When using secondary seal gas for a series-connected dry gas seal, it is recommended to activate it once the pressure inside the machine is 0.85 MPa higher than the flare pressure. What does this mean?
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When using secondary seal gas for a series-connected dry gas seal, it is recommended to activate it once the pressure inside the machine is 0.85 MPa higher than the flare pressure. What does this mean?
This post was last edited by foam_ZPTK on 2018-9-23 23:19; 0.85 MPa is quite a high pressure
There is a concern that a negative pressure difference may arise due to the first-level seal, which could damage the seal after it starts operating
No, it means that the system pressure should be 0.85 MPa higher than the torch pressure
Prevent flare gas from flowing back into Stage 1, thus avoiding the entry of contaminants
The flare gas should not flow back into Stage 1, as there are check valves on the discharge lines leading to the flare. The owner can check what the opening pressure of these check valves is; they should open when the internal pressure reaches 0.85 MPa or higher, allowing the gas to be discharged to the flare
It is estimated that if the pressure inside the machine is too low, the premature activation of stage 2 could lead to the sealing gas from stage 2 leaking into stage 1 and causing contamination