API-610 OH2 and ISO 13709 compliant for General Refinery Services centrifugal, single stage, full centerline mounted with high shaft rigidity for processes engineers requiring efficient high pressure and high temperature services

The Marelli SMK pump seres has a range of customized features to specific application requirements that process engineers require for upstream oil and gas, midstream, downstream refining, petrochemical and chemical processing.

  • Flows to 7,000 gpm (1,600 m³/hr)
  • Heads to 1,200 ft (256 m)
  • Suction Pressure 551 psi (38 bar)
  • Temperature Range -238 to 842°F (-150 to 450°C)

Precision engineered API/ISO 13709 process pumps meeting rigorous engineering requirements for heavy duty, high temperature applications while receding the total life cycle cost and improving mean time between repairs.



  • Hydrocracking
  • Topping
  • Gas condensate
  • HDS
  • Merox LPG
  • Amine
  • Sour water
  • Coking
  • Platforming


Crude oil and gas pipelines

Offshore and onshore oil and gas

Reverse osmosis


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  • Flows to 7,000 gpm (1,280 m³/hr)
  • Heads to 1,200 ft (265 m)
  • Maximum Power 938 HP (700 kW)
  • Maximum Suction Pressure 551 psi (38 bar)
  • Temperature Range -238 to 842°F (-150 to 450°C)

Proven to be reliable, efficient and long-lasting, Marelli OH2 pumps provide a number of operational benefits for process engineers and plant operators:

  • API 610 11th Edition/ISO 13709 full compliance for reliability and accountability
  • Suitable with 60 Hz and 50 kW motors
  • Higher efficiencies due to a design with tangential discharge and a wide variety of hydraulics to match exact duty points
  • Centerline mounted pump casing maintains alignment during operation and elevated temperatures
  • Low suction specific speed and low NPSH characteristics with a wide choice of impellers for optimum efficiency over a large operating range
  • Finned bearing housing to provide maximum heat dissipation under API 610 compliance
  • Isolation chamber at bearing housing with a thermal barrier among mechanical seal chamber and bearing housing
  • Deflection system with fins to improve cooling
  • Labyrinth bearing seals to avoid external contamination and maximize seal and lubrication life
  • Highly maintainable and replaceable wear rings to reduce overall life cycle costs
  • Socket welded flanged drains and vents as standard (gussets and bracing also available)
  • Choice of multiple impellers in each hydraulic pump casing for optimum efficiency over a wide operating range
  • A variety of instrumentation options are available for monitoring all key operating perimeters (temperature, pressure, vibrations and more)