Rotary lobe pumps KV

  • Series description
  • Technical characteristics
  • Downloads
  • Related content
  • Rotary lobe
  • Chemical processing
  • Downstream and petrochemistry
  • Chemically active
  • Highly viscous
  • rock-oil
  • masut
  • oil
  • diesel fuel
  • water + petroleum products


Rotary lobe pump of KV 0,7/18 type and electric pump unit on its base is designed to supply spinning solution and other high-viscosity liquids.

The unit is related to repairable items of aspect I GOST27.003-90 and is manufactured in climatic version U location category 4 GOST 15150-69.

Conventional alphanumerical designation of the unit in orders, correspondence and other documentation should correspond to the indexing adopted in the pump-building industry and to include Technical Specifications designation.


As to the principle of operation the rotary lobe pump is positive displacement machine. In the course of driving and driven rotors rotation, a vacuum is created at the inlet side; as a result the liquid is moved from the inlet to the outlet. At the outlet while the lobes are in engagement the liquid is expelled into the system.

The pump consists of the following main parts and subassemblies: driving and driven shafts equipped with rotors, rolling bearings and gear, the casing, bracket and seals.

The rotor and the gear are fixed at the opposite sides of the shaft.

The driving and the driven rotors are the shafts with lobes which are secured by keys and screws. The rotores are positioned in the special bores of the casing.

The shafts are supported in bearings within the bracket.

The sealing of the shafts – stuffing box.

The unit is completed by the motor-variator-reductor.


  • for pumping of high-viscosity chemically active liquids at the enterprises of the chemical and petrochemical industries

Features /Advantages

  • pump parts are made of stainless steel
  • gear reducer for operation with high viscosity liquids

Technical parameters

Pump models Flow (rang), m³/h Back pressure, m Pump unit power, kW Rotation speed (rang), rpm Rotation speed (rang), c˜¹ Pump outlet pressure, kgf/sm², max Pump efficiency,% Voltage, V Frequency, Hz Type of current
KV 0,7/18 0.6...2.5 80 6 30...112 0.5...1.8 18 30 380 50 AC

Pump type key

For example КV 0,7/18-2,5/18Е-Rp U4 TU26-06-1662-93 , where:

  • К – rotary lobe pump
  • V – high pressure
  • 0,7 – working volume, l
  • 18 – pressure of the pump, kgf/сm²
  • 2,5 – maximum capacity of the pump when coupled with motor, m³/h
  • 18 – outlet pressure, kgf/сm²
  • Е – flow passage material designation (stainless molybdenum steel)
  • Rp – variable drive
  • U4 – climatic version and location category as per GOST 15150-69