OH3/4 Vertical Inline Types VBU/VBU2

Model: VBU/VBU2 (OH3)

Type: Vertical Inline, Radially Split
Max. Capacity: M3/Hr 65
  USGPM 300
Max. Head: M 290
  Ft. 950
Max. Temp: °C 425
  °F 800
Std. Pressure: Barg 50
  PSIG 750
Opt. Pressure: Barg 100
  PSIG 1,500
Discharge Sizes: MM 40 to 250
  Inches 1.5 to 10
Max. Speed: RPM 3,600


United VBU single and two stage inline pumps are specially designed for low flow/high head applications outside of the performance range of standard API 610 pumps. The VBU was originally designed as a direct replacement for problematical OH6, integrally geared, high speed pumps that often experience recurring gearbox and bearing problems. Well suited for a wide variety of process fluids and in confined spaces such as offshore platforms. Fully compliant with API 610, 11th Edition.

Standard Features:

  • Bespoke designs tailored to project requirements.
  • 300# flange ratings, side suction, side discharge in­line design.
  • Available in all API 610, Table H­-1 materials.
  • Fully machined impellers, for accurate flow control.
  • Close clearance metalized carbon throat bushing for optimal control of stuffing box environment.
  • Cylindrical roller radial bearings for ample load carrying capability.
  • Duplex angular contact 7300 series thrust bearings.
  • Grease or pure mist lubrication.
  • Labyrinth bearing housing isolators.
  • Heavy duty baseplate, drip rim or drip pan designs.

Optional Features:

  • High pressure special casing design.
  • Pure­Mist lubrication of bearings.
  • Oversized shafts and bearing housing arrangements.
  • Fan/Heat­sink bearing housing cooling arrangement for operation at elevated temperatures, to eliminate the need for cooling water.
  • Magnetic bearing housing isolators.
  • Mounting plate/sole plate.
  • Non­-standard API 610 material available.