The normal operating condition of a liquid ammonia shielded pump is at negative pressure at the inlet; how then is the pump filled?
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For the liquid ammonia shielded pump of the Dalian Empire, with an inlet pressure of 64 KPaA, how should it be filled? After the pump is started, the outlet valve is gradually closed completely; what is the reason why the pressure at the pump outlet does not increase? TRG knowledge in the green area
Liquid ammonia has a saturated pressure at room temperature; how can there be negative pressure?
The liquid ammonia separator at the pump inlet operates under negative pressure, while the separator at the compressor inlet…
The inlet is under negative pressure; the liquid ammonia separator at the pump inlet operates under negative pressure conditions, as does the separator at the compressor inlet.-------Could the poster please provide more details? The pump outlet pressure does not increase-------This may be due to the vaporization of liquid ammonia, with insufficient liquid present.
The length of the pump inlet pipeline is about four meters, with two elbows, one filter, and one valve. The normal operating pressure in the separator is 64 KPaA, and the lift distance of the shielded pump is 246 m
Find a procedure for starting a canned motor pump; generally, the outlet is started several times to release air. If the pump still cannot build pressure, could there be an issue with the bearings?
Add a minimum flow line at the pump outlet that leads back to the separator at the inlet; by doing this, when filling the tank, open the minimum reflux valve and the inlet valve, which will balance the pressures at the inlet and outlet. Then start the pump a few times. After startup, close the minimum return valve completely.
Thank you. We have made the necessary adjustments, in line with your idea – we’ve added an exhaust pipeline from the pump outlet to the gas phase area of the separator