Reciprocating compressor
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What is the reason and function for installing an outlet-to-inlet return line in a reciprocating compressor?
The return line is primarily a means of regulation when the inlet flow rate is too low
1. To supplement the inlet flow. 2. During startup, reduce the pressure; adjust the inlet pressure gradually, close the return line valve, and integrate the compressor into the system.
Supplementary inlet flow； Open before starting; start under no load so that the compressor does not work. Close the return line when loading is required
What are the consequences of low inlet pressure?
The reciprocating compressors here cannot be started with no load; they can only be started while under pressure. As for the issue you mentioned of the outlet returning to the inlet, it involves reducing the load, waiting until the compressor is operating properly, and then slowly closing it (one cycle at a time) in order to increase its efficiency and thus achieve the pressure required by the equipment later on.
It can be used for testing after power-on, as well as for adjusting the traffic of the supply system.
Start under pressure? A completely load-free start is difficult to achieve. The compression unit should be started with as low a load as possible. Where are the compressors you are using manufactured? What provides the power to the compressor?
Previous reciprocating compressors did not have load adjustment; they operated at full load all the time. This backflow was used to adjust the amount of air delivered, and its effect was significant when starting or stopping the compressor. The main causes of compressor surge are high outlet pressure, low inlet pressure, and low outlet flow rate. A check valve can resolve these issues; feel free to discuss