Thomas Vacuum Pumps


Thomas vacuum pumps and compressors are used in pharmaceutical and medical equipment, automobiles, business machines, environmental systems, and food processing equipment all over the world. Although their customers come from a variety of industries with varying applications, all share a common goal — a solution that enhances the performance of their product or application while still delivering the best value.Some examples of laboratory applications of Thomas pumps include aspiration, cell harvesting, concentrators, desiccation, filtration, pipettes, rotary evaporators, solvent degassing, tissue culture, vacuum concentrating and vacuum ovens.

Some examples of medical applications for Thomas pumps include aspirators, autoclaves, dental carts, dialysis machines, nebulizers and respirators.

Other applications for Thomas pumps include coffee making machines, drinks dispensers, ice cream dispensers, de-soldering, evacuation, fuel cells, impregnation, inkjet printing, photo copiers, photo processing, plasma cutters, spray tanning, water and sewage aeration, tooth whitening and vacuum holding.

Thomas uses a wide range of technologies for vacuum pumps and compressors which allows their products to be used in so many different areas. The main technologies are outlined below:


WOB-L Piston

Vacuum pumps designed with WOB-L piston technology reduce the volume in the pump chamber using a fixed crank operated piston inside the chamber


listCompact, reciprocating design for vacuum or pressure
listOil-less (dry), non-lube piston and cylinder
listLightweight die cast aluminum components or highly wear-resistant plastic
listSingle stage and multistage models
listBalanced for low vibration operation
listAll wetted aluminum parts treated for corrosion protection from moisture
listLong life, high performance piston seal
listPermanently lubricated bearings
listFlow rates up to 6.6 cfm (187 l/min), pressure to 160 psi (11 bar),
listvacuum down to 27.7 in.Hg (–940 mbar rel)


Diaphragm pumps operate by reducing the volume within the pumping chamber with a flexible membrane driven by a crank.


listSuitable for pressure and vacuum or combined
listGas tightness to the outside
listLightweight die cast aluminum components or highly wear-resistant plasticDurable plastic or corrosion resistant coated aluminum
listHigh variablility
listLong-life diaphragms
listBalanced for low vibration
listLow noise level
listLiquid media models available – suitable for aggressive media applications
listPermanently lubricated bearings
listFlow rates up to 91 l/min (3.2 cfm), end vacuum 29.2 in.Hg (10 mbar
abs.), pressure 2.8 bar (41 psi)

Articulating piston

Articulating piston pumps operate by reducing the volume in the pumping chamber using a sealed piston inside thae chamber.


listOil-less (Dry)
listSuitable as compressor or vacuum pump
listHigh capacity, permanently lubricated and sealed bearings
listPTFE or carbon piston rings and skirts
listLong, service-free life
listRobust design
listField service capability
listHigh strength stainless steel valves
listFlow rates up to 9.8 cfm (278 l/min), pressure up to 175 psi (12.1 bar), vacuum down to 27.5 in.Hg (-930 mbar)

Rotary vane

Rotary vane vacuum pumps and compressors work by compressing the volume within the pumping chamber to increase pressure and create vacuum.


listSuitable for pressure and/or vacuum
listOil-less (Dry)
listWetted parts out of gray cast iron, carbon, stainless steel and plastic
listSelf-lubricating and self-adjusting vanes
listGood controllability
listNearly pulsation free
listCompact design
listDC models with reversible operation
listFlow rates up to 21 cfm (595 l/min), pressure up to 14.5 psi (1.0 bar), vacuum up to 26 in.Hg (-880 mbar rel.)

Linear pumps

Linear pumps operate by reducing volume within the pumping chamber by the action of a shuttle upon a membrane or piston.


listVery long life
listOil-less (Dry)
listQuiet operation
listLow power consumption
listFluid capability with smaller models
listLow pulsation
listHigh efficiency
listNo bearings
listFlow rates up to 12.7 cfm (360 l/min), pressure up to 10 psi (0.7 bar), max vacuum 16.2 in.Hg (-550 mbar )