The stainless steel flange globe valve 150FJ-1.6PA2 belongs to the forced sealing type valve, so when the valve is closed, pressure must be applied to the valve disc to force the sealing surface not to leak. When the medium enters valve 6 from below the valve disc, the resistance that needs to be overcome by the operating force is the friction force between the valve stem and 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, so the diameter of the valve stem should be larger, otherwise the failure of the valve stem top bending will occur. 

 

In recent years, since the emergence of stainless steel flange globe valve 150FJ-1.6PA2 , the medium flow direction of flange globe valves has shifted from above the valve disc to the valve chamber. At this time, under the action of medium pressure, the force to close the valve is small, while the force to open the valve is large, and the diameter of the valve stem can be correspondingly reduced. At the same time, under the action of the medium, this type of valve is also relatively tight.

 

 

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DFYLSYC-2023-05-18-A