Welch Vacuum
Niles, IL 60714
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Dry Vacuum Pumps meet chemical-duty laboratory needs.
Featuring Advanced Vapor Management, DRYFASTÃ-® and DRYFAST ULTRAÃ-® offer precise control capability for distillation of organic solvents and applications handling aggressive vapors and gases. Units have solid PTFE heads and diaphragms, KalrezÃ-® valves, and fluorinated plastics on all wetted surfaces. Six models offer flows to 70 l/min and vacuum levels down to 2-torr. Stand-alone...
Read More »Aspiration Stations offer capacities up to 34 L/min .
With all wetted parts treated for corrosion protection, oil-free pumps include 1.2 L autoclaveable collection receiver as well as hydrophobic inline filter, automatic shutoff, and vacuum regulator to protect system. Compact combination aspiration and pressure pump, Model 2511, has 11 L/min capacity with up to 21.3 in. Hg plus 33 psig on pressure side. Suited for aspirating tissue cultures, Model...
Read More »
Diaphragm Pumps suit distilling, drying, and concentrating.
DRYFAST ULTRAÃ-® 2 Torr Chemical-Duty Models 2021 and 2031 are stand-alone units suited for tight spaces. Self-cleaning Dry Vacuum Models 2026 and 2027 feature integrated vacuum level control valve, analog or digital gauge, and gas ballast to inhibit vapor condensation. With flows to 32 L/min at 29.85 in. Hg, pumps are virtually maintenance-free and require no oil or water. All wetted...
Read More »
Vacuum Pumps suit filtration and aspiration applications.
Oil-free vacuum pumps, models 2522B-01, 2534B-01, 2546B-01, 2567B-50, 2561B-50, 2585B-50 and 2581B-50, are configured with inlet liquid trap, mounted vacuum gauge, muffler, and vacuum regulator. Utilizing Wob-L piston, pumps create flow and vacuum levels to 29.8 in. Hg, while high water vapor tolerance allows water vapor to pass through cleanly. They may be used with buffer solutions, but are not...
Read More »
Foot Switch provides hands-free pump control.
On/off foot switch control, Model 1430A plugs into any 115 V pump under 15 A with no connectors or fittings necessary. Made of black painted steel for continuous use, IP20-rated unit features nonskid base and foot treadle pads that ensure secure footing during repeated operations. Positive, over-center, rocker-type action requires only light pressure to operate. Eight foot line cord allows...
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Diaphragm Vacuum Pumps are rated for continuous duty.
DryFast Ultra 2-Torr chemical-duty diaphragm vacuum pumps, models 2021 and 2031, are oil-less, 2-stage pumps designed to strip solvents. With respective pumping capacities of 22 and 32 L/min, models 2021 and 2031 are rated for pressure to 29.8 in. Hg and generate flow and vacuum level needed to handle high boiling point solvents (less than 160Ã-
Read More »
Peristaltic Pump Systems are maintenance free.
Model 3100 and 3200 Liquid Pump Systems come with 25 ft of general PVC tubing to connect pump to application, 6 silicone tubing cartridge assemblies, pump, and pump head. With out-of-the-box functionality, systems can run dry, are self-priming, and may be sterilized. Features include bi-directional flow control potentiometer (Model 3100) and switch (Model 3200); max flow switch; universal...
Read More »
Dry Vacuum Pump System works with rotary evaporators.
Self-Cleaning Dry Vacuum System(TM) features diaphragm pump that resists chemical vapors by using fluorinated plastics on all wetted surfaces. Pump operates without oil, delivering vacuum to 12 mbar with free air displacement of 1.2 cfm. Self-cleaning purge automatically runs for 2 min at shutdown to rid pump of residue. Adjustable bleed valve allows regulation of vacuum level. Glass inlet...
Read More »
Dry Vacuum Pumps meet chemical-duty laboratory needs.
Featuring Advanced Vapor Management, DRYFASTÃ-® and DRYFAST ULTRAÃ-® offer precise control capability for distillation of organic solvents and applications handling aggressive vapors and gases. Units have solid PTFE heads and diaphragms, KalrezÃ-® valves, and fluorinated plastics on all wetted surfaces. Six models offer flows to 70 l/min and vacuum levels down to 2-torr. Stand-alone...
Read More »Aspiration Stations offer capacities up to 34 L/min .
With all wetted parts treated for corrosion protection, oil-free pumps include 1.2 L autoclaveable collection receiver as well as hydrophobic inline filter, automatic shutoff, and vacuum regulator to protect system. Compact combination aspiration and pressure pump, Model 2511, has 11 L/min capacity with up to 21.3 in. Hg plus 33 psig on pressure side. Suited for aspirating tissue cultures, Model...
Read More »
Diaphragm Pumps suit distilling, drying, and concentrating.
DRYFAST ULTRAÃ-® 2 Torr Chemical-Duty Models 2021 and 2031 are stand-alone units suited for tight spaces. Self-cleaning Dry Vacuum Models 2026 and 2027 feature integrated vacuum level control valve, analog or digital gauge, and gas ballast to inhibit vapor condensation. With flows to 32 L/min at 29.85 in. Hg, pumps are virtually maintenance-free and require no oil or water. All wetted...
Read More »
Vacuum Pumps suit filtration and aspiration applications.
Oil-free vacuum pumps, models 2522B-01, 2534B-01, 2546B-01, 2567B-50, 2561B-50, 2585B-50 and 2581B-50, are configured with inlet liquid trap, mounted vacuum gauge, muffler, and vacuum regulator. Utilizing Wob-L piston, pumps create flow and vacuum levels to 29.8 in. Hg, while high water vapor tolerance allows water vapor to pass through cleanly. They may be used with buffer solutions, but are not...
Read More »
Foot Switch provides hands-free pump control.
On/off foot switch control, Model 1430A plugs into any 115 V pump under 15 A with no connectors or fittings necessary. Made of black painted steel for continuous use, IP20-rated unit features nonskid base and foot treadle pads that ensure secure footing during repeated operations. Positive, over-center, rocker-type action requires only light pressure to operate. Eight foot line cord allows...
Read More »
Diaphragm Vacuum Pumps are rated for continuous duty.
DryFast Ultra 2-Torr chemical-duty diaphragm vacuum pumps, models 2021 and 2031, are oil-less, 2-stage pumps designed to strip solvents. With respective pumping capacities of 22 and 32 L/min, models 2021 and 2031 are rated for pressure to 29.8 in. Hg and generate flow and vacuum level needed to handle high boiling point solvents (less than 160Ã-
Read More »
Peristaltic Pump Systems are maintenance free.
Model 3100 and 3200 Liquid Pump Systems come with 25 ft of general PVC tubing to connect pump to application, 6 silicone tubing cartridge assemblies, pump, and pump head. With out-of-the-box functionality, systems can run dry, are self-priming, and may be sterilized. Features include bi-directional flow control potentiometer (Model 3100) and switch (Model 3200); max flow switch; universal...
Read More »
Dry Vacuum Pump System works with rotary evaporators.
Self-Cleaning Dry Vacuum System(TM) features diaphragm pump that resists chemical vapors by using fluorinated plastics on all wetted surfaces. Pump operates without oil, delivering vacuum to 12 mbar with free air displacement of 1.2 cfm. Self-cleaning purge automatically runs for 2 min at shutdown to rid pump of residue. Adjustable bleed valve allows regulation of vacuum level. Glass inlet...
Read More »