Vacuum Pumps & Systems

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Gardner Denver is a leading global provider of high quality industrial equipment, technologies and services. Our engineering expertise, coupled with worldwide manufacturing and service capabilities, ensure the most reliable, energy efficient products in the industry with the lowest life-cycle cost.

Gardner Denver designs, manufactures and markets highly engineered reciprocating, rotary and vane compressors, liquid ring pumps and blowers for various industrial and transportation applications. In addition Gardner Denver supplies pumps used in the petroleum and industrial markets, and other fluid transfer equipment serving chemical, petroleum, and food industries.

Its products and engineered solutions are sold through multi-channel, worldwide distribution systems and are used for applications in virtually every market sector.

Articulated Piston

The articulated piston compressor utilizes the same operating principle as a conventional car engine piston. The articulated piston transfers rotational energy from a motor pulley into a reciprocating motion used to compress air in a cylinder.

As the piston moves down inside the cylinder, air is drawn in through a one-way intake valve. On the upward stroke, this air is exhausted through a one-way exhaust valve. Sealing of the piston to the cylinder is achieved by using two piston rings each backed with a spring to keep them in contact with the cylinder wall. A piston skirt is also used to guide the piston in the cylinder.


A claw pump utilizes a dry running technology that generates contact free vacuum or compressed air efficiently and economically due to the principle of internal compression. Claw pumps offer a wide spectrum of performance while providing considerable energy savings compared to the traditional rotary lobe design.

The claws feature an optimized, high precision shape that rotate together without contact, synchronized by a precision gear set. The compression is contact-less and oil free. Special seals separate the compression chamber and gearbox keeping the gear lubricant isolated from the compression chamber.

The claw rotors control the transportation of the compressed gas by opening and closing the inlet and outlet channels.


Gardner Denver’s innovative Diaphragm Pump Technology has been providing outstanding value in the pumping, compression industry for over 50 years. Our world class engineering team designs application specific diaphragm pumps that boast extremely high levels of quality and reliability in the business. If you have a need, large or small, Gardner Denver has a solution.  Select from the list of Brands below to find out more

Liquid Ring

Liquid ring pumps and compressors utilize rotating positive displacement technology and are typically used in liquid ring vacuum pump applications, but can also be used as a gas, or liquid ring compressor. These sturdy pumps are built for heavy duty, wet and humid applications where most other pumps' performance will drop due to abrasion and lime scale from the process. The larger liquid ring pumps are often part of engineered systems designed to meet even the highest demands.

This is how they work: the impeller rotates friction free within the pump casing. A rotating liquid ring seals the impeller on the front and seals its blades against one another. In order to keep the liquid ring stable, liquid is also permanently sucked into the compression chamber and is output together with the conveyed gas. The excentrical arrangement of the impeller within the casing creates variable compression chambers between the impeller blades during rotation, which causes the conveyed gas to be compressed within a full revolution.

Rotary Vane

Rotary Vane pumps and rotary vane compressors cover a wide performance range and come in dry running and oil lubcricated versions. The eco-friendly dry running rotary vanes are robust and economical needing little maintenance. The oil lubricated rotary vanes are the standard pump in numerous industrial applications.

In rotary vane technology, the rotor, the only continually moving part, has a number of slots machined along its length into which fit sliding vanes that ride on a film of oil. The rotor rotates within a cylindrical stator. During rotation, centrifugal force extends the vanes from their slots, forming individual compression cells. Rotation decreases the cell volume, increasing the air pressure. Its compact size makes it the ideal choice for customised compressed air and gas applications.


Screw pumps are primarily used in applications across many different industries where clean, oil free vacuum is needed. The dry and contact free operation requires no lubrication in the pumping chamber leading to no process contamination and no pollution caused by the pump operation.

In the pump housing, two parallel screw rotors, both timing gear synchronized, turn in opposite directions without friction and at very tight clearances. Gas is compressed in the direction of the discharge port. Cooling is achieved using a water cooled outer chamber.


The WOB-L principle has a unitary piston rod that 'wobbles' inside the cylinder as the crankshaft rotates. Unlike the more conventional articulated piston pump, the piston and piston rod are a single item, usually a single casting. The piston rod is mounted to an eccentric bearing assembly, which in turn is mounted to the motor shaft to convert rotary energy from the motor into linear motion of the piston within the cylinder.

The piston is sealed to the cylinder by a flanged disk cup that forms both a seal and mechanical guide for the piston. It runs without lubrication in contact with a low friction, surface coated cylinder of high heat conductivity. As the piston is driven up and down, air resistance on the upward stroke expands the disk's seal on the piston against the cylinder wall to increase its efficiency, while compensating for the 'wobble' action.