OHH OVERHUNG SINGLE STAGE PUMPS

Unique designs for all applications

The OHH is our API 610 (ISO 13709) Type OH2 overhung, horizontal, centerline mounted, single stage, radially split process pump. It has the broadest performance range in the industry and is used in heavy-duty refinery, petrochemical, gas processing and offshore oil production services.

Main benefits

Finned bearing housing and fan cooling for long bearing life
Broadest range map in the industry for ISO 13709 (API 610) type OH2 pumps
Heavy Duty baseplates with 2x ISO 13709 (API 610) nozzle load option
ISO 21049 (API 682) cartridge type mechanical seals for reduced emissions
Electric motor or steam turbine drivers

Main applications

Seawater booster for critical services
High-temperature vacuum bottoms
Low pressure unit charge
Light Vacuum Gas Oil (LVGO) and Heavy Vacuum Gas Oil (HVGO)
Fractionation bottoms

Main design features

Robust shaft for minimal deflection
Casings designed for 2x ISO 13709 (API 610) nozzle loads
Oil ring, purge mist or pure oil mist lubrication available
300 # flange rating standard. 600# optional
11,000 Net Suction Specific Speed (NSS) standard
Optional improved suction performance on most sizes

Key Characteristics

Capacities	Up to 2,250 m3/h / 10,000 US gpm
Heads	Up to 360m / 1,200 ft
Pressures	Up to 75 bar / 1,100 psi
Temperatures	From -75 to 425°C / -100 to 800°F
Discharge sizes	From 25 to 400 mm / 1 to 16 inches
Maximum speed of rotation	Up to 3,600 rpm