Top mounted pipe relief breathing valve
A pressure reducing valve is a mechanical device used to regulate and control the pressure of a fluid or gas to ensure the safe operation of pipes and equipment.
The working principle of the pressure reducing valve is mainly based on the principle of fluid mechanics, by changing the throttle area to change the flow rate and the kinetic energy of the fluid, resulting in different pressure losses, so as to achieve the purpose of decompression. At the same time, relying on the adjustment of the control and adjustment system, the fluctuation of the pressure behind the valve is balanced with the spring force, and the pressure behind the valve is kept constant within a certain error range.
There are many types of pressure reducing valves, and the selection needs to be determined according to media, temperature, pressure and other conditions.Pipe Away Pressure Vacuum Breather Valve Common types of pressure reducing valves include direct acting film reducing valves, pilot film reducing valves, pilot piston reducing valves and pilot bellows reducing valves.
Medium selection: for normal temperature media such as water or air, direct acting film reducing valve and pilot film reducing valve can be selected; For high temperature media such as steam, pilot piston pressure reducing valve or pilot bellows pressure reducing valve should be used.
Temperature consideration: When the operating temperature of the medium is high, pilot piston pressure reducing valve or pilot bellows pressure reducing valve is usually used.
Installation position: In order to facilitate operation, adjustment and maintenance, the pressure reducing valve should generally be installed on the horizontal pipeline.
Installation note: The inlet pressure fluctuation of the pressure reducing valve should be controlled within 80%-105% of the inlet pressure setting value. At the same time, the outlet pressure of the pressure reducing valve should generally be less than 50% of the inlet pressure to obtain a better decompression effect.
Maintenance: Check and maintain the pressure reducing valve regularly, including cleaning the dust and debris on the valve, checking the wear of the valve disc and seals. In addition, it is also necessary to pay attention to the influence of factors such as the selection, installation position and use conditions of the pressure reducing valve on its performance.
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