Low outlet pressure problem of centrifugal pump
Thread Content
Ordinary centrifugal pump, with water as the medium. The normal outlet pressure is 8 kilograms. Today, I suddenly noticed that the outlet pressure had dropped to 4 kilograms. The current also decreases at the same time. On-site inspection ruled out equipment issues; opening the outlet for back flushing to vent gas had no effect, and no cavitation was observed. After stopping the pump and restarting it, everything returned to normal. What could be the reason for this?
There must be air in the pump inlet pipeline; it can’t be removed through the start-up drain
Is your outlet pressure gauge connected behind the check valve?
The pump keeps running, and the outlet drain valve has been opened, but it doesn’t work – the pressure still doesn’t rise
If there is gas in the inlet pipeline, open the outlet for backwashing to drain the liquid – why doesn’t that work?
Is it a problem with the pressure gauge?