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Internal Eccentric Gear Pump

Internal Eccentric Gear Pump
Internal Eccentric Gear Pump

Internal Eccentric Gear Pump

ATEX icon ISO icon CE icon EN10204 icon

The Internal Eccentric Gear Pump is a reliable and efficient solution based on the simple “gear within gear” principle. The rotary and idler gears in the pump head create cavities between their teeth, achieving positive displacement. During each revolution, a fixed volume of fluid enters the casing through the suction port, filling the spaces between the gear teeth. The crescent within the pump head then separates the fluid as the idler gear turns on the pump shaft. The Internal Eccentric Gear Pump delivers smooth and accurate pumping which makes it an excellent choice for various applications.

  • Only 2 moving components within the process medium
  • Capable of pumping fluids too viscous for a Centrifugal Pump
  • Efficient suction lift applications
  • Bi-directional pumping action
  • ATEX-rating available for use in hazardous environments

 

Max. Flow:

Max. Head:

Max. Temp:

Material:

250m³/hr

150m

200°C

Metal

ATEX icon ISO icon CE icon EN10204 icon

The simple “gear within gear” principle of Internal Eccentric Gear Pumps means that there are only two moving components within the process medium. The positive displacement is achieved by the filling of the cavities between the teeth of both the rotary and idler gears located in the pump head. With each revolution, a fixed volume of fluid enters the casing through the suction port, filling the space between the teeth of the gears. The crescent within the pump head then separates the fluid as the idler gear turns on the pump shaft.

Image 1: Fluid entering the pumpOperating Principle of Yildiz Eccentric Gear Pump

The orange-coloured section in the image represents the process medium as it is entering the pump suction port and the pump casing & filling the cavities between the Idler Gear (Red) & Rotary Gear (Brown). The three arrows indicate the direction of fluid passage through the pump and the rotational direction of the gears.

Image 2: Fluid filling the cavities & split of flow

As the fluid progresses through the pump head and fills the cavities between the gears, it is also separated by the crescent shape in the pump head, which acts as a seal preventing backflow between the suction & discharge ports.

Image 3: Pump almost flooded

As the fluid fully fills the casing, all cavities between the gears are completely filled in the form of locked pockets of fluid to guarantee absolute volume control and enable the pump to deliver a fixed volume per revolution.

Image 4: The pump is flooded & starts to discharge the process medium under pressure

Once the pump is fully flooded, the rotor and idler gears mesh together and form a liquid seal which is equidistant between the pump ports, which then enables the fluid to exit the discharge of the pump under pressure. The delivery pressure is dependent on the installed power of the motor.

Our Internal Eccentric Gear Pump is ideal for the following industries & applications:

  • Fuel Oil, Gas Oil, Diesel-Fuel
  • Hot Oil circulations (on a small scale)
  • Pharmaceutical Industry
  • Detergent
  • Dye
  • Asphalt
  • Food Industry

Max flow: 200m³/hr

Max pressure: 15 Bar

Viscosity range: 10 – 55,000 cSt

Max speed: 1400rpm

Max temp: 200ºC

Materials and Limits

Connection Sizes 3/8″ – 8″
Capacity Range 0.1 – 250m³/hr
Pressure Range 1 – 15 Bar
Temperature Range up to 200ºC
Speed Range 20 – 1720 rpm
Viscosity Range 20 – 55,000 cPs
Pump Body & Cover Cast Iron, Spheroidal Cast Iron, Cast Steel, Stainless Steel AISI 304/316
Gears Spheroidal Cast Iron, Cast Steel, Stainless Steel AISI 304/316, CrNi Stainless Steel
Bearings SnBz12 Bronze, Carbon Graphite, Silicon Carbide, Hard Metal Coated Steel
Sealing Soft Seal / Packed Gland, Rotatherm Seal, Lip Seal, Mechanical Seal, Cartridge Type Mechanical Seal

Largest UK Stock

Same Day Quote

Fastest Delivery

Largest UK Stock

Same Day Quote

Fastest Delivery

Looking for more information about the services offered by Tapflo UK?

Our friendly team at Tapflo UK would be more than happy to assist you further with any pump solutions, delivery information or questions you have. If you need additional support on-site, you can speak to a member of the team today to organise a site visit.

Give us a call now:

02380 252 325

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