OHHL low flow high head pumps

Finely tuned pumps for all your industrial needs

The OHHL is our API 610 (ISO 13709) Type OH2 low-flow horizontal overhung process pump. It covers the low-flow end of the OHH range map. The unique low-flow impeller design provides gap-free coverage for low-flow, high-head applications. The bearing frame and mechanical seals from OHH are utilized to minimize spares inventory.

ISO 13709 (API 610) OH2 - OHHL Single Stage Low Flow Overhung Pump
Main benefits
  • Stable head-capacity curves achieved with unique low-flow impeller-diffuser design
  • Low-flow, high-head gap-free coverage
  • Heavy-duty baseplates with 2x ISO 13709 (API 610) nozzle load option
  • ISO 21049 (API 682) cartridge type mechanical seals for reduced emissions
  • Interchangeable parts reduce spares inventory
Main applications
  • Seawater booster for critical services
  • Pump around services
  • High head makeup services
  • Light hydrocarbon boosting
  • Light Vacuum Gas Oil (LVGO) and Heavy Vacuum Gas Oil (HVGO) services
Main design features
  • Unique low-flow impeller-diffusers create stable H-Q curves
  • Robust OHH bearings, bearing housing and isolators
  • ISO 21049 (API 682) mechanical seals interchangeable with OHH pumps
  • Casings designed for 2x ISO 13709 (API 610) nozzle loads
  • Grouted, non-grouted or pre-grouted baseplates are available
Key characteristics
Capacities From 1 to 60 m3/h / 4 to 260 US gpm
Heads From 20 to 450m / 65 to 1 500 ft
Pressures Up to 51 bar / 740 psi
Temperatures From -75 to 425°C / -100 to 800°F
Discharge sizes From 25 to 50 mm / 1 to 2 inches
Maximum speed of rotation Up to 3,600 rpm
Performance range
OHHL Performance Range 50 Hz
Performance range 50 Hz
OHHL Performance Range 60 Hz
Performance range 60 Hz
Documents
Applications
  • Auxiliary applications
    The complex processes performed on a typical FPSO rely on the performance of dozens of pumps handling a variety of liquids under widely varying process conditions.

  • Crude oil pipeline mountainous terrain
    In remote areas, there may not be power available, or, terrain may be so steep that all the pressure rise has to be made in 1 station. Each pump must make the entire head. Pumps are often run in parallel. Hundreds of Sulzer multistage pump performances meet such high pressure requirements.

  • Crude oil pipeline offshore to onshore
    All the pressure rise must be made in the crude shipping pumps on the platform. Salt spray is corrosive and platform movement during storms can affect reliability. Specially packaged Sulzer multistage pumps are used to move crude oil from offshore platforms to onshore storage or pipeline systems.

  • Crude oil pipeline onshore flat terrain
    Power cost is the largest operating cost for crude oil pipelines on flat terrain. Flow rate, viscosity, pipe size, and station spacing all affect pump selection. 2 or 3 mainline pumps are often run in series. Sulzer can help with FEED assistance, rerates to optimize performance and lower power costs.

  • Liquefied petroleum gas pipelines
    Liquefied Petroleum Gas (LPG) mixtures (ethane, propane, butane) can have vapor pressure up to 40 Bar, specific gravity less than 0.40, and almost no lubricity. Sulzer provides special materials, acoustic studies, and lateral analysis to assure reliable performance with varying flow, speed, and fluid conditions.

  • Refined product pipelines
    Thousands of Sulzer multistage pipeline pumps move diesel fuel, jet fuel, gasoline, and other refined products all over the globe. Sulzer’s global service centers, service and retrofit not only our own pumps, but other pumps and motors as well.

  • Supercritical and compressible fluid pipelines
    For the past 30 years, Sulzer multistage pumps have been used to pump compressible, dense phase ethylene and CO2 at normal and supercritical pressures. Compressible performance prediction, acoustic studies, and, lateral analysis, are all part of service provided by Sulzer engineers for such rigorous applications.
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