KRHA (OH2) - single-stage, radially split, heavy-duty process pump with high flow rates

  • A blue painted pump unit of an Apollo KRHA, single-stage, radially split API 610 (OH2) pump with supply system, electric motor and other accessories.

    KRHA01

  • View of two completed Apollo KRHA pump units with TS systems, motor, and piping, which are responsible for transporting vacuum gas oil.

    KRHA02

  • Close-up of a KRHA pump skid from Apollo, showing the spiral housing in cast steel and the supply system and motor in the background.

    KRHA03

The horizontal, single-stage, radial-split, heavy-duty process pump meets all requirements of API 610 and ISO 5199. The robust design of the pumps, as well as the reliable hydraulic version, enable to fulfillment of all requirements of the application in many fields.

Operation limits KRHA

Q (m³/h) 5 000
H (m) 220
P (bar) 55
T (° C) + 450

Application Industries

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Volute casing pumps of type KRHA are applied in processing plants where complicated processing problems of liquid pumping have to be solved. Clean and slightly contaminated, cold and hot, chemically neutral or aggressive liquids can be pumped with these pumps. 

  • Petrochemical Plants, Refineries
  • Chemical Industry/Process Engineering
  • Sugar Industry
  • Power Plants 
  • Desalination Plants for Sea Water
  • Environmental and Offshore Engineering
  • Treatment Plants for Mineral Oil Systems, etc.
KRHA: OH2 pump with characteristic curve field for pressure and performance characteristics.
KRHA quarter cut
  • Concept: big impeller diameters and speeds up to 1800 r.p.m. for high delivery head and lowest NPSH values
  • axial suction nozzle, radial discharge nozzle
  • centerline-supported
  • casing > NW 80 of double-volute design
  • reduction of axial forces
  • low vibration – long service life
  • back-pull-out version in connection with demountable coupling allows simple maintenance, volute casing and motor remain in initial position
  • seal area acc. to API 610/682, suitable for a variety of seals
  • standard version
  • flanges according to ASME B16.5 for class 300 or 600 lbs
  • exchangeable wear and guide rings enable easy maintenance and cost reduction
  • dynamically ballanced impellers guarantee very smooth running
  • solid shaft design meets all requirements of API-610
  • grey cast iron
  • ductile cast iron, ADI materials
  • cast steel
  • 12 % chromium steel
  • austenitic steel
  • special alloys
KRH_ausfuehrung-fuer-hohe-saugdruecke_engl.jpg
  • tandem bearing with cooled down oil sump
  • on very high pressure or bearing load a tandem bearing with oil pressure lubrication and external oil filtering and oil cooling
  • reinforced casing designs
  • special design of rotor package
KRH_ausfuehrung-fuer-hohe-temp_engl_01.jpg
  • temperature up to 450 °C
  • high process safety also on very high temperatures
  • special sealing concept for high temperatures
  • mechanical seal + barrier fluid system according to API-682 for high temperature
  • heat barrier prevents penetration of heat into bearing
  • fan cooling and cooled down oil sump ensure low bearing temperature
  • cooling of seal chamber

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