Internal Lobe Pumps

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. Tushaco’s RT and RTBP 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. View Catalogue


Typical Pumped Media

Fuel Oil, Lube Oil, Oily water.

Typical Applications

Transfer and barrel unloading, Pressure lubricating & cooling of bearings & gear boxes.

Typical Industries

Power generation, Marine, Navy, Oil & Gas, General Industrial, Machine Tool, Cement, Steel.

Maximum performance data

  • Capacity : upto 200 lpm
  • Diff. Pressure : upto 8 bar

Maximum Operating parameters

  • Viscosity : upto 1,500 cSt
  • Fluid Temperature : upto 250°C

Material of Construction

  • Casing options : Cast Iron
  • Gear : Sintered Iron
  • Sealing Options : Gland packing / Mechanical seal / Oil seal

Construction Features

  • Mounting options : Horizontal Foot / Horizontal Flange
  • Relief valve options : Built-in / Line mounted

Salient Features

  • Capable of running at direct motor speed
  • Less noise and vibration
  • Very compact installation
  • High suction lift
  • Negligible maintenance