Regarding the interlock issue for starting and stopping the dry gas seal booster pump
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Why does the booster pump start when the compressor inlet pressure in the diagram is below 0.3 Mpa? How can this be explained? How to explain that it stops at 0.25?
You should ask the process department about this; check what requirements the process has, or look at the compressor design documents
A booster pump is primarily used when the pressure of the primary seal gas is lower than or equal to the seal pressure. Generally, before starting up, the primary seal gas consists of process gas, which is the pressure at the compressor inlet; this pressure cannot be higher than that in the seal chamber. Therefore, a booster pump is used to increase the flow rate. Prevents dirt from the compressor body from entering the seal.