The purpose of using the check valve is to prevent the reverse flow of the medium, and the check valve is generally installed at the outlet of the pump. In addition, check valves should also be installed at the outlet of the compressor. In short, in order to prevent media counterflow, check valves should be installed on equipment, devices or pipelines.

Hard sealed ball valve in the use of conditions than the soft seal ball valve is much more stringent, high temperature, strong corrosion and dust, particles, mud and other media on the continued use of hard sealed ball valve caused considerable obstacles. During the use of hard sealed ball valves, valve failures are often forced to be repaired due to working conditions or human reasons. Understanding the causes of valve failures and finding ways to prevent them is necessary and effective for valve industry workers and product users.

During the construction process, the quality of the valve installation directly affects the normal operation in the future, so it must be paid attention to. So, how to install the valve? What are the main points of valve installation? What are the taboos and precautions?

Ball valves are evolved from plug valves. Its opening and closing parts are used as a sphere, and the sphere is rotated 90° around the axis of the valve stem to achieve the purpose of opening and closing. Ball valve is mainly used to cut off or connect the medium, can also be used for fluid regulation and control, V-type ball valve can be more accurate flow regulation and control, and three-way ball valve is used to distribute the medium and change the flow direction of the medium.

Valves can be used to control the flow of various types of fluids such as air, water, steam, various corrosive media, mud, oil, liquid metal and radioactive media. Because it is very important to choose the most suitable valve for the pipeline system, it is also very important to understand the characteristics of the valve and the steps and basis for selecting the valve.

Globe valves, gate valves, butterfly valves, check valves and ball valves are now indispensable control components in various piping systems. Each valve is different in appearance, structure and even functional use.