Vacuum Gauge

[sirduke88]

I notice a vacuum port on my burner oil pump. I have a pressure gauge and run my pump at 10 bar. I have never used the vacuum port because I do not know its purpose.
I would like to know what a vacuum gauge records and what reading would be considered normal.
Would a vacuum gauge also show a problem ie. poor oil line flow (possibly caused by a blocked filter etc.)?
I would be grateful for any information. Thanks

 

[Bryan King]

You can use the vacuum port to check whether the oil line is sound as this is the suction side of the pump.You would probably not get a reading, or a slow falling reading if the oil supply pipe had any leaks in it