Improve the low-pressure sealing performance of the valve. Patents such as “A low-torque pressure-balanced plug valve” by Fengsheng Technology have been approved
Thread Content
Recently, the patents for a \"low-torque pressure-balanced plug valve\" applied by Chengdu Chengfeng Valve Co., Ltd., Chengdu Chenggao Valve Co., Ltd., and Chengdu Chengfeng Fluid Technology Group Co., Ltd. were approved. The abstract indicates that the present invention pertains to the field of hydraulic valves; specifically, it relates to a low-torque pressure-balanced plug valve. This plug valve comprises a valve body, a plug, a valve stem, a connecting block, and a threaded seat ； The plug has a frustum-shaped structure that is larger at the bottom and smaller at the top. A fluid passage running through it is present inside the plug. The plug is rotatably mounted within a valve chamber provided in the valve body, thereby dividing the valve chamber into an upper chamber, a lower chamber, and a middle chamber ； The upper end of the plug is connected to the connecting block via a transmission mechanism. A threaded seat is installed within the valve body, near the upper chamber of the valve. One end of the valve stem fits with both the threaded seat and the connecting block, while the other end passes through the valve body and connects to the power output end of the driving device. This plug valve can reduce the opening torque of the valve and, when the medium pressure is low, provide sufficient preload for sealing, thereby improving the valve’s sealing performance at low pressures.
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