Thomas OEM Pumps and Compressors

The Thomas Division of Gardner Denver has been a world leader in the manufacture of OEM vacuum pumps, compressors and liquid pumps for over 50 years. Our innovation in design and technology has helped our customer create new innovative products and become leaders in their marketplace.

With manufacturing plants in Europe, North America and Asia and sales offices across the world, Thomas has one of the largest product ranges in the industry which utilises six operating principles; rotary vane, diaphragm, WOB-L piston, articulated piston, linear and peristaltic.

Gardner Denver Thomas realises the importance of the correct selection and application of products within OEM devices and machines. With our wide range of product technologies and application experience, all supported by a network of specialists who will provide face to face selection advice and samples, we can genuinely add value and experience that will align with your project needs and demands.

Rotary Vane Compressors and Vacuum Pumps

Dry running rotary vane pumps provide air flow by turning a slotted cylindrical rotor containing sliding vanes within an asymmetric chamber. The pumps develop high, dynamic flow for their size with little noise. They can be configured for minimising pulsation and maximising pressure or optimising flow but still maintaining a low pulsatility. There are AC and DC versions, the latter can allow reversible flow for certain models. Gas tight, magnetically coupled models are also available.

Free Flow Max: 283 l/min (10 cfm)
Max Pressure: up to 1 bar (15 psi)
Max Vacuum: -880 mbar gauge (26 in.Hg)

Diaphragm Compressors and Vacuum Pumps

Reciprocating diaphragm pumps operate by forcing air through valves by flexing a membrane, by means of a connecting rod mounted on a rotating eccentric. They provide a wide operating performance which can be tailored by altering the number, size and configuration of pump heads, size of the eccentric and motor speed. There are a variety of diaphragm geometries and materials to select to further configure the optimum pump for an application. Diaphragm pumps are ideal for applications requiring low external leakage.

Free Flow Max: 91 l/min (3.2 cfm)
Max Pressure: 2.8 bar (41 psi)
Max Vacuum: 10 mbar abs (7.5 Torr)

WOB-L Piston Compressors and Vacuum Pumps

WOB-L piston pumps operate by forcing air through valves adjacent to a cylinder using a rigid, connecting rod mounted on a rotating eccentric. A seal is maintained by a flexible piston ring or cup, there is no wrist pin as with an articulated piston pump. The performance can be tailored by altering the number, size and configuration of pump heads, eccentric size/connecting rod length or cylinder bore. This versatile technology provides a wide performance range.

Free Flow Max: 200 l/min (7.1 cfm)
Max Pressure: 11 bar (160 psi)
Max Vacuum: -940 mbar gauge (27.7 in.Hg)

Articulated Piston Compressors and Vacuum Pumps

The articulated piston units are constructed from PTFE or carbon piston rings and skirts also with high strength stainless steel valves, together with high capacity, permanently lubricated and sealed bearings. The robust design of the oil-less articulated piston compressor is suited to tough, long service free, industrial applications that require relatively high flow rates combined with pressure or vacuum. These compressors are available in AC (single or three phase) or DC versions.

Free Flow Max: 278 l/min (9.8 cfm)
Max Pressure: 12.1 bar (175 psi)
Max Vacuum: -930 mbar gauge (27.5 in.Hg)

Diaphragm Liquid Pumps

Reciprocating liquid diaphragm pumps operate by forcing liquid through valves by flexing a membrane, by means of a connecting rod mounted on a rotating eccentric. Performance can be tailored by altering the number, size and configuration of pump heads, size of the eccentric, motor speed and type. They are self priming, dry running and suitable for continuous operation. Some liquid pump options can be configured with anti-cavitation and pulsation options so that they deliver virtually a 'bubble free' flow which makes them ideal for applications such as ink jet printing.

Free Flow Max: 2200 ml/min
Suction Height: 6 mH2O
Pressure Height: 80 mH2O

Peristaltic Pumps

Peristaltic pumps provide excellent pumping solutions for abrasive, corrosive or viscous liquids. Their lack of valves makes them inexpensive to maintain and the tube materials, type and motor drive options can be selected in accordance with the process needs. Peristaltic pumps offer a low shear pumping action that is nearly pulsation free, they are self priming and their design also enables them to pump liquids containing entrapped air which means they are also safe to dry run. They are also reversible and their operating principle means they have no internal backflow (slip) making them ideal for dosing applications.

Free Flow Max: 3000 ml/min
Suction Height: 8 mH2O
Pressure Height: 10 mH2O

Linear Liquid Pumps

Linear liquid diaphragm pumps operate by forcing liquid through valves by flexing a membrane fitted to a reciprocating shuttle within a linear drive system. They offer a compact, long life, energy efficient and low sound level pumping options for low pressure applications. They are self priming and suitable for continuous operation, with certain models capable of dry running or being fitted with a flow stop device to deliver a very accurate flow; which makes them ideal for dowsing applications. With a variety of diaphragm materials, pump head and drive options to select it is possible to configure the optimum pump for an application.

Free Flow Max: 260 ml/min
Suction Height: 4.7 mH2O
Pressure Height: 8 mH2O

www.gd-alton.co.uk