There’s a problem with the lubricating oil pump
Thread Content
When lubricating oil pump A started, pump B began to rotate in the reverse direction. When lubricating oil pump B was operating, pump A remained in its standby mode. The cause of this issue could not be determined, and since it was necessary to start the equipment as soon as possible, pump B was used first. Experts, what is the reason for pump B rotating in the reverse direction when pump A is started?
The outlet valve of pump B is leaking, or the outlet check valve is damaged
The lubricating oil pump is a screw pump. The outlet valve of pump B is normally open, and the outlet check valve was also removed for inspection and found to be in good condition; a new one was installed later, and the same situation persisted
The lubricating oil pump is a screw pump. The outlet valve of pump B is normally open, and the outlet check valve was also removed for inspection and found to be in good condition; a new one was installed later, and the same situation persisted
This outcome occurs only when a malfunction in the check valve causes liquid to flow back; it seems that no issues were found with the damaged check valve, right? It would be best to send a video or diagram showing the local process in the county town. Facilitates discussion.
It may be due to improper design by the manufacturer; it is necessary to discuss this with them. Running a screw pump in reverse poses safety risks
Is the reverse rotation of Pump B severe? Are there any other pipelines in front of the check valve at the outlet of Pump B?
Swap the check valve of pump A to pump B and see if it still reverses
That’s a good idea; I can give it a try if I get the chance
This phenomenon has never occurred before; it was discovered during the last drive for oil system interlock testing