3-screw pumps- Three screw pumps are the largest class of multiple screw pumps in service today. They are commonly used for machinery lubrication, hydraulic elevators, fuel oil transport and burner service, powering hydraulic machinery and in refinery processes for high temperature viscous products such as asphalt, vacuum tower bottoms and residual fuel oils. Three screw pumps also find extensive use in crude oil pipeline service as well as gathering, boosting and loading of barges and ships. They are common in engine rooms on most of the world's commercial marine vessels and many combat ships. Flow rates are available from 1 to 3300 GPM (4 to 13,250 L/M) or for operating pressures to 4500 PSIG (310 BAR). Subject to material selection limitations, three screw pumps are also used for polymer pumping in the manufacture of synthetic fibers such as nylon and lycra. Designs are now available in sealless configurations such as magnetic drives and canned arrangements. The magnetic drive screw pump is used extensively for pumping isocyanate, a plastic component which is an extremely difficult fluid to seal using conventional technology. Pumps are also now available in sealless canned configurations. Three screw pumps are renowned for their low noise levels, high reliability and long life.  Three screw pumps are capable of water injection services (Tritec) as well as high pressure coolant service for machine tools (Emtec) For more information, click here.

2-screw pumps- Generally, two screw or twin screw pumps are more costly to produce than three screw pumps and thus are not in as extensive use. They can, however, handle applications that are well beyond many other types of pumps including three screw designs. Twin screw pumps are especially suited to very low available inlet pressure applications especially if the required flow rates are high. Services similar to three screw pumps include crude oil pipelining, refining,  hot, viscous product processing, synthetic fiber processing, barge unloading, fuel oil burner and transfer as well as unique applications such as adhesive manufacture, nitrocellulose explosive processing, high water cut crude oil, multiphase (gas/oil mixtures) pumping, light oil flush of hot process pumping, cargo off-loading with ballast water as one of the fluids, tank stripping service where air content can be high and paper pulp production needing to pump over about 10% solids. Materials of construction range from cast irons and steel through stainless steels, hardened rotors and hard face inlays and coatings. Most twin screw pumps are made-to-order and can provide extensive customization where required by customer needs. For more information, click here.

Gear pumps- CIG (Crescent Internal Gear) pumps are produced primarily for fluid power applications and aircraft fuel test stands. They are available in multiple stages for very high pressure or moderate pressure on very low viscosity fuels. Pumps are also available in double pump configurations which share a common inlet port but deliver two independent flows for supporting multiple machine functions. The patented tooth profile of CIG pumps avoids trapping fluid. The result is a very low pulsation, extremely quiet high efficiency pump. Single pumps are available in 54 different models and double pumps in over 1300 different combinations. Single pump flow rates from 1 to 125 GPM ( 4 to 475 L/M) with continuous pressure ratings to 5000 PSIG (345 BAR).  For more information, click here.

Navy/Marine pumps- Imo supplies 3-screw pumps for engine room services such as fuel oil transfer, boost, stripping and burner. Fuels handled, range from heavy bunker fuels to light jet fuels. Imo pumps are also manufactured for lubrication service for diesel engines, gas and steam turbines, reduction gearing, generator sets, blowers and other similar equipment. Pumps can be supplied to commercial marine standards or to full military specifications including US Navy shock, vibration and noise requirements.

Imo Pump's Warren facility manufactures both commercial marine and full combat ship capable centrifugal pumps for services that include all seawater applications as well as fresh, chilled, condensate, feed and potable water for Navy and Commercial Marine vessels.  Warren also supplies centrifugal pumps for cargo oil as well as ballast applications.  Composite centrifugal pump parts manufactured from Simsite are also supplied to the US Navy.  For more information, click here.

Centrifugal Pumps Imo Pump supplies Allweiler brand centrifugal and propellor pumps manufactured in the Allweiler facility in Germany. Vertical lubricating oil tank-mount pumps, hot oil pumps and large flow propellor pumps are manufactured in accordance with Quality Assurance Management Systems approved to ISO 9000 standards. For brochure, click here.

3-Screw Pumps    Gear Pumps    Navy/Marine Pumps