There is information regarding the relationship between the compressor circuit and the unloading valve
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For a reciprocating compressor with two-stage compression, the load needs to be reduced to 0 before shutting down. My question is: in the case of a compressor without variable control, can it be shut down directly by setting the compressor’s unloader to 0? Are the actions in round one and two, as well as round two again, still necessary?
The owner should be aware that the unloader acts on the air valve; although the unloader is set to the “0” position, the entire system remains in an external delivery state. Turning on Cycle 1 and Cycle 2 is done to keep the entire compressor system from operating, thereby disconnecting the compressor from the system. So, actions are still necessary for round one and one, as well as round two and two.
The unloader is already at 0 – how can it still function? Could you explain it in detail?
The unloader is off; it merely controls the air valve to prevent the intake valve from operating. The machine does no work. Open the circuit to protect the unit.