Gear Pumps & Gear Pump Suppliers
What is a gear pump?
Gear pumps are considered rotary positive displacement pumps. Gear pump are most common type of positive displacement pump. Like all positive displacement pumps, gear pumps are fixed displacement pumps, meaning that an unchanging volume of liquid moves through at a constant rate provided the pump speed is constant.
Gear pumps generally work within the following ranges:
- Flow rate ranges between 1 and 1,500 gpm
- Total head (pressure) ranges between 10 and 2,500 psi
- Horse power ranges between 0.5 and 2,000 hp
- Viscosity ranges from clear liquids to 2 million SSU
How do gear pumps work?
A gear pump uses a rotating set of gears, which are spur or helical for standard types of gear pumps, and herringbone gears for specialty applications. The moving gears create suction at the inlet port of the pump that draws the fluid into the gears. The rotating gears then move the liquid between the teeth of the gears and the walls of the casing and direct the fluid flow to the discharge port, where the pressure continues to build as the volume of the casing gets smaller near the outlet of the pump.
There are two main types of gear pumps. Both consist of a drive gear (the gear that pushes) and an idler (the gear that is pushed). External gear pumps, which are usually found in lower flow applications, use two side-by-side spur, helical, or herringbone gears that mesh together; while internal gear pumps consist of a smaller idler gear that fits inside of the larger drive gear. Internal gear pumps also contain a crescent-shaped internal barrier that helps direct flow through the pump. Both gear pump types often contain built-in pressure relief valves to protect the pump and the system in the event that a valve in the discharge piping is inadvertently closed.
Where are gear pumps used?
Well-made gear pumps have very tight clearances and are ideal for thicker, high viscosity fluids. Though they’re sometimes used to pump water, gear pumps are more commonly used to pump thicker fluids such as automotive oils, plastics, paint, adhesives, or soaps.
Here are a few gear pump manufacturers to consider.
Heavy duty compact gear pumps offered by AMT Pump Company use type 2100 seal for pressures up to 150 psi. Model GMC1DE3 is available with Totally Enclosed Fan cooled (TEFC) or explosion proof 1.5 hp motors for use in the pulp & paper industry, food industry, chemical process and petrochemical industry.
Anchor Sales distributes centrifugal pumps and PD pumps for the industrial, process, water treatment, fire protection, utility markets and more. Anchor Sales offers 26 different pump types including: Gear Pumps, Slurry Pumps, Horizontal Split Case Pumps, Trash Pumps, Magnetic Drive Pumps, Peristaltic/Hose Pumps, Submersible Pumps.
Apex Pumping Equipment is a pump distributor located in Sugar Grove, IL. APEX Pumping Equipment, Inc. offers 18 different pump types including: Gear Pumps, Horizontal Split Case Pumps, Metering Pumps, Multistage Pumps, Booster Pumps, Submersible Pumps, Diaphragm Pumps.
Arizona Pump & Equipment is a distributor of pumps, motors, drives, controls, and more throughout the state of Arizona. Arizona Pump & Equipment offers 37 different pump types including: Gear Pumps, Booster Pumps, Slurry Pumps, End Suction Pumps, Grinder Pumps, Canned Motor Pumps, API Pumps.
Chemac, Inc. sells the Gather Industries magnetic drive gear pump which is available in stainless steel, titanium, Teflon, carbon, and other material. The pump is magnetically coupled, hermetically sealed to prevent leaks, and allows for liquid temperatures from minus 60 degree F. to 315 degrees F.
CLYDEUNION Pumps makes industrial pumps for the upstream and downstream oil, industrial, water, mining applications and more. CLYDEUNION Pumps offers 24 different pump types including: Gear Pumps, Slurry Pumps, Screw Pumps, Plunger Pumps, Submersible Pumps, Trash Pumps, Multistage Pumps.
DNS Company is a pump distributor and pump rep for several pump manufacturers. DNS Company offers 35 different pump types including: Gear Pumps, Canned Motor Pumps, Self-Priming Pumps, Slurry Pumps, AODD Pumps, Axial Flow Pumps, Jet Pumps.
Dynaflow Engineering is a producer of gear pumps, including its G3000, G4000, G5000, G6000 model gear pumps and more. The pumps are used in dozens of applications including the transferring of hazardous chemicals, pumping hot vegetable oil and much more.
Flight Works, Inc. manufactuers miniature gear pumps able to handle flow rates to 20 gpm and pressures up to 300 psi.
Fluid-o-Tech manufacturers magnetic drive and plastic gear pumps for the food processing, water purification, cooling systems, surgical equipment and many other applications. The company offers several gear pump models including the MGFR series mag drive gear pump, MG200 series, and FG100 series to name a few.
Gorman-Rupp manufacturers several gear pumps in medium duty, heavy duty, and extreme duty models. Gorman-Rupp's GMS, GMC, GHA, GHC, and GHS series rotary gear pumps are available in cast iron, cast steel, and stainless steel material.
Hoffman-Kane Distributors, Inc. distributors pumps and pump parts, seals, gaskets and more. The company is located in Bethel Park, PA. Hoffman-Kane Distributors, Inc. offers 11 different pump types including: Gear Pumps, AODD Pumps, Circulator Pumps, Slurry Pumps, ANSI Process Pumps, End Suction Pumps, Horizontal Split Case Pumps.
K-Tek International sells and services Hyundai Heavy Industries pumps for the desalination, petrochem, power plant and other markets. K-Tek International offers 12 different pump types including: Gear Pumps, Screw Pumps, Vertical Sump Pumps, Slurry Pumps, Vane Pumps, Concrete Pumps, Horizontal Split Case Pumps.
Kraissl Company manufacturers a line of oil transfer pumps. The company offers its model 60EMD direct drive series and model 60E(S)RD reduction drive internal gear pumps. Both pumps operate with standard pressure up to 100 PSIG.
Tencarva Machinery sells pumps and equipment for the industrial and municipal markets. Tencarva Machinery offers 35 different pump types including: Gear Pumps, API Pumps, Plunger Pumps, Jet Pumps, End Suction Pumps, Well Pumps, Vertical Sump Pumps.
Viking Pumps manufacturers a full line of both external and internal gear pumps. The company's extensive line of external gear pumps are built with many different configurations to handle a wide range of applications. The company's SP External Gear Pump Series is made of either cast iron or ductile iron construction and has a capacity of up to 200 gpm and 500 psi. Viking also offers an extensive line of internal gear pumps including its Heavy Duty Internal Gear Pump series available in cast iron, steel, and 316 stainless steel construction with a max capacity of 1500 gpm and up to 200 psi.
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Industry Updates
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Pump Tweets
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