Why should the cut-off valve be low and high?
Release time:
2021-02-22
Stop valve, also known as cut-off valve, is a forced seal valve, is a kind of cut-off valve. According to the connection method is divided into three kinds: flange connection, thread connection, welding connection.
Stop valve, also known as cut-off valve, is a forced seal valve, is a kind of cut-off valve. According to the connection method is divided into three kinds: flange connection, thread connection, welding connection.
China's valve "three to" has stipulated that the flow of the valve, all choose from top to bottom, so the installation of directional.
This type of shut-off valve is very suitable for blocking or conditioning and throttling. Because this type of valve stem open or closed stroke is relatively short, and has a very reliable blocking function, and because the change of the valve seat port and the stroke of the valve is proportional to the relationship, very suitable for the flow of conditioning.
The stop valve is designed to be low and high, so that the flow resistance is small and the effort is saved when the valve is opened. When the valve is closed together, the packing between the valve shell and the valve cover and the packing around the valve stem are not stressed, and the effect of medium pressure and temperature for a long time can prolong the service life and reduce the probability of leakage. Other such can also be replaced or increased in the state of the valve closed packing, easy to repair.
Not all stop valves are low in and high in. Generally, it is difficult to close the valve if low in and high in the large diameter and high pressure state. If low in and high in the large diameter of high pressure are selected, the valve stem will be simply deformed and tortuous by water pressure for a long time, affecting the safety and sealing of the valve. If you choose a high inlet and a low inlet, the diameter of the valve stem can be smaller, which will also save some costs for manufacturers and users.
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