Power Energy Gulf supplies gear pumps for industrial customers in Saudi Arabia and the GCC, including gear metering pumps and gear transfer pumps from Pompe Cucchi. Gear pumps are positive displacement pumps that deliver a steady, repeatable flow of oils, resins, solvents and chemicals, which makes them one of the most widely used pumps in process plants.
Gear Pump Types We Supply
- Gear metering pumps. Precise, repeatable dosing of additives, resins, oils and chemicals, with smooth, low-pulsation flow.
- Gear transfer pumps. Reliable movement of lubricating and viscous liquids from tank to process, drum to tank or truck to storage.
- External gear pumps. Two meshing gears side by side, suited to higher pressures.
- Internal gear pumps. A gear within a gear, suited to viscous liquids and low suction head.
- Magnetic drive gear pumps. Sealless designs for toxic or hazardous liquids. Ask us about availability for your duty.
How a Gear Pump Works
Liquid enters the suction side and fills the spaces between the gear teeth and the casing. As the gears turn, they carry that liquid around the casing to the discharge side, where the meshing teeth push it out. Because each turn displaces a fixed volume, flow stays almost constant as pressure changes, and it can be adjusted simply by changing the pump speed with a variable frequency drive.
Why Choose a Gear Pump
- Handles viscous liquids. Gear pumps are a first choice for oils, resins and polymers that struggle in centrifugal pumps.
- Constant, metered flow. Flow is proportional to speed, so dosing is repeatable.
- Self-priming. They can lift liquid from below the pump.
- Compact and simple. Few moving parts and easy maintenance.
- Smooth flow. Much lower pulsation than piston or diaphragm pumps.
Typical Applications
- Lube oil, fuel oil, diesel and hydraulic oil transfer
- Chemical additive injection and dosing
- Resins, polymers, adhesives, paints and inks
- Glycols, solvents and process chemicals
- Drum, tank and truck loading and unloading
- Skid-mounted metering and blending systems
How to Choose a Gear Pump
Start with the liquid: its viscosity, lubricity, temperature and whether it carries solids. Then define the flow, discharge pressure and suction conditions, and decide whether the duty is metering or transfer. Materials matter too, from cast iron and stainless steel to chemical-resistant options for corrosive liquids. For hazardous liquids, consider a sealless design. Read our guides to external vs internal gear pumps and how to select a gear pump.
Limits to Know About
- Gear pumps need a relief valve, because blocked discharge overpressures the pump.
- Abrasive liquids and solids wear the gears and clearances, so use another pump type for those.
- Most designs rely on the liquid for lubrication, so they must not run dry.
- Very low-viscosity, non-lubricating liquids can wear metal gears quickly.
Related Pumps and Services
See our positive displacement pumps, progressive cavity pumps, AODD pumps, canned motor and sealless pumps and chemical dosing pumps.
Frequently Asked Questions
What is a gear pump?
A gear pump is a positive displacement pump that moves liquid by trapping it between meshing gears and the pump casing. Each turn delivers a fixed volume, so flow is steady and proportional to speed, whatever the pressure. That makes gear pumps well suited to metering and to pumping viscous liquids.
What is the difference between an external and an internal gear pump?
An external gear pump uses two identical gears that mesh side by side. An internal gear pump uses a smaller gear rotating inside a larger one. External gear pumps generally handle higher pressures, while internal gear pumps are gentler on the liquid, handle a wider viscosity range and often need less suction head.
What is a metering gear pump?
A metering gear pump delivers a precise, repeatable volume per revolution, so flow can be set by controlling speed. They give smooth, low-pulsation flow and are used to dose additives, resins, oils and chemicals into a process.
What liquids can a gear pump handle?
Clean, lubricating liquids such as lube oil, fuel oil, diesel, hydraulic oil, glycols, resins, polymers, solvents, paints, inks, adhesives and many chemicals. Viscous liquids suit gear pumps especially well. Abrasive liquids and liquids with solids wear the gears and clearances, so they need another pump type.
Do gear pumps need a relief valve?
Yes. A gear pump delivers whatever volume it turns, so a blocked discharge can overpressure the pump and the pipe. A relief valve, built in or in the line, protects against that.
Do you supply magnetic drive gear pumps?
We supply gear metering and transfer pumps from Pompe Cucchi, and can advise on sealless magnetic drive options for hazardous or toxic liquids. Send us the liquid and conditions and we will confirm the right model.
Can a gear pump run dry?
Not for long. Most gear pumps rely on the pumped liquid for lubrication and cooling, so dry running damages the gears and seal. Sealless and standard designs both need protection against running dry.
What do you need to recommend a gear pump?
Send us the liquid and its viscosity, temperature, flow rate, discharge pressure, suction conditions, whether it is metering or transfer duty, and the materials required.
Get a Response Within 24 Hours
Send us the liquid, viscosity, flow, pressure and duty. Call or WhatsApp +966 56 278 9535 or email sales@powerenergy.com.co. Power Energy is based in Jubail Industrial City and supplies industrial customers across Saudi Arabia and the GCC.