Yildiz YHL External Helical Gear Pump

Resin Pump & Thermal Oil Pump

Key Specifications
Max Flow Rate 5833lpm
Max Head 150M
Max Temperature 350°C
Max Viscosity 55,000 cP
Solids 0mm
Sizes 2" to 10"
Datasheet
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This Helical Gear Pump range is designed for pumping low to high viscosity fluids with lubricating properties at high temperatures. There is also the option for these external gear pumps to be supplied with an external heating jacket to maintain the temperature of the pumped medium. Due to the tight clearance between the gears, these helical external gear pumps are not designed for fluids containing abrasive particles. The most common applications include fuel oil transfer, diesel fuel transfer, coolant transfer, OEM, hot oil circulation, food industry, marine, and lubrication.

Read our gear pump guide for detailed information on how they operate and the applications they are commonly used for.

  • Helical external gear pump
  • Designed for medium pressure, high temperature applications
  • Compact design
  • Various material options
  • Various sealing options
  • Pressure relief valve on cover
  • External jacket cover to maintain liquid temperature available
  • 230v, three phase 50/60hz motors available
  • Motor and gearbox drive available
  • Manufactured according to CE regulations
  • Explosion proof ATEX rated motors and non-sparking flexible couplings are available

Key Benefits:

      

CAST
IRON		STEEL
CAST		STAINLESS AISI
304/316 CAST		SNBZ 12
BRONZE		BEARINGCARBON
GRAPHITE		INA BUSHING
BEARING		SOFT
SEAL		MECHANICAL
SEAL
PUMP BODY & COVERSXXX
GEARS X X X
BEARINGS XXXX
SEALINGXX

FAQs

Gear pumps operate by an unchanging volume of fluid passing between the teeth of two meshing gears and their casing at a constant rate (not between the gears themselves). As the gears rotate and the meshed teeth separate, a partial vacuum is formed that fills with fluid, which they trap and move it around the casing from the suction to the discharge point.

The pumping of high viscosity lubricating fluids such as oils, fuels, paints, soaps and resins. The pumping of low viscosity fluids should be avoided as they can cause fluid to leak backwards or "slip" back to the suction side.

An external gear pump has two identical gears positioned side by side, rotating and interlocking into one another. One is driven by the motor and in turn moves the other gear.

Whilst external gear pumps offer higher pressure and flow rates, internal gear pumps generally have better suction capabilities and are able to handle higher temperature, higher viscosity fluids. Internal gear pumps slower speeds and larger clearances also makes them more suitable for shear sensitive fluids

Yes. Gear pumps have excellent self-priming capabilities thanks to their rotating gears evacuating any air in the suction line, and forcing the liquid into the pump inlet.

The close tolerances between the gears and casing mean that pumping solids will result in wear and damage. Some internal gear pump designs which have less tight tolerances and slower speeds however may be able to tolerate small solids.

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