The function and basic performance of pressure reducing valve of compressed air
Filter, pressure reducing valve and oil mist together constitute a pneumatic triplet. The filter is mainly responsible for filtering liquid water, oil and impurities in the compressed air, the pressure reducing valve is mainly responsible for controlling the pressure of the system, and the oil mist is responsible for the lubrication of the back-end components. In general, oil mist is not used much, because now there are many products can be done without oil lubrication, there is no need for oil mist.
Compressed-air filter: remove solid impurities, water droplets and oil droplets in the compressed air, can not remove the gaseous oil, water.
According to the filter drainage, manual drainage type. Automatic drainage according to no pressure drainage state, there are normally open and closed type.
Pressure reducing valve role: pressure reducing valve is a kind of use of the media to regulate their own energy and control the pressure of the intelligent valve pipeline, through the pressure relief valve guide valve, can regulate the main valve outlet pressure. The outlet pressure does not change with the change of inlet pressure and inlet flow, so the outlet pressure can be safely and reliably maintained on the set plant, and the set value can be adjusted according to the need to achieve the purpose of reducing pressure.
Basic performance of pressure reducing valve:
(1) Pressure regulating range: it refers to the adjustable range of pressure-reducing valve output pressure P2, within which the specified accuracy is required. The regulating range is mainly related to the stiffness of the regulating spring.
(2) Pressure characteristic: It refers to the characteristic of output pressure fluctuation caused by input pressure fluctuation when the flow rate G is fixed. The smaller the output pressure fluctuation, the better the performance of the relief valve. The output pressure must be lower than the input pressure-constant to be essentially unchanged by the input pressure.
(3) Flow characteristics: it refers to the input pressure - timing, output pressure with the output flow g changes with the change of the durability. When the flow rate G changes, the smaller the output pressure change, the better. Generally, the lower the output pressure, the smaller the fluctuation with the output flow.