Piston Vacuum Pumps

A Piston vacuum pump generates vacuum through the workings of a piston. We have written several in depth articles on the Piston Pump at: “Piston Vacuum Pump: The Ultimate Guide to WOB-L and ROC-R Vacuum Pumps” and “Selecting a Proper Vacuum Pump for your Acrylic Vacuum Chamber”

The main advantages of a piston pump are oil free operation, maintenance free, and no oil mist emission. This means that the vacuum pump is very popular in laboratory settings and indoor environments.

Wob-L Dry Vacuum Pump 115V 60HZ 1PH, 60 Torr at 3.5 CFM
Item #: WELCH-2567B-01
Welch, Dry, Oil Free Vacuum Pump featuring WOB-L technology. This particular model number is 2568BB-...More Info
Wob-L Oil Free Vacuum Pump with Inlet Trap and Gauge, 115V 60Hz 1Ph, 60 Torr at 3.5 CFM
Item #: WELCH-2567B-50
Welch, Dry, Oil Free Vacuum Pump featuring WOB-L technology. This particular model number is 2567B-5...More Info
Wob-L Dry Pump, 230V 50Hz 1Ph, CE, 60 Torr at 3.5 CFM
Item #: WELCH-2567C-02
Welch, Dry, Oil Free Vacuum Pump featuring WOB-L technology. This particular model number is 2567C-0...More Info
Wob-L Oil Free Pump with Inlet Trap and Gauge, 230V 50Hz 1Ph, with CE mark, 60 Torr at 3.5 CFM
Item #: WELCH-2567C-50
Welch, Dry, Oil Free Vacuum Pump featuring WOB-L technology. This particular model number is 2567C-5...More Info
Wob-L Dry Vacuum Pump with Inlet Trap and Gauge, 115V 60Hz 1Ph, with CE mark, 5 Torr at 2.3 CFM
Item #: WELCH-2561B-50
Welch, Dry, Oil Free Vacuum Pump featuring WOB-L technology. This particular model number is 2561B-5...More Info
Wob-L Oil Free Vacuum Pump with Inlet Trap and Gauge, 230 V 50 Hz 1 Ph, with CE mark, 5 Torr at 2.3 CFM
Item #: WELCH-2561C-50
Welch, Dry, Oil Free Vacuum Pump featuring WOB-L technology. This particular model number is 2561C-5...More Info
Wob-L Dry Pump with Inlet Trap and Gauge, 100V 50-60Hz 1Ph, 5 Torr at 2.3 CFM
Item #: WELCH-2561C-56
Welch, Dry, Oil Free Vacuum Pump featuring WOB-L technology. This particular model number is 2561C-5...More Info
Wob-L Oil Free Pump, 115V 60Hz 1Ph, 7.5 Torr at 2.3 CFM
Item #: WELCH-2562B-01
Welch, Dry, Oil Free Vacuum Pump featuring WOB-L technology. This particular model number is 2562B-0...More Info
Wob-L Dry Vacuum Pump, 230V 50Hz 1Ph, with CE mark, 7.5 Torr at 2.3 CFM
Item #: WELCH-2562C-02
Welch, Dry, Oil Free Vacuum Pump featuring WOB-L technology. This particular model number is 2562B-...More Info
Wob-L Oil Vacuum Free Pump with Inlet Trap and Gauge, 230V 50Hz 1Ph, with CE mark, 7.5 Torr at 2.3 CFM
Item #: WELCH-2562C-50
Welch, Dry, Oil Free Vacuum Pump featuring WOB-L technology. This particular model number is 2562C-5...More Info
Wob-L Dry Pump, 115V 60Hz, with UL, 5 Torr at 2.1 CFM
Item #: WELCH-2563B-24
Welch, Dry, Oil Free Vacuum Pump featuring WOB-L technology. This particular model number is 2563B-2...More Info
Wob-L Oil Free Pump, 230V, 60Hz, with CE, 5 Torr at 2.1 CFM
Item #: WELCH-2563C-24
Welch, Dry, Oil Free Vacuum Pump featuring WOB-L technology. This particular model number is 2563C-2...More Info
Wob-L Dry Vacuum Pump, 115V 60Hz 1Ph, 9 Torr at 3.5 CFM
Item #: WELCH-2580B-01
Welch, Dry, Oil Free Vacuum Pump featuring WOB-L technology. This particular model number is 2580B-0...More Info
Wob-L Oil Free Vacuum Pump with Trap and Gauge, 115-60Hz 1Ph, 9 Torr at 3.5 CFM
Item #: WELCH-2580B-50
Welch, Dry, Oil Free Vacuum Pump featuring WOB-L technology. This particular model number is 2581B-5...More Info
Wob-L Dry Pump, 230V 50Hz 1Ph, CE, 9 Torr at 3.5 CFM
Item #: WELCH-2580C-02
Welch, Dry, Oil Free Vacuum Pump featuring WOB-L technology. This particular model number is 2581C-0...More Info
Wob-L Dry Vacuum Pump, 115V 60Hz 1Ph, 5 Torr at 3.5 CFM
Item #: WELCH-2581B-01
Welch, Dry, Oil Free Vacuum Pump featuring WOB-L technology. This particular model number is 2581B-0...More Info
Wob-L Oil Free Pump, 115V 60Hz 1Ph, UL-CSA, NW25 with hose barb, 5 Torr at 3.5 CFM
Item #: WELCH-2581B-24
Welch, Dry, Oil Free Vacuum Pump featuring WOB-L technology. This particular model number is 2581B-2...More Info
Wob-L Dry Vacuum Pump, 115V 60Hz 1Ph, UL-CSA, Inlet trap, gauge, regulator with hose barb, 5 Torr at 3.5 CFM
Item #: WELCH-2581B-50
Welch, Dry, Oil Free Vacuum Pump featuring WOB-L technology. This particular model number is 2581B-5...More Info
Wob-L Oil Free Vacuum Pump, 230V 50Hz 1Ph, CE, NW 25 with hose barb, 5 Torr at 3.5 CFM
Item #: WELCH-2581C-24
Welch, Dry, Oil Free Vacuum Pump featuring WOB-L technology. This particular model number is 2581C-2...More Info
Wob-L Dry Pump, 230V 50Hz 1Ph, CE, Inlet trap, gauge, regulator with hose barb, 5 Torr at 3.5 CFM
Item #: WELCH-2581C-50
Welch, Dry, Oil Free Vacuum Pump featuring WOB-L technology. This particular model number is 2581C-5...More Info
Wob-L Oil Free Pump, 100V 50-60Hz 1Ph, CE, Inlet trap, gauge, regulator with hose barb, 5 Torr at 3.5 CFM
Item #: WELCH-2581C-56
Welch, Dry, Oil Free Vacuum Pump featuring WOB-L technology. This particular model number is 2581C-5...More Info
Wob-L Dry Vacuum Pump, 115V 60Hz 1Ph, 60 Torr at 7.1 CFM
Item #: WELCH-2585B-01
Welch, Dry, Oil Free Vacuum Pump featuring WOB-L technology. This particular model number is 2585B-0...More Info
Wob-L Oil Free Vacuum Pump with Inlet Trap and Gauge, 115V 60Hz 1Ph, 60 Torr at 7.1 CFM
Item #: WELCH-2585B-50
Welch, Dry, Oil Free Vacuum Pump featuring WOB-L technology. This particular model number is 2585B-5...More Info
Wob-L Dry Pump with Gauge, 115V 60Hz 1Ph, 60 Torr at 7.1 CFM
Item #: WELCH-2585B-55
Welch, Dry, Oil Free Vacuum Pump featuring WOB-L technology. This particular model number is 2585B-5...More Info
Wob-L Oil Free Pump, 230V 50Hz 1Ph, CE, 60 Torr at 7.1 CFM
Item #: WELCH-2585C-02
Welch, Dry, Oil Free Vacuum Pump featuring WOB-L technology. This particular model number is 2585C-0...More Info
Wob-L Dry Vacuum Pump with Inlet Trap and Gauge, 230V 50Hz 1Ph, with CE mark, 60 Torr at 7.1 CFM
Item #: WELCH-2585C-50
Welch, Dry, Oil Free Vacuum Pump featuring WOB-L technology. This particular model number is 2585C-5...More Info
Wob-L Oil Free Vacuum Pump, 115V 60 Hz, 1 Ph, 60 Torr at 10.6 CFM
Item #: WELCH-2595B-01
Welch, Dry, Oil Free Vacuum Pump featuring WOB-L technology. This particular model number is 2595B-0...More Info
Wob-L Pressure and Vacuum Dry Pump, 115V 60Hz 1Ph, 100 Torr at 0.75 CFM
Item #: WELCH-2522B-01
Welch, Dry, Oil Free Vacuum and Pressure Pump featuring WOB-L technology. This particular model numb...More Info
Wob-L Pressure and Vacuum Dry Pump, 230V 50Hz 1Ph, with CE mark, 100 Torr at 0.75 CFM
Item #: WELCH-2522C-02
Welch, Dry, Oil Free Vacuum and Pressure Pump featuring WOB-L technology. This particular model numb...More Info
Wob-L Pressure and Vacuum Dry Pump, 100V 50-60Hz 1Ph, 100 Torr at 0.75 CFM
Item #: WELCH-2522C-05
Welch, Dry, Oil Free Vacuum and Pressure Pump featuring WOB-L technology. This particular model numb...More Info
Wob-L Pressure and Vacuum Dry Pump, 115V 60Hz 1Ph, 70 Torr at 1.2 CFM
Item #: WELCH-2534B-01
Welch, Dry, Oil Free Vacuum and Pressure Pump featuring WOB-L technology. This particular model numb...More Info
Wob-L Pressure and Vacuum Dry Pump, 230V 60Hz 1Ph, 70 Torr at 1.2 CFM
Item #: WELCH-2534C-01
Welch, Dry, Oil Free Vacuum and Pressure Pump featuring WOB-L technology. This particular model numb...More Info
Wob-L Pressure and Vacuum Dry Pump, 230V 50Hz 1Ph, CE, 70 Torr at 1.2 CFM
Item #: WELCH-2534C-02
Welch, Dry, Oil Free Vacuum and Pressure Pump featuring WOB-L technology. This particular model numb...More Info
Wob-L Pressure and Vacuum Dry Pump, 115V 60Hz 1Ph, 60 Torr at 1.6 CFM
Item #: WELCH-2546B-01
Welch, Dry, Oil Free Vacuum and Pressure Pump featuring WOB-L technology. This particular model numb...More Info
WOB-L Pressure and Vacuum Dry Pump, 230V 60HZ 1PH, 60 Torr at 1.6 CFM
Item #: WELCH-2546C-01
Welch, Dry, Oil Free Vacuum and Pressure Pump featuring WOB-L technology. This particular model numb...More Info
Wob-L Pressure and Vacuum Dry Pump, 230V 50Hz 1Ph, with CE mark, 60 Torr at 1.6 CFM
Item #: WELCH-2546C-02
Welch, Dry, Oil Free Vacuum and Pressure Pump featuring WOB-L technology. This particular model numb...More Info