Angle stop valve manufacturer remind Electric gate valve Precautions for use and installation of
The gate valve can be installed on the horizontal pipeline or vertical pipeline, and the single and double gate valve should be installed on the horizontal pipeline, and the hand wheel should be located above the valve, which is not allowed to be installed downward. The flow direction of gate valve is not limited.
Gate valve is usually connected by flange, and welding connection is also used in special occasions.
For large diameter and high pressure gate valve, the opening and closing torque is large. In order to reduce the opening and closing torque, the bypass valve can be installed. The bypass valve is installed outside the main gate valve, and its inlet and outlet are connected in parallel with both sides of the main gate valve. Before the main gate valve is opened, the bypass valve should be opened first. After entering the valve, the pressure difference between the front and rear of the main gate valve will be reduced, so as to reduce the opening torque of the main gate valve. The diameter of bypass valve should be selected according to the main valve diameter and service requirements.
The gate valve is a block valve with poor sealing performance Globe valve 。 The main "duty" of the gate valve is to "cut off the flow", as well as with * small resistance: "continuous flow". It is not suitable for regulating the flow and pressure of the medium. If it is used for a long time, the sealing surface is easy to be eroded and worn by the medium, which will affect the sealing performance.
The medium temperature and pressure of the gate valve should be paid attention to. At high temperature and high pressure, the ram may die due to the change of temperature, and the non sealing phenomenon is easy to occur due to the uneven temperature of the medium. Wedge type, but the gate valve is particularly obvious.