CAREERS INVESTORS CONTACT US GD WORLDWIDE PRODUCTS & Brands OUR Company OUR Industries Product Types Brands Overview Products Overview Air Audits Blowers Compressors Dry-Break Couplings Ejectors Fueling Systems Loading Arms Priming Valves Pumps Safety Access Equipment Storage Tank Equipment Tank Truck Equipment Transmissions & PTOs Vacuum Pumps & Systems Water Jetting VACUUM PUMPS & SYSTEMS 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 vacuum pump 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. CLAW Dry running claws generate contact free vacuum or compressed air efficiently and economically. This technology is used in claw pumps, claw vacuums and claw compressors among other machines. They offer process-safe and reliable operation at fairly low noise levels. Typical applications can be found in wood processing, wastewater treatment and the packaging and printing industries. They are also commonly used in pneumatic conveying and central vacuum systems. Claw pumps consists of two rotors. They turn in opposite directions without contact. As the claw moves over the suction connection and the axial suction channel inlet the gas is sucked into the compression chamber. As the rotors revolve, the gas moves from the suction side to the pressure side. Then it is compressed by the reduction of the volume between the rotors until the lower rotor uncovers the discharge channel. This “internal compression” leads to high differential pressures at efficiencies of more than 60%. Afterwards the pre-compressed gas is discharged via the pressure connection. To remove the heat generated by the compression process, cooling air is sucked in between the compression housing and a silencing cover before it leaves the pump. DIAPHRAGM 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 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. WOB-L 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. WORLDWIDE With locations in 34 countries, Gardner Denver is strategically positioned to support its customers anywhere in the world. FIND YOUR LOCAL GD SUPPORT Copyright 2014 © Gardner Denver, Inc. Terms of Use / Privacy Policy // Sitemap