to switch but laborious; The worm gear butterfly valve drives the valve plate through the worm gear, which is slow to open and close but labor-saving. Therefore, when the pressure inside the pipeline is high, choosing a handle butterfly valve will be particularly laborious. It is recommended that you choose a worm gear butterfly valve.
2. The commonly used butterfly valves in engineering are generally worm gear butterfly valves, because in addition to being labor-saving, their sealing performance is also better than handle butterfly valves. Especially in environments with high switching frequencies, worm gear butterfly valves have a longer service life than handle butterfly valves.
3. Handle butterfly valves are generally used with small diameters (within DN200), as the torque of small diameter butterfly valves is generally smaller and can be opened and closed directly by hand. Worm gear butterfly valves use a gearbox to drive the valve stem to rotate, which is more labor-saving.
The selection principles for handle drive and worm gear drive:
When the torque of the valve stem is greater than 300N · M, a gearbox drive is used, and the rest are generally driven by a handle.
