Your process will operate well with either a Self cleaning PTFE diaphragm vacuum pump or basic PTFE diaphragm vacuum pump. The self cleaning vacuum pump has additional accessories, including a pressure gauge, anti-bumping switch, inlet and exhaust catch-pots and cleans itself after use. The basic PTFE diaphragm pump below will work for your process. The choice is a matter of preference. Click on your preference of pump below.