Lobe (Trochoidal) Pumps – RT Series

Working Principle

An internal lobe pump unit consists of an inner and outer rotor. The inner rotor has one teeth lesser than the outer rotor. RT series uses a trochoidal inner rotor and an outer rotor formed by a circle with intersecting circular arcs. The inner rotor is located off-center and both rotors rotate. During part of the assembly’s rotation cycle, the area between the inner and outer rotor increases thus creates a vacuum. This vacuum creates suction, and hence, this part of the cycle is where the intake is located. Then, the area between the rotors decreases, causing compression. During this compression period, fluids can be pumped, or compressed (if they are gaseous fluids).Smooth rolling action of the rotors results in minimum noise, vibration and pulsation – less flow.


  • High speed operation and vibration free running
  • Smooth, pulsation free flow
  • Negligible maintenance
  • High suction lifts and low noise level
  • High volumetric efficiency and overall efficiency
  • Compact and light weight design
  • Ease of dismantling and assembly


  • Transfer of lubricating oils
  • Pressure lubrication and cooling of bearings
  • Oil circulation through cooler, gear lubrications, etc.
  • Transfer of fuel oils
  • Boosting of fuel oil pressure for oil burner service and fuel injection pumps


Rotors :

Sintered Iron, Cast Iron

Casing :

Cast Iron

Shaft :


Seal :

Oil Seal (Nitrile) / Gland / Mechanical Seal

Capacity Outlet :

03-200 lpm

Pressure :

Up to 8 Bar

Viscosity :


Temperature :

Up to 80°C

Speed :

Upto 1450 rpm

Drive :

Direct Only

Rotation :

Anti-clockwise facing pump drive shaft