The core functions of Atlas Copco MPV C40
Establishing the minimum system pressure
After the compressor starts, the MPV C40 remains closed until the pressure in the oil-gas separator reaches the set minimum pressure (usually 4-5 bar), which will then open to ensure that the lubricating oil can circulate smoothly (pushed into the main bearing and rotor meshing surface by the pressure difference), avoiding poor lubrication due to insufficient pressure.
Thermal control feature
Compared with ordinary minimum pressure valves, the constant-temperature MPV C40 integrates a temperature sensing element, which can automatically adjust the valve opening or the opening timing according to the temperature of the compressed air, optimizing the efficiency of oil-gas separation:
At low temperatures (such as cold start), it delays opening to help the system quickly warm up and reduce the generation of condensate water;
At high temperatures (such as full-load operation), it precisely controls the pressure to avoid overloading of the oil-gas separator.
Oil-gas separation system protection
Preventing the reverse flow of compressed air from the downstream pipeline back to the oil-gas separator when the compressor is unloaded or shut down, to avoid abnormal fluctuations in oil level or reverse impact of the mixed gas of oil and gas on the separation element (such as the oil separator core), and extend its service life.
Stable downstream pressure
After being activated, it can stably output pressure, reducing pressure fluctuations caused by compressor loading/unloading, and ensuring the stability of downstream gas-using equipment.
Atlas Copco MPV C40 structure and working principle
main structure: composed of valve body, valve core, spring, temperature sensor (constant-temperature control unit), seals, etc., usually installed between the oil-gas separator outlet and the system pipeline.
Atlas Copco MPV C40 working logic:
Startup stage: The spring force causes the valve core to close, and the pressure in the oil-gas separator gradually increases;
Atlas Copco MPV C40 reaches the set pressure + temperature condition: The valve core overcomes the spring force to open, and the compressed air enters the downstream system through the outlet;
Atlas Copco MPV C40 shutdown / unloading: The valve core closes under the action of the spring force, blocking the reverse flow.
