With the development and change of the valve market and the industry within the end of the fifteenth period, the number of valve shares and private enterprises increased, the level of valve production increased, and the valve output increased signifi...
In general, if it is not tightly closed, first confirm whether the valve is closed in place. If there is still leakage and cannot be sealed after it has been closed in place, then check the sealing surface. Some valve seals are detachable, so take th...
1. Leakage of valve body and bonnet ► Reason: 1. The casting quality of the cast iron parts is not high, and there are defects such as sand holes, loose structure and slag inclusion on the valve body and valve cover body; 2. Freeze cracking; 3. Poor ...
"Know yourselves and know each other, no battles" The premise of correct selection and use of valves is a comprehensive and specific understanding of the advantages and disadvantages of each valve itself and the physical properties of the medium used...
(1) Direction and position Many valves are directional, such as shut-off valves, throttle valves, pressure-reducing valves, check valves, etc., if installed backwards, it will affect the use effect and life (such as throttle valve), or will not work...
The use pressure of new pipes, especially plastic pipes, is related to many factors, such as pipe diameter, pipe wall thickness, service temperature, pipe fitting processing method, pipe fitting and pipe connection method, etc. Among them, the connec...
1. Why should the outlet valve be closed when the centrifugal pump is started? When the centrifugal pump is started, there is no water in the outlet pipe of the pump, so there is no pipeline resistance and lifting height resistance. After the centrif...
The significance of choosing the correct valve In the fluid pipeline system, the valve is the control element, its main function is to isolate the equipment and the pipeline system, regulate the flow, prevent backflow, regulate and discharge the pres...
