Gear oil pump Rotan pump design concept and application scope

The DESMI ROTAN gear pump primarily consists of gears, a shaft, a pump body, a safety valve, and shaft end seals. 

The gears are heat-treated for high hardness and strength and are mounted together with the shaft in a replaceable 

sleeve. All pump components are automatically lubricated by the output medium during operation.

The gear pump features strategically designed drain and return oil grooves to minimize torque on the gears during 

operation, resulting in low bearing load, minimal wear, and high pump efficiency. The pump is equipped with a safety 

valve for overload protection. The full return pressure of the safety valve is 1.5 times the rated discharge pressure 

of the pump and can be adjusted within the allowable discharge pressure range based on actual needs. However,

 please note that this safety valve is not designed to function as a pressure reducing valve permanently; it can be 

installed separately in the pipeline if needed.

Gear Pump Applications

Mainly used for high-flow oil transportation and unloading in oil fields, oil depots, ports, docks, and ships!

Gear Pump Design Concept

The choice of materials for the manufacture and processing of gear pumps is crucial when selecting high-temperature 

industrial pumps. Gear pumps are often used to pump highly corrosive, abrasive, or volatile fluids. The pump casing, 

shaft, and bearing materials must first be compatible with the pumped fluid. When high temperatures are considered, 

gear pump design becomes even more complex, even requiring consideration of the thermal expansion of various 

materials. Gear pumps require careful consideration of various quality factors during operation, ensuring their value 

and performance, and their continued importance in the industry.

Preheating the gear pump is essential to prevent damage to components from high-temperature shock. Preheating 

is recommended when the pumped fluid temperature exceeds 150°C. When using a mechanical seal, the gear pump 

must be preheated to within 30°C of the operating temperature to prevent damage to the sealing surfaces. Jacketed 

pumps can be preheated using steam, heat transfer, or electrical heating. Viscosity is the resistance to fluid flow. The 

first challenge with high-viscosity applications is getting the fluid into the pump. The gear pump must rotate very 

slowly to allow the fluid to enter the cavities between the unmeshed teeth. These cavities create suction, drawing the 

fluid into the pump. The tighter the clearances, the better the gear pump's internal seal and the greater the suction.

To learn more, please click：https://www.dfinsewagepump.com/DESMI-ROTAN-Gear-Pumps.html