Hi, recently bought EC.4 and I have few questions whether it's normal and expected from this pump. Sorry for possibly stupid questions My old vacuum pump is oil-less so I'm kinda new to this pump.

Pump was filled with oil which came with vacuum pump up to half of the sight-glass.

1. When pulling vacuum oil vapor separator looks like this. It settles down as soon as full vacuum is reached. Is it supposed to work like that? Catch oil and collect it in the container?

2. When full vacuum is reached oil has lots of air bubbles. They disperse when pump is off. Is it normal?

3. What is the purpose of return check valve? I thought it was supposed to hold vacuum when pump is off. But as soon as I switch pump off - vacuum gauge drops to zero and you can hear air being sucked back to the vacuum pump through oil mist separator. So is the valve for holding vacuum or just for keeping oil getting sucked back into the tubing?

Thanks

If you are pulling down a large bag or against a leaky bag, sometimes you can exceed the separator's capacity to filter.  In essence it drains down through a small hole in the bottom and once full of oil it needs a minute or so to drain down.  Under typical load or once under a full vacuum you should not notice any issues with the separator.


Warren Penalver
Easy Composites / Carbon Mods - Technical Support Assistant