Pumps

Miniature PumpsMedical PumpsMud PumpsPharmaceutical PumpsHigh Pressure Pumps

Gardner Denver is one of the leading pump manufacturers in the world. We offer a diverse range of pumps from drilling, well servicing and stimulation pumps which are reciprocating positive displacement pumps built on crankshaft or eccentric shaft designs, through to truck mounted liquid pumps for discharging liquids from road tankers and WOB-L Piston, Diaphragm, Rotary Vane, Articulated Piston, Linear and Peristaltic and centrifugal pumps used in medical, laboratory, life science and chemical applications.

Our full line of pumps and extensive experience allows us to offer our customers the right pump for any application.

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.

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.

Gear

Gear pumps use the meshing of gears to produce flow through means of displacement. They excel at efficiently pumping high viscosity liquids, such as asphalt, adhesives, and other chemicals.

Gear pumps can be classified as either internal gear pumps or external gear pumps and represent one branch of positive displacement pumps.

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.

Peristaltic Pumps

Gardner Denver’s state-of-the-art peristaltic pump technology offers low maintenance, application specific solutions to meet a wide variety of needs. With more than 150 years of experience within the compressor and pump industry, Gardner Denver has always focused on the critical design parameters. This allows peristaltic pumps to deliver optimal performance and a much longer productive life. Take a look at our Brands that manufacture Peristaltic Pumps below, click to find out more or visit the branded website.

Positive Displacement

Positive displacement compressors take advantage of positive displacement technology; which causes movement by trapping a fixed amount of air then forcing (displacing) that trapped volume into the discharge pipe. Positive displacement technology can be further classified according to the mechanism used to move air.

Rotary Lobe

Rotary lobe blowers and rotary lobe pumps belong to the group of dry running positive displacement pumps. There is no need for oil or grease in the compression chamber. Only gear box and bearings, which are separated from the pumping chamber, are oil lubricated.

Air enters the inlet opening into a conveying cell formed by the two rolling pistons in the housing. The cell is then separated from the inlet by the following piston head. The air in the cell is conveyed without reduction until it reaches the outlet, where air with a higher absolute pressure flows from the pressure chamber into the following cell, and must then be discharged. It is during this stage of the conveying that external compression takes place

Rotary Screw

Gardner Denver offers two types of products using screw technology. There are rotary screw pumps, which are dry running screw vacuum pumps which excel when it comes to small carbon footprint and low life cycle costs. They are mainly used in customized systems for the chemical and pharmaceutical industry and in a modified industrial version for food packaging, industrial parts cleaning and in the manufacturing of solar panels.

In many applications, compressed air has become active and in processes where air comes into contact with the process it serves, the quality of that air becomes critical.Our oil free screw compressors, or rotary screw air compressors, constitute the second type of products featuring the screw technology.

Rotary screw technology uses a displacement principle where the screw compression element main parts comprise male and female rotors that move towards each other while the volume between them and the housing decreases. The pressure ratio of a screw is dependent on the length and profile of the screw and of the form of the discharge port. The screw element is not equipped with any valves and there are no mechanical forces to create any imbalance. It can therefore work at high shaft speed and combine a large flow rate with small exterior dimensions.

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.

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.