3 Pumps Stacked

VP67 - 6 CFM Vacuum Pump

What's the difference between the VP67 / VP87 / VPX7?

Why is there vapor coming out of the pump?

How often do I need to change the oil?

Do I have to use fieldpiece oil?

Why is my oil cloudy?

How do I know that my vacuum pump can pull down sufficiently?

What are the sizes of the ports?

What is the gas ballast and when do I use it?

Can the vacuum pump pull a vacuum for A3/NH3 refrigerant systems?

Does the Vacuum pump have an anti-suck back oil system?

What is the final recovery vacuum?

What type of oil is used with the machine?

How many stages do the vacuum pumps have?