TRIVAC D8A Vacuum Pump

[@Aussie50]

looking in the related vids. I see they are part of Oerlikon, a a company I often hear about when talking about small caliber AA guns (20mm) from WWII. good to see they are still around.

[@EnergyFabricator]

That's a nice piece of kit there! The filter on the exhaust is called an SE Smoke Eliminator. It's main purpose is to reduce pump fluid/oil loss due to pressure differences between the atmosphere and pump. You can still get replacement elements for these. The model # is RE 8-16 and the part number for the element you would need is 99 171 129. The chamber on the vacuum side looks like a foreline trap. It goes in-line between your pump and chamber to mitigate the back migration of pump oil into the chamber you just exhausted or into your diffusion pump. The reason you had some oil in the bottom of that chamber is because it was caught by the trap before it got into the chamber. It then falls back into the pump via gravity (if it is indeed a foreline trap). I would not recommend using HVAC oil...I'd suggest to call a company like Javac for more pump oil. I'm pretty sure they deal in leybold products and they should have some OEM or equivalent oil in stock.

[@alex993cc1]

thanks EF! your a legend! :) i wonder if this thing will pump down far enough to run a small fusor in demonstrator mode :)

[@EnergyFabricator]

alex993cc1 No worries. It has a pumping speed of around 5cfm or 8.5m3/h... it won't create a black hole, but it will definitely get you a demo fusor. I'm pretty sure it can get to 10-3 or even 10-4 mbar depending on ballast, chamber etc.. Call Javac - they can at least give you some advice regarding the oil... who knows, maybe you CAN use HVAC oil... you could call AVT Services too. They don't do Leybold stuff (they sell BOC/Edwards) but they might have another brand of cheaper oil. Coz oils ain't oils! PS - I wouldn't run the pump when it is not connected to a chamber or when the vacuum port is not blanked off. Some rotary vane vacuum pumps are not liking it! I'm not sure about yours though... ask your nearest Javac representative :)

[@heavydiesel]

Awesome find! I would think normal refrigeration vac pump oil would work in it, but could be wrong. Sometimes when you have a deep vacuum it seems to send oil vapour back up the inlet, theres no flow as vacuum has bottomed out and the oil vapour can go back out the inlet (at least that is my understanding)

[@Aussie50]

Awesome vac pump!, HVAC shops sell vac pump oil!. not sure if the oil is any different to air comp oil tho.

[@alex993cc1]

cheers mate, i'll find out!

[@MrMacman98]

Good stuff! You could try making steel drums and glass bottles implode with it!

[@anderj101]

The oil is a synthetic silicone-based oil designed for vacuum pumps. A search for vacuum pump oil should give you some results.

[@WilliamVG]

Will these Trivac pumps work fine for AC evacuation or are these pumps better suited for other applications? I found a cheap Trivac d4a in the classifieds.

[@zx8401ztv]

Ooow thats an odd setup, large holes in the filters so cant be for trapping dust, and a filter on the output that doesnt really do anything. Do you think there are two foam cylinders missing from the filters?

[@alex993cc1]

not sure mate, not sure :)

[@zx8401ztv]

alex993cc1 You mean you dont know everything in the world, im disgusted ha ha :-))

[@HDXFH]

Nice find!!!

[@gizzo123us]

nice score!!!

[@rotarycomptech]

There should be a check valve on the inlet someone may have replaced it with that check valve that may be the reason for oil in that inlet filter. speaking of the inlet filter what ever application they were using that for must have been hard on the pump or people around it. I think the exhaust filter element it the wrong type it looks like what would go on the inlet side. You can run that pump on 30 WT non detergent.

[@alex993cc1]

thanks mate! i'll look into it!

[@wilkes982]

pingpong cannon

[@Systemrat2008]

Not sure what you have there but it might be a carbon vane vacuum pump. They are typically used in scientific applications. As the name suggests the pump itself is made up by carbon blocks which rotate against a fixed outer surface. You should take great care NOT to allow any contaminants like sand as an example etc into the intake or it will have a very short life. Nice find these things are not cheap if that's what it is.

[@alex993cc1]

online literature suggests twin vane pumps. not sure about the carbon part, and yes, i'll always use it with a filter :) thanks for the info!

[@Systemrat2008]

alex993cc1 No problem. Sorry if the filter bit sounded like captain obvious but I did a lot of work on scientific gear and that was a major risk with carbon pumps self destructing. :-)

[@rotarycomptech]

Vacuum pump with carbon vanes are oil free