About Holberg
Thread Content
A two-stage reciprocating compressor with variable-speed control; when there is a problem with the variable-speed control system, the compressor’s load increases to 100% and the bypass is fully open. How should this be understood? Since the compressors are already operating at full load, why is the bypass still fully open at this time?
It is mainly to ensure stable pressure in the reaction system. When the demand in the reaction system is low and the supply increases, the return volume must be high; the bypass valve is adjusted according to the actual conditions.
If there is a problem with the variable-speed control, the compressor, lacking a unloader, can only operate at 100% load. In such cases, if the processing volume is not 100%, there is a risk that the outlet overpressure safety valve will activate; therefore, the bypass valve must be opened. Additionally, since the outlet pressure of positive-displacement compressors changes very rapidly, it is necessary to fully open the bypass valve to prevent the safety valve from activating, after which the bypass valve can be adjusted manually to the appropriate position.