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 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.

• One of the most respected names in the petroleum industry with a diverse group of durable pumps used in oil and natural gas drilling production, well servicing and stimulation.
• Articulating piston pumps work by reduction of a volume using a sealed piston within a cylinder. Flow rates up to 5.4 cfm (152.9 l/min), pressure up to 175 psi (12.1 bar)

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.

• The C-Series claw pumps and compressors of Elmo Rietschle generate contact-free vacuum or compressed air efficiently and economically. This is possible because of the principle of internal compression. The gas is pre-compressed within the compressing chamber and is then discharged.
• Truck mounted gear or lobe cargo pumps for discharging a wide range of liquids from road tankers. Performance range: 80 to 1000 l/min.

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.

• Welch-Ilmvac provide high quality vacuum pumps and systems for laboratory, life science, chemical, refrigeration and light industrial applications.
• Truck mounted gear or lobe cargo pumps for discharging a wide range of liquids from road tankers. Performance range: 80 to 1000 l/min.
• Gear, centrifugal, chemsteel and rubber impeller pumps for use in industrial, marine and chemical applications. Performance range: flow 0 – 200 gpm (0 – 662 l/m), pressure 0 – 500 psi (0 – 34.5 bar).

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.

• One of the most respected names in the petroleum industry with a diverse group of durable pumps used in oil and natural gas drilling production, well servicing and stimulation.
• L-Series – Compact Liquid Ring Pumps for Heavy Duty Extreme conditions, which prevail in humid and wet processes, lead to lime scale or abrasion, and hence to a considerable reduction in the performance of the pump. Elmo Rietschle liquid ring pumps, however, meet these challenges.
• Liquid ring vacuum pumps have the features and performance necessary for all demanding applications. Performance range: 20 to 23000 cfm (34 to 40,000 m³/hr), vacuum levels to 29+" HgV (30 mbar abs).
• Centrifugal pumps suitable for the conveyance of clear or slightly cloudy, chemically inert or aggressive liquids and of solutions with suspended crystals or fibrous materials, mainly used in the chemical and petrolchemical industry.

Oil & Gas Pumps

With over 150 years experience in the industry the Gardner Denver pumps team are passionate about the pumps it manufactures and supports. We are the only company that offers both drilling and well-servicing solutions.

Innovation and evolution is a key driver for us, we strive to improve and extend the performance and lifetime of our pumps and accessories

• One of the most respected names in the petroleum industry Gardner Denver offer a diverse range of durable pumps used in oil and natural gas drilling production, well servicing and stimulation. Pumping Perfected is our obsession

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.

• Peristaltic pumps work by reduction of a volume within a tube by a series of rollers. Flow rates up to 3000 ml/min, suction height up to 8 m H 2 0, pressure height up to 10m H20

Positive Displacement

Positive displacement pumps 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.

• One of the most respected names in the petroleum industry with a diverse group of durable pumps used in oil and natural gas drilling production, well servicing and stimulation.
• Robust and economical, Dry running, Modular design, Available as single aggregates, Available as individually engineered pump sets, Frequency control available

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

• The triple lobed rotors avoid pulsation problems. The blowers are customized to cater for the varying demands of our customers‘ applications.

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.

• One of the most respected names in the petroleum industry with a diverse group of durable pumps used in oil and natural gas drilling production, well servicing and stimulation.
• S-Series – The Screw: dry running and low maintenance vacuum pump The S-VSI screw vacuum pump (sizes 100 and 300) represents modern, state-of-the-art dry running technology that excels when it comes to small carbon footprint and low life cycle costs. It is used in a variety of industrial applications such as drying and packaging.
• Centrifugal pumps suitable for the conveyance of clear or slightly cloudy, chemically inert or aggressive liquids and of solutions with suspended crystals or fibrous materials, mainly used in the chemical and petrolchemical industry.
• Truck mounted gear or lobe cargo pumps for discharging a wide range of liquids from road tankers. Performance range: 80 to 1000 l/min.

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.

• Rotary vane and compressors and vacuum pumps operate by compressing volume in order to increase pressure and create vacuum. Flow rates up to 10 cfm (283 l/min), Pressure to 160 psi (11 bar)
• Welch-Ilmvac provide high quality vacuum pumps and systems for laboratory, life science, chemical, refrigeration and light industrial applications.
• Truck mounted gear or lobe cargo pumps for discharging a wide range of liquids from road tankers. Performance range: 80 to 1000 l/min.
• Welch-Ilmvac provide high quality vacuum pumps and systems for laboratory, life science, chemical, refrigeration and light industrial 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.