Feature and Function of Plug /Cock valve, safety valve, steam trap, pressure relief valve, check valve

5. Cock Valve

It refers to a kind of valve whose closing parts are plunger-shaped rotary valves. The opening or closing of the valve can be realized by 90 degree rotation to make the opening on the valve plug and the opening on the valve body open or separate. The shape of the valve plug can be cylindrical or conical. Its principle is basically similar to that of ball valves. Ball valves are developed on the basis of cock valves. They are mainly used in oil field exploitation and petrochemical industry.

invert pressure balance oil Lubricated APIplug valve 300LB

6. Safety valve

It is used as overpressure protection device in pressure vessel, equipment or pipeline. When the pressure in the equipment, container or pipeline rises above the allowable value, the valve opens automatically, and then discharges in full to prevent the equipment, container or pipeline and pressure from rising further. When the pressure drops to the specified value, the valve should be automatically closed in time to protect the safe operation of the equipment, container or pipeline.

spring Safety valve with lever
pressure relief valvebreath valve

7. Steam trap

In the medium of transporting steam and compressed air, some condensate water will form. In order to ensure the 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 water produced; 2) prevent the leakage of steam; 3) it can remove air and other non-condensable gases.

BSP Thread stainless steel thermodynamic type steam trap

8. Pressure relief valve

By adjusting, the import pressure is reduced to a certain required outlet pressure, and the outlet pressure is automatically stabilized by relying on the energy of the medium itself.

pressure relief valvebreath valve

9. Check Valve

Also known as countercurrent 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 medium itself in the pipeline and belong to an automatic valve. Check valves are used in pipeline systems. Their main functions are to prevent medium backflow, reverse pump and drive motor, and release of container medium. Check valves can also be used to supply pipelines for auxiliary systems where the pressure may rise to more than the system pressure. They can be divided into swing type (rotating according to the center of gravity) and lifting type (moving along the axis).

Aluminium bronze Lift checkvalveC95800 DN200 PN25

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