February 22, 2025

What is the ball valve

Top loaded ball valve is widely used in oil and gas pipelines, and oil, oil refining, petrochemical, chemical, chemical fiber, metallurgy, electricity, nuclear power, food and paper and other devices. Top-mounted ball valve in the pipeline demolition is simple and quick, easy maintenance. When the valve fails in the pipeline to be repaired, there is no need to disassemble the valve from the pipeline. Just remove the middle flange bolt and nut, remove the valve cover and the stem assembly together with the valve body, and then remove the ball and valve Seat assembly. The ball and seat can be repaired online. This maintenance saves time and minimizes production losses. Top loaded ball valve is divided into floating ball valve and fixed ball valve. Float mounted ball valve nominal size ≤ DN200. The sphere exerts a compression spring, the role of the compression spring is to exert preload on the ball so that the valve seat sealing surface in all circumstances are in close contact, sealing performance. Seat and body contact surface wedge angle of 10 °, the valve seat to self-locking in the direction of the pipeline, when the valve seat subjected to greater pressure, the valve seat will not produce any displacement. Therefore, the structure of the valve has the characteristics of both the valve and the ball valve advantages. In the maintenance inspection found that the valve body and seat prone to leakage, if you increase the spring preload, it is bound to increase the ball valve closing torque. In order not to increase the closing torque of the ball valve, a rubber O-ring is added on the back of the valve seat sealing surface to solve the leakage problem of the back surface of the valve seat sealing surface. The drawback of the fixed ball valve is the spring preload can not be adjusted and controlled, and the spring assembly when a large amount of compression, assembly difficulties. In order to solve this problem, ANSI 302 is used instead of 304 as the spring material. ANSI 302 spring stiffness, corrosion resistance and 304 similar. In addition, an increase of spring seat and adjusting nut, outside the seat and spring seat on the outer thread respectively, with the adjusting nut spring will be pressed into the spring seat, the seat assembly into the valve body. Since the spring is compressed before the ball is installed, it is convenient to install the ball. When the ball is assembled, the adjusting nut will be withdrawn from the spring seat. At this moment, the spring preloads the ball less. If you want to increase the preload, adjust the nut can be used to adjust.

Stainless Steel Shower Head

The utility model discloses a Kitchen Shower head that is convenient to switch the water outlet mode, has a compact structure, and is easy to use and a kitchen faucet using the kitchen shower head. The shower head includes a shower body and a shower head provided with a spray water outlet and a V-shaped water outlet. , The shower head is provided with a water separator, and the water separator is provided with an annular flow channel and an inner flow channel respectively connected to the spray water outlet body and the V-shaped water outlet body, and the lower end of the outer wall of the water separator is upwardly circular A plurality of water inlet holes connected to the annular flow channel are provided, and a first sealing ring is provided on the lower side of the water inlet hole; the water outlet end of the shower body is connected with a converter, and the converter is provided with a communicating In the water diversion cavity at the water outlet end of the shower body, the lower end of the water diversion device is installed in the water diversion cavity and can move up and down, and the upper end of the inner wall of the water diversion cavity is provided with a matching first sealing ring

Kitchen Pull Shower,Kitchen Pull Shower Head,Stainless Steel Shower Head,Rotating Wash Basin Shower

Yuyao Zelin Sanitary Ware Co., Ltd , https://www.zelinshower.com