Advantages and disadvantages of various valves

Author:     Published time:2022-05-17 11:50     Reading times:85    


Plug valve: refers to a rotary valve whose closing part is in the shape of a plunger. Through 90 ° rotation, the channel port on the valve plug is connected or separated from the channel port on the valve body to realize opening or closing. The shape of the valve plug can be cylindrical or conical. Its principle is basically similar to that of ball valve. Ball valve is developed on the basis of plug valve. It is mainly used for oil field exploitation and petrochemical industry.


Safety valve: it refers to the overpressure protection device on pressure vessels, equipment or pipelines. When the pressure rise in the equipment, container or pipeline exceeds the allowable value, the valve will automatically open and then discharge in full, so as to prevent the continuous rise of the equipment, container or pipeline and pressure; When the pressure drops to the specified value, the valve shall be closed automatically and timely, so as to protect the safe operation of equipment, container or pipeline.


 Steam trap: some condensed water will be formed in the transmission of steam, compressed air and other media. In order to ensure the working efficiency and safe operation of the device, these useless and harmful media should be discharged in time to ensure the consumption and use of the device. It has the following functions: ① it can quickly remove the condensate produced; ② Prevent steam leakage; ③ Remove air and other non condensable gases.


Pressure reducing valve: it is a valve that reduces the inlet pressure to a required outlet pressure through regulation, and automatically keeps the outlet pressure stable by relying on the energy of the medium itself.


Check valve: also known as reverse flow valve, check valve, back pressure valve and one-way valve. These valves are automatically opened and closed by the force generated by the flow of the pipeline medium itself, which belongs to an automatic valve. The check valve is used in the pipeline system. Its main function is to prevent the backflow of medium, the reverse rotation of pump and driving motor, and the discharge of container medium. The check valve can also be used to supply the auxiliary system whose pressure may rise to more than the system pressure. It can be mainly divided into swing type (rotating according to the center of gravity) and lift type (moving along the axis).


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