The most common driving methods for butterfly valves are handle, pneumatic, hydraulic and motorized. This article mainly introduces handle butterfly valves. Handle butterfly valves can be further subdivided into handle butterfly valves and turbine butterfly valves. Both have little impact on the installation of handle butterfly valves. The difference is more in operational use.
Handle butterfly valve installation precautions
Before the installation of the handle butterfly valve, it is necessary to confirm whether the product is suitable for the working conditions of the medium in the pipeline. The interior of the butterfly valve must be clean, including the sealing ring, the valve shaft, and the butterfly plate. Do not close the disc before cleaning the butterfly valve to prevent damage to the seal.
The handle wafer butterfly valve requires the use of a butterfly valve flange.
It is better to stand upright on the pipeline and not to reverse it.
Recommended use of worm gear operated butterfly valve when it is necessary to adjust the flow.
After installation, every part of the valve should be inspected regularly during the operation, and the failure is found out in time.
The operation method of handle butterfly valve
From the above we know that manual butterfly valves are divided into handle butterfly valves and turbine butterfly valves, and their operating methods will certainly be different.The operation of the handle butterfly valve is to pull the handle, turn it counterclockwise to open the valve, and turn it clockwise to close the valve. The turbine butterfly valve is equipped with a worm gear reducer on the stem of the butterfly valve. The turbine device makes the operation of the butterfly valve more labor-saving, responds to a larger medium pressure environment, and at the same time can improve the operability of the valve.
If the diameter of the butterfly valve is less than 150mm, it is recommended to use the handle to drive. If the diameter of the butterfly valve is more than 150mm, it is recommended to use a turbine device to make it easier to operate. The maximum diameter of the handle butterfly valve can only be 250mm. If it exceeds this maximum diameter, it will no longer be suitable and electric or pneumatic actuators will be required.
In industrial engineering, we recommend the use of a turbo butterfly valve, because in addition to saving energy, the turbine butterfly valve is better than the handle butterfly valve. In addition, the life of the turbine butterfly valve is higher than that of the handle butterfly valve in the pipeline with high switching frequency.