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Working principle and installation and maintenance of pump fitting stop valve

Nov 28, 2018

The pump castings stop valve is a widely used valve. The opening and closing member is a plug-shaped valve flap, and the sealing surface is designed with a flat or tapered structure. The valve flap moves linearly along the center line of the fluid. The reason why it is popular is that the friction between the sealing surfaces during the opening and closing process is small, relatively durable, the opening height is not large, the manufacturing is easy, the maintenance is convenient, and it is not only suitable for medium and low pressure, but also suitable for high pressure.


In practical applications, the hand wheel is first turned, and then the thread of the hand wheel and the valve stem is moved in and out, thereby lifting or lowering the valve flap connected with the valve stem to achieve the opening and closing of the pump castings stop valve. Seat design The carbon steel globe valve seat is usually made of forged steel. The seat sealing material can be sprayed with hard alloy according to user requirements. Separate threaded swivel seat, welded seat and body can be directly machined according to customer requirements.


When installing and maintaining the pump castings stop valve, the following matters need to be noted: 1. The handwheel and handle operated shut-off valve can be installed at any position of the pipeline; 2. Handwheel, handle and transmission mechanism are not allowed. For lifting; 3, the flow direction of the medium should be consistent with the direction of the arrow shown in the valve body.http://www.pump-casting.com/