Universal Gear Pump

Why choose us

Company strength

Our company covers an area of 26,000 square meters, with 5 CNC machining centers; 6 CNC lathes; 6 CNC milling machines; 5 CNC grinders; and 30 other CNC equipment.

Professional team

We have an excellent and experienced workforce capable of providing customers with high-quality products, professional technical consultation and comprehensive services.

Our certifications

Now it has more than 20 patents, passed ISO9000 certification, and its products have passed CE certification.

Advanced equipment

Our company has advanced production and testing equipment to provide you with the best products.

 

What is Universal Gear Pump

 

 

Universal gear pumps are one of the most popular types of positive displacement pumps. They tend to be compact in size and have minimal moving parts.they utilize gears, sometimes called rotating cogs, to transfer fluids. The two gears produce a seal and creates suction to the inlet side, fluid is drawn into the pump and then the gears rotate moving the liquid to the outlet port. As the gears rotate they separate on the intake side of the pump, creating a void and suction which is filled by fluid.

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Universal gear pump with the good fluid compatibility, is widely used in different industries, 

and which shows excellent preformance except acidic, strong alkaline, and chloride fluid.

Specially for the isocyanate, polyether polyols, two components A and B, epoxy resin or sodium silicate

 

Benefits of Universal Gear Pump
 

Precise flow control

Universal gear pumps are known for their ability to provide accurate and consistent flow rates. Offering unrivaled control over the flow of fluids, gear pumps are suitable for applications requiring tight process control.

Compact size

Depending on the model type, universal gear pumps are relatively compact. Their small footprint supplies an advantage in low flow processing when space might be limited. The innovative design allows for easy integration of gear pumps into existing systems or installation in tight spaces.

Self-priming capability

Universal gear pumps are self-priming, meaning they create a suction to draw fluid into the pump without the need for additional priming mechanisms. If you need to maintain a steady flow of fluid, then self-priming is not a luxury, it is essential.

High efficiency

Universal gear pumps achieve high volumetric efficiency, minimizing energy consumption and reducing operating costs. Their efficiency is particularly advantageous in processes where energy efficiency is a priority.

Low shear

Universal gear pumps generate minimal shear forces on the pumped fluid, making them suitable for handling shear-sensitive materials or delicate substances. Low flow is advantageous when it involves sensitive fluids or products that cannot suffer damage or degradation.

Wide range of compatible fluids

Gear pumps are compatible with countless fluids, from ultrathin to highly viscous liquids, leveraging their versatility in various low flow applications across different industries. Gear pump features and capabilities

 

Application of Universal Gear Pump
 

Chemical industry
Gear pumps are widely used in the chemical industry to handle various chemicals, including corrosive and abrasive substances. Their ability to handle high pressures and maintain a consistent flow makes them ideal for transferring chemicals in manufacturing processes.

 

Oil and gas industry
Universal gear pumps play a crucial role in the oil and gas industry for applications such as fuel transfer, lubrication, and hydraulic systems. They are capable of handling different types of oils, fuels, and lubricants, making them essential in maintaining the smooth operation of machinery and equipment.

 

Food and beverage industry
Universal gear pumps are used in the food and beverage industry for transferring viscous fluids such as syrups, chocolate, and sauces. Their gentle pumping action ensures that delicate food products are not damaged during the transfer process.

 

Automotive industry
Universal gear pumps are utilized in automotive applications for tasks such as engine lubrication, transmission fluid circulation, and fuel transfer. They provide reliable and consistent fluid flow, contributing to the efficient operation of vehicles.

 

Pharmaceutical industry
Universal gear pumps are employed in the pharmaceutical industry for the transfer of various liquids, including medications, solvents, and suspensions. Their sanitary design and ability to handle different viscosities make them suitable for pharmaceutical processes.

 

Agriculture and irrigation
Universal gear pumps are used in agricultural applications for tasks such as fertilizer spraying, pesticide application, and irrigation. Their ability to handle different types of fluids and generate high pressures makes them valuable for efficient agricultural practices.

 

Types of Universal Gear Pump

 
 
01
 

GP1 Gear pumps

These pumps achieve a displacement volume of one to 9.8 cubic centimeters per rotation. In addition, they impress with high operational reliability and long service life. The GP1 gear pumps belong to our latest generation of pumps with improved efficiency and reduced noise. All models are made of a high-quality aluminum alloy and are available with various connection arrangements and dimensions. Multiple pumps are also available if required.

 
02
 

GP2 Gear pumps

For a slightly larger displacement volume, you can choose the GP2 gear pumps. The series achieves a displacement volume of 4.5 to 32 cubic centimeters with each rotation. Gearwheels with twelve teeth each operate in the slightly larger housings for this purpose. As a result, the GP2 series operates with above-average quietness. The housing made of a high-quality aluminum alloy is complemented by a cast iron cover and flange for extra durability.

 
03
 

GP3 Gear pumps

In this series you will find gear pumps with a displacement volume between 22.5 and 60 m3/rev. It is manufactured as robust and durable as the other series.

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Components of Universal Gear Pump
 

Housing or Casing

The housing, often made of metal or cast iron, contains the other components of the gear pump and provides structural support. It also includes inlet and outlet ports for fluid flow.

Gears

Gear pumps have two main gears that are typically of the same size. One gear is the driving gear, connected to a motor or an engine, and the other is the driven gear. These gears are precisely machined and have well-defined teeth that mesh together as they rotate.

Shafts

Shafts connect the gears to the drive source (e.g., an electric motor or an internal combustion engine). The driving gear is mounted on the input shaft, while the driven gear is mounted on the output shaft. The shafts transmit rotary motion from the drive source to the gears.

Bearings

Bearings support the shafts and reduce friction between moving parts, allowing for smooth rotation. Proper bearing lubrication is essential to prevent wear and overheating.

Inlet and Outlet Ports

The pump housing has inlet and outlet ports that allow fluid to enter and exit the pump. The design and placement of these ports depend on the specific application and requirements.

Seals and Gaskets

Seals and gaskets are used to prevent fluid leakage from the pump. They are placed at various points within the pump, including around the gears and shafts.

 

 
 
The Operation of a Gear Pump Can Be Broken Down Into Several Steps
B Series Epoxy Resin Universal Gear Metering Pump

Inlet Phase

When the gears begin to rotate, fluid is drawn into the pump through the inlet port. As the gears continue to turn, the space between the gear teeth and the pump housing increases, creating a low-pressure area that allows fluid to flow in.

Special Stainless Steel Metering Pump For Resin Sand Mixer

Outlet Phase

Once the fluid reaches the outlet side, it is pushed out of the pump through the outlet port. The meshing of the gears and the reduction in volume between the gear teeth and the housing force the fluid out of the pump.

High-quality Carbon Structural Steel Gear Metering Pump For Furan Resin

Transport Phase

As the gears rotate further, the fluid becomes trapped in the spaces between the gear teeth and the housing. The rotating gears carry the trapped fluid from the inlet side to the outlet side.

Special Stainless Steel Metering Pump For Resin Sand Mixer

Repeating Cycle

This process repeats with each rotation of the gears, resulting in a continuous flow of fluid. The volume of fluid moved per rotation is determined by the size and geometry of the gears.

 

 
Some Practical Skills Of Gear Pump Maintenance
 

 

 
Wear of driving shaft and bushing

When the driving shaft and bushing of the gear pump are worn, the matching clearance will increase, which will inevitably affect the oil volume of the pump. In this case, the normal fit clearance can be restored by repairing the driving shaft or bushing. If the driving shaft is slightly worn, just press out the old bushing and replace it with a standard bushing, and the fit clearance can be restored to the allowable range. If the driving shaft and bushing are seriously worn and the fit clearance exceeds the standard, not only the bushing shall be replaced, but also the diameter of the driving shaft shall be increased by chromium plating or vibration surfacing, and then ground to the standard size to restore the fit requirements with the bushing.

 
Repair of lubricating oil pump shell repair of shell crack

Shell cracks can be repaired with cast 508 nickel copper welding rod. The weld must be tight and free of air holes, and the flatness error of the joint surface with the pump cover shall not be greater than 0.05mm.

 
Repair of pump cover

Repair of working plane: If the working plane of the pump cover is slightly worn, the wear trace can be eliminated by manual grinding, that is, put a little valve sand on the platform or thick glass plate, and then put the pump cover on it for grinding until the wear trace is eliminated and the working surface is flat. When the wear depth of the working plane of the pump cover exceeds 0.1mm, it shall be repaired by turning first and then grinding.

 
Overturning of gears

The gear wear of gear pump is mainly at the tooth thickness, while the wear of gear end face and tooth top is relatively light. The gear is worn on one side at the tooth thickness, so the gear can be turned 180 degrees for use. When the gear end face is worn, the end face can be ground flat, and the joint surface of the lubricating oil pump housing can be ground at the same time to ensure that the clearance between the gear end face and the pump cover is within the standard range.

 

 

 
Our Factory
 

Jinan Hai Rui Te Mechanical CO., LTD was founded in 2005. Our talented and experienced staff can provide products with good quality, professional technical consult, and perfect service to our clients. "Keep improving " is a principle we always insist. More than sixty percent of the company staff have bachelor or higher university degrees. Now We have more than 20 patents, passed ISO9000 certification, and our products have passed CE certification. As a professinal fluid service provider, we only manufacture and sell quality products. Clients can rest assured our products and services will solve all their fluid metering problems efficiently and economically.

 

 

 
Certificate
 

 

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FAQ
 

 

 

Q: What is the principle of operation for gear pumps?

A: Gear pumps operate on the principle of positive displacement. They use meshing gears to trap and transfer fluid from the inlet to the outlet, delivering a fixed volume of fluid per revolution.As the gears on the suction side rotate, the volumetric space between their gear teeth increases. Fluid enters the space/cavities between the teeth due to the negative suction pressure within the cavities. As the gears rotate further, fluid within the cavities becomes trapped between the gears and casing.

Q: What are the main types of gear pumps?

A: The main types of gear pumps are external gear pumps (including spur, helical, and herringbone gear pumps) and internal gear pumps (including rotary gear pumps and lobe pumps).External gear pumps are commonly used for pumping water, light oils, chemical additives, resins or solvents. They are preferred in applications where accurate dosing or high pressure output is required. External gear pumps are capable of sustaining high pressures.

Q: Where are gear pumps commonly used?

A: Gear pumps find applications in various industries, including automotive, chemical processing, food and beverage, oil and gas, pharmaceuticals, and manufacturing, due to their versatility and precision.Some of the pump types you don't want to run dry include piston/plunger, centrifugal, progressive cavity, rotary lobe and gear pumps.

Q: What are the advantages of gear pumps?

A: Gear pumps offer precise flow control, high-pressure capability, a wide viscosity range, compact design, and durability.High-quality pumps that are well-maintained can achieve efficiencies of 90% or higher, while smaller pumps tend to be less efficient. In general, if you take good care of your pumps, you should be able to achieve 70-90% pump efficiency. Motor efficiency is also an important factor here.

Q: What are the disadvantages of gear pumps?

A: Gear pumps have limited suction lift capabilities, may not be suitable for shear-sensitive or abrasive fluids, and can produce noise and vibration.The frequent failures of gear pumps are mainly due to small flow, no oil absorption, insufficient pressure, high noise, oil leakage, overheating, abnormal operation of the oil pump or seizure, etc. The causes and solutions for the failure are introduced as follows.

Q: How can gear pumps be maintained?

A: Maintenance of gear pumps involves regular inspections, lubrication, seal replacement, gear alignment checks, and cleaning to ensure proper performance and longevity.

Q: What are common troubleshooting issues with gear pumps?

A: Common troubleshooting issues with gear pumps include leakage, low flow rate, excessive noise/vibration, overheating, and cavitation. Addressing these issues promptly is essential to maintain pump performance.

Q: Why can't a gear pump handle water?

A: Internal gear pumps on the other hand are used for high viscosity liquids, like fuel oils, polymers, resins, food products, or inks and paints. While internal gear pumps wouldn't be so suited to low viscosity liquids like water, external gear pumps are commonly used for the task.

Q: How to increase pressure in gear pump?

A: To increase the output pressure of the gear pump, it is necessary to reduce the clearance. When the gear rotates at high speed, the friction will increase, and the gap will become larger after a period of time, and the pressure will increase.It is calculated by measuring the fluid flow rate and pressure, and the driver input power. Pump Efficiency = Pump Hydraulic Power divided by Pump Shaft Power.

Q: What causes suction of fluid into the gear pump?

A: Fluid enters the pump on the suction side. As the gears on the suction side rotate, the volumetric space between their gear teeth increases. Fluid enters the space/cavities between the teeth due to the negative suction pressure within the cavities.

Q: What is the flow rate of a gear pump?

A: The rate of flow of a gear pump is the quantity of fluid actually delivered per unit of time, including both the liquid and any dissolved or entrained gases, at stated operating conditions. Most 4000 series pumps are volumetrically efficient to at least 80%.External gear pumps are commonly used for pumping water, light oils, chemical additives, resins or solvents. They are preferred in any application where accurate dosing is required such as fuels, polymers or chemical additives.

Q: Can you cavitate a gear pump?

A: Cavitation in gear pumps is a common issue that can cause significant damage if not addressed promptly. Cavitation occurs when the pressure of the fluid drops below its vapor pressure, causing the formation of vapor bubbles.

Q: What are gear pumps used for?

A: Due to their design, gear pumps are often used for transporting high viscosity fluids, especially in the chemical industry. Gear pumps have two gears that separate on the intake side of the pump. This creates a partial vacuum, creating suction which draws fluids into the pump.

Q: How to reduce gear pump pressure?

A: A gear type oil pump is a constant displacement pump, you can also change its delivered volume by varying its speed. Assuming a fixed outlet resistance, changing the pumps driven speed will either increase or decrease the outlet pressure.

Q: What happens when the rpm of a gear pump is increased?

A: Gear pumps (or positive displacement pumps) displace a specific volume of fluid per revolution of the shaft. When the shaft spins faster, you get more volume of liquid out of the pump. Standard motor speed designs are 3600 RPM, 1800 RPM, and 900 RPM.

Q: What is another name for a gear pump?

A: A Gear Pump, also called a positive displacement pump, or a spin pump, consists of two inter-meshing gears within a metal housing. These gears rotate within the spin pump housing creating pressure that pushes the fluid through the pump, a process commonly referred to as positive displacement.

Q: Are gear pumps noisy?

A: As we mentioned above, typical mechanical pump noise commonly originates from grinding gear teeth but due to the pumps hydraulic function, the turbulence of hydraulic fluid travelling through the pump can also contribute to noise levels with fluid getting trapped between gear teeth and also flow pulsation.

Q: What is the squeezing in gear pumps?

A: After the liquid enters the discharge chamber, the gear teeth of the two gears continuously mesh, so that the liquid is squeezed and enters the discharge pipe from the discharge chamber. The driving gear and the driven gear rotate continuously, and the pump can continuously suck and discharge liquid.

Q: What is the minimum rpm for a gear pump?

A: Gear pumps are the most popular type of positive displacement pump. Small gear pumps usually operate at a speed between 1,700 rpm and 4,500 rpm, and larger models most often operate at speeds below 1,000 rpm. A gear pump produces flow by carrying fluid between the teeth of two meshing gears.

Q: What is the life expectancy of a gear pump?

A: Gear pump design life index is 5000 hours working under rated conditions, but there are significant differences due to different installation and use conditions, such as CB-KPG63 pump, under the working conditions of 21MPA pressure and 2000 rpm, 10,000 hours of continuous operation, no abnormalities have been found.
We're well-known as one of the leading universal gear pump manufacturers and suppliers in China for our quality products and competitive price. Please feel free to buy bulk universal gear pump made in China here from our factory.Rotary Gear Pump, Motor Gear Pump, Gear Pump With Motor

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