Three Screw Pump

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
They are also used 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 as well as high pressure coolant service for machine tools.

1\Main feature
A SN Three Screw pump has constant capability and pressure, smooth running, small vibration and low noise.
B SN Three Screw pump has very high suction capability; It doesn't need bottom valve or oil injection before working.
C SN Three Screw pump is high efficiency and has long service life.
D The parts are generalized and systemized. Every pump can be supplied as foot-type, bracket-type or flange-type, so they can be installed as horizontal, vertical or flanged.
2\Usage
SN Three-Screw pump is used for transferring non-corrosive and no solid-contained oil or lubricated medium.
Such as various mineral oil, animal and vegetable oil, fuel oil and various heavy oil, diesel oil etc.
3\Application
A In heating equipments as fuel oil injection, fuel supply and transfer pumps.
B In the machinery industry as hydraulic pumps and lubrication oil pumps.
C In the chemical and food industry as cargo pumps transfer or supply pumps.
D In the marine field as transfer pumps, booster pumps, fuel oil pumps as well for ship hydraulic