Why is the first-stage packing of the reciprocating compressor not hot, while the second stage is hot? ? ?

Has it always been like this, or did you only notice it recently?

Is there a problem with the second-stage valve?

There are several reasons for heat generation in the filler: 1. Consider whether the inter-stage heat exchange in the second stage of the gas supply system is adequate, as well as whether there is scaling, leakage, or other issues. 2. The compression ratio of the second stage should be appropriate – it should not be too high, as this can lead to overheating in that stage and a loss of mechanical balance； Or the secondary air valve is leaking. 3. Check whether the cooling water for the secondary packing is flowing properly, as well as the water temperature. 4. The installation gap for the secondary packing is too small, resulting in high friction and temperature (this can be determined by the temperature of the piston rod and the color of its surface). 5. The secondary packing has failed and is leaking (this can be detected through gas leakage and the temperature of the piston rod). 6. Issues within the secondary cylinder or other problems

It has nothing to do with the gas valve; the gas valve is in good condition

Thank you; the manufacturer came to help, but the problem still wasn’t resolved. We suspect it’s a problem with the quality of the filler

The high temperature of the secondary filler has no direct relation to the primary filler; it is necessary to check the issues with the secondary filler. Assemble strictly in accordance with the requirements. Next, check the secondary intake temperature and the secondary piston rings.