Thomas vacuum pumps vacuumThomas 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

Thomas WOB-L Piston Vacuum Pump Technology vacuum

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

  • Compact, reciprocating design for vacuum or pressure
  • Oil-less (dry), non-lube piston and cylinder
  • Lightweight die cast aluminum components or highly wear-resistant plastic
  • Single stage and multistage models
  • Balanced for low vibration operation
  • All wetted aluminum parts treated for corrosion protection from moisture
  • Long life, high performance piston seal
  • Permanently lubricated bearings
  • Flow rates up to 6.6 cfm (187 l/min), pressure to 160 psi (11 bar), vacuum down to 27.7 in.Hg (–940 mbar rel)


Thomas diaphragm vacuum pump technology vacuum

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

  • Suitable for pressure and vacuum or combined
  • Gas tightness to the outside
  • Durable plastic or corrosion resistant coated aluminum
  • High variablility
  • Long-life diaphragms
  • Balanced for low vibration
  • Low noise level
  • Liquid media models available – suitable for aggressive media applications
  • Permanently lubricated bearings
  • Flow rates up to 91 l/min (3.2 cfm), end vacuum 29.2 in.Hg (10 mbar abs.), pressure 2.8 bar (41 psi)

Articulated Piston

Thomas articulated piston vacuum pump technology vacuum

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

  • Oil-less (Dry)
  • Suitable as compressor or vacuum pump
  • High capacity, permanently lubricated and sealed bearings
  • PTFE or carbon piston rings and skirts
  • Long, service-free life
  • Robust design
  • Field service capability
  • High strength stainless steel valves
  • Flow 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

Thomas rotary vane vacuum pump technology vacuum

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

  • Suitable for pressure and/or vacuum
  • Oil-less (Dry)
  • Wetted parts out of gray cast iron, carbon, stainless steel and plastic
  • Self-lubricating and self-adjusting vanes
  • Good controllability
  • Nearly pulsation free
  • Compact design
  • DC models with reversible operation
  • Flow 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.)


Thomas linear vacuum pump technology vacuum

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

  • Very long life
  • Oil-less (Dry)
  • Quiet operation
  • Low power consumption
  • Fluid capability with smaller models
  • Low pulsation
  • High efficiency
  • No bearings
  • Flow 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 )