What are the reasons for excessive exhaust pressure in a reciprocating compressor?
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The discharge pressure of the first stage (out of 3 stages) of our hydrogen reciprocating compressor is consistently too high; the safety valve has tripped several times. Experts, please analyze possible reasons for this issue – I would be extremely grateful
If the exhaust pressure at stage 1 is excessively high, check whether there is cross-ventilation in the suction and exhaust valves of stage 2. Is the gap between the piston ring and the cylinder excessive?
The safety valve behind the primary exhaust opens. One possible reason is an issue with the setting of the safety valve; another possibility is that the primary exhaust gas isn’t being drawn away by the secondary system, so it’s necessary to check the secondary intake and exhaust valves
Where is the safety valve located? Whether before or after the primary exhaust, I agree with the suggestion from above
Both the intake and exhaust valves have been checked; there is no leakage, only a small amount of lubricant. The gap should be fine, right?
The air valve is leaking, bro – let me tell you! ! I have encountered such a problem! ! ! ! !
It must be that the valve seal is damaged. Aren’t you using oil-free reciprocating compressors? ?
The reasons for the excessively high primary outlet pressure are: 1, there is a blockage between the primary outlet and the secondary inlet; 2, the secondary stage does not perform its function properly, so it is unable to absorb all of the gas discharged from the primary stage and send it to the next stage; 3, the cooling effect of the primary outlet cooler is inadequate. Suggestion: Calibrate the safety valve again. Additionally, if the secondary outlet temperature exceeds the limit, it indicates that the secondary work is not effective.
Why does poor performance of the primary heat exchanger lead to overpressure? Is it liquid-filled? The compressor makes no abnormal noises nor experiences significant vibrations, as there is no liquid present
The volumetric flow rate of the secondary inhalation remains unchanged, but the mass flow rate decreases; part of the gas is not drawn in by the secondary stage and remains between the primary outlet and the secondary inlet.