The working characteristics of thecheck valveare large load changes and small opening and closing frequency. Once in the closed or open state, the service cycle is very long and does not require the rotation of moving parts. But once there is a switching requirement, it must be flexible.

Check valveis an automatic opening and closing valve, it does not require manpower or other operations. It relies on the flow of the pipeline medium to open or close the valve. It is mainly used to prevent the reverse flow control of the medium. The check valve has only one flow direction, tha

The purpose ofgate valvemaintenance is to extend valve life and ensure reliable operation.1.The thread of the valve stem often rubs against the stem nut, use a little yellow dry oil, molybdenum disulfide or graphite powder for lubrication. For valves that are not frequently opened

The quality of valve installation directly affects the future use of valves, so construction units and production units should pay attention to this. The valve should be carried out in accordance with the valve instruction manual and related regulations.1.The installation position, height, and

There are many standards for gate valves,most of the connection length are different. They are mainly divided into the following categories: ANSI, DIN, BS, JIS, GOST, SABS etc.According to the sealing surface of the wedge, the gate valve is divided into two types:metal seatedand&nb