screwjacks

  The spool ball of the floating ball valve moves between the two seat sealing rings with the help of medium pressure, while the spool ball of the trunnion mounted ball valve is connected with the valve stem and rotates around the center of the valve stem, and the floating seat support ring. Floating Ball Valve The ball of the floating ball valve is floating. Under the action of medium pressure, the ball can produce a certain displacement and press tightly on the sealing surface of the outlet end to ensure the seal of the outlet end. The floating ball valve is small in size, light in weight, simple in structure and good in sealing performance. The load of the working medium that the ball bears is all transmitted to the outlet sealing ring, so it is necessary to consider whether the material of the sealing ring can withstand the working load of the ball medium. This structure is widely used in medium and low pressure ball valves. Trunnion Mounted Ball Valve The ball of the trunnion m

The eccentric half ball valve has the advantages of rapid opening and closing, light weight, small flow resistance, wedge-shaped principle can be used to remove fouling when closing, and is convenient for air control and electric control, etc., and has been widely used in various industries. A new self-sealing structure of the sealing pair is designed for the application of the eccentric half ball valve under high temperature and high pressure conditions. Working Principle The center of rotation of the eccentric half ball valve body and the half ball body (that is, the axis of the valve stem) is offset by a radial dimension from the geometric center of the half ball sealing spherical surface, and also has an offset dimension from the sealing surface of the valve seat on the axis of the valve body channel. The eccentric half ball valve relies on two eccentrics to realize self-locking closure, and the reasonable selection of eccentrics makes the self-locking angle smaller than the fric

  The globe valve is a valve that uses the valve stem to lift and drive the valve head, thereby changing the distance between the valve disc and the valve seat to achieve opening and closing control. The globe valve is the most widely used cut-off valve in chemical production. Globe valves are mainly used for the control of water, steam, compressed air and other pipelines in actual production, but they are not suitable for materials with high viscosity and easy crystallization. The structure of the globe valve is relatively simple, but the actual operation is simple and labor-saving, and it has a good performance in regulating the flow and cutting off the channel. The opening and closing speed is slow and there is little water hammer. The globe valve is compact in structure and has obvious characteristics in appearance. The top of the valve is equipped with a hand wheel and a valve stem, and the middle is provided with a thread and a stuffing box sealing section. The main way to judge