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Resistance to be overcome by stainless steel globe valve operating force

Date: [2018-10-29] Click rate:

The stainless steel globe valve is a compulsory sealed valve, so when the valve is closed, pressure must be applied to the disc to force the sealing surface to not leak. When the medium enters the valve from under the stainless steel cut-off valve disc, the resistance to be overcome by the operating force is the friction between the valve stem and the packing and the thrust generated by the pressure of the medium. The force to close the valve is greater than the force to open the valve. Therefore, the diameter of the valve stem should be large, otherwise the failure of the valve top bending will occur.


Once the stainless steel globe valve is in the open state, there is no longer any contact between its seat and the sealing surface of the valve disc, so its sealing surface has less mechanical wear. It is not necessary to remove the entire valve from the pipeline when replacing the sealing element, which is very suitable for the occasion where the valve and the pipeline are welded into one body. The flow direction of the medium changes when passing through such valves, so the flow resistance of the shut-off valve is higher than other valves.