How is the nitrogen filling pressure for the accumulator in PLAN53B determined?
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How is the nitrogen filling pressure for the accumulator in PLAN53B determined? How many kilograms is appropriate to charge? Are there any rules? Should it be higher or lower than the pressure in the sealed chamber? When replenishing fluid with a fluid feeding pump, is the bladder of the accumulator flattened? So is the pressure of the sealing oil simply the reaction force generated by the oil supply from the bladder?
The nitrogen charging pressure in the accumulator of the air compressor unit’s oil system is generally 60% of the oil supply pressure, in order to ensure pressure stability during a failure of the oil pump and when the auxiliary oil pump starts up automatically.
Precharge with nitrogen at 75%~90% of the isolation hydraulic pressure. Our company usually charges it to 80%
Is it the pressure of the isolation fluid or the pressure in the sealing chamber? How is the isolation fluid pressure determined?
Check the instructions and set it based on practical experience.
It’s of course the isolation fluid pressure. The pressure of the isolation fluid is usually the pressure in the sealing chamber plus 0.2~0.3 MPa
1. Check the instruction manual and make settings based on the actual operating conditions.
It is generally around 80% of the liquid pressure; you can also check the manual or API682
First, determine the pressure in the sealing chamber; based on this value, the pressure of the isolation fluid is then determined. The pressure of the isolation fluid is generally equal to the pressure in the sealing chamber plus 0.2 MPa. Additionally, 70% of the pressure of the isolation fluid corresponds to the pressure in the air bag of the 53B system