Marelli OH2 end-suction, full centerline mounted, radial split, overhung horizontal single and double volute centrifugal pump

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.

APPLICATIONS

Refineries

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

Petrochemical

Crude oil and gas pipelines

Offshore and onshore oil and gas

Reverse osmosis

Synfuels

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Benefits

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)

Specifications

Heads to 1,200 ft
Flows to 7,000 gpm
Standards API 610 OH2
Maximum Motor Power 938 HP
Temperature Range -238 to 842°F
Maximum Case Working Pressure 725 psi
Maximum Suction Pressure 551 psi
Differential Head 1,200 ft
Maximum Viscosity Consult Factory
Mounting Configuration Horizontal-end top
Seal Configurations API 682
Available Flanges 300#, 600# ANSI FF/RF
Suction and Discharge Sizes Up to 12″
API Plans All API 682 Configurations

Heads to 256 m
Flows to 1,280 m³/hr
Standards ISO 13709
Maximum Motor Power 700 kW
Temperature Range -150 to 450°C
Maximum Case Working Pressure 50 bar
Maximum Suction Pressure 38 bar
Differential Head 360 m
Maximum Viscosity Consult factory
Mounting Configuration Horizontal-end top
Seal Configurations API 682
Available Flanges 300#, 600# ANSI FF/RF
Suction and Discharge Sizes up to 30.48 cm
API Plans All API 682 Configurations

Materials

Part	S1	S5	S6	S8	C6	A8	D1
Pressure Casing	Carbon Steel (A216 WCB)				12% CHR	316 AUS	Duplex
Impeller	Cast Iron	Carbon Steel	12% CHR	316 AUS	12% CHR	316 AUS	Duplex
Wear Rings	Cast Iron	12% CHR Hardened		Hard-faced 316 AUS	12% CHR Hardened	Hard-faced 316 AUS	Hard-faced Duplex
Shaft	Carbon Steel	AISI 4140		316 AUS	12% CHR	316 AUS	Duplex
Bearing Housing	Carbon Steel (A216 WCB)
Base Gasket	AUS, Spiral Wound			316 AUS Spiral Wound	AUS, Spiral Wound	316 AUS, Spiral Wound	Duplex SS Spiral Wound