CEM – Gear pumps


Construction features:

Shaft: Steel
Mechanical seal: VITON (special corrosion-proof)

Bronze (B)
Pump body: Bronze, Gearings: Bronze

Cast Iron (G)
Pump body: Cast Iron G25, Gearings: Cast Iron G25



Self-priming volumetric gear electric pumps suitable for transferring of viscous liquids without any solid bodies in suspension such as lubricant oil, fuel oil and diesel oil
The GEAR ST series is fixed on a base and coupled to the engine by a flexible joint.

A gear pump uses the meshing of gears to pump fluid by displacement. They are one of the most common types of pumps for hydraulic fluid power applications. The gear pump was invented around 1600 by the German astronomer, mathematician, and astrologer Johannes Kepler

Gear pumps are also widely used in chemical installations to pump high viscosity fluids. There are two main variations; external gear pumps which use two external spur gears, and internal gear pumps which use external and internal spur gears (internal spur gear teeth face inwards, see below). Gear pumps are positive displacement (or fixed displacement), meaning they pump a constant amount of fluid for each revolution. Some gear pumps are designed to function as either a motor or a pump.

Direct current: 

  • Permanent Magnet motor 12/24V DC
  • Protection IP44
  • Insulation Class F
  • Continuous Duty (S1)

Alternating current:

  • Induction electric motor
    • 110V single-phase (MS) – 60Hz (available on request)
    • 230V single-phase (M) – 50Hz (60hz available on request)
    • 230~400VAC Three-phase – 50Hz (60hz available on request)
  • Protection IP55
  • Insulation Class F
  • Continuous Duty (S1)

Scope of operation: Liquid free of solid impurities
Temperature range of the liquid: from + 0 to + 120 °C
Viscosity of the liquid: 10°E max


  • By pass safety valve to install in the outlet to protect the pump from dangerous over pressures. The valve can be calibrated by acting on the adjusting screw
  • 6 poles motor suitable for liquids with viscosity from 10°E to 50°E
  • Mechanical seal for high temperature (max. 200 °C) made of WIDIA – VITON

Additional information


Bronze, Cast Iron


12V DC, 24V DC, 230V, 230~400V

Flow @ 5bar

5.3L/min, 10L/min, 15L/min, 25L/min, 35L/min, 50L/min, 60L/min, 70L/min, 115L/min, 164L/min, 212L/min, 258L/min, 314L/min, 365L/min, 415L/min, 515L/min, 620L/min

Flow @ 10bar

5L/min, 9.6L/min, 14.2L/min, 23.3L/min, 33.3L/min, 48.3L/min, 56.5L/min, 105L/min, 156L/min, 205L/min, 250L/min, 302L/min, 350L/min, 405L/min, 505L/min, 600L/min