I would like to ask an expert about issues related to dry gas (nitrogen) sealing~
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As shown in the diagram, this is a dry gas seal system for one of our company’s multi-stage (10-stage) horizontal centrifugal pumps, which serves as a backup to the mechanical seal. What are components 1, 2, and 3 in the diagram respectively? What is its function? And if the seal leaks and the pressure gauge shows a sudden increase, what actions should be taken to mitigate the leak? Please ask an expert for help, thank you! !
Pressure relief valve, rotor, shut-off valve – I’ve never used these. There might be a certain pressure range within which they can operate; if that range is exceeded, it triggers a repair request
If the pressure indication on the gauge suddenly increases, and this indicates a seal leak, then there is a mechanical issue to be addressed. How to operate it? What this pressure gauge indicates is that there is a problem with the seal, rather than indicating that the pressure needs to be reduced manually. It’s just as foolish as having an oil level warning light on a car’s dashboard and instead of refilling the tank, going to a 4S store to fix the dashboard. For that small glass rotor, there are requirements regarding the height indicated by the rotor inside; you can ask someone who is familiar with it.
Are 1 to 3 what you mean?
I asked because when the seal leak was discovered, I saw the managers releasing the gas shown in Figure 2 on site; that’s why I asked. Thank you for your explanation :)
I’ve never seen anything like this on a dry gas seal! Only know pressure relief valves
1. Rotameter, used to adjust the flow rate of nitrogen 2. Pressure regulator valve 3. Main nitrogen valve
Intake valve, pressure reducing valve, gas flow meter (the round ones below are valves)