Seim Screw Pump

Seim Screw Pump

The axial balance at low pressure is achieved by using double bushes; the power rotor and idler rotor are tensioned when running to prevent deformation of screws; meanwhile, the friction of idler rotors are reduced for better rotation conditions; High grade of product, with exquisite appearance...
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Product Details

The axial balance at low pressure is achieved by using double bushes; the power rotor and idler rotor are tensioned when running to prevent deformation of screws; meanwhile, the friction of idler rotors are reduced for better rotation conditions; 


High grade of product, with exquisite appearance and delicate components:

① The most components are made of aluminum alloy by accurate die casting;

②The product is of anti-corrosion, free of paint, esthetic;

③ Innovative design in structure, simplifying the complete design under the conditions of performance requirements are met, resulting into a simple and compact product;

④ Small size and light weight: its size is 1/2 of that of conventional products, weight is 1/3 of that of conventional products;


Performance  Viscosity:3.0 ~ 1500 mm2/s

Flow:10 ~ 1200 L/min

Maximum Pressure:1.6 Mpa

Maximum Temperature:120 ℃


Tri-screw pump is a rotor-type volumetric pump. It uses the principle of screw engagement and depends on the rotating screw to engage each other in the pump sleeve.


The utility model is mainly composed of a bushing (pump cylinder) fixed in the pump body, an active screw inserted in the pump cylinder and two driven screw engaging with it. Three intermeshing screw rods form a sealing chamber according to each lead in the pump cylinder, which results in sealing between suction and discharge ports.


The three-screw pump closes the conveyed medium in the meshing chamber and pushes it to the outlet continuously and uniformly along the screw axis to provide stable pressure for the system. When working, the two ends act on the suction and drainage pressure of the liquid separately, which produces the axial thrust on the screw. In addition, the high-pressure oil is introduced into the bottom of each screw sleeve through the central oil hole of the active screw, thus generating a balanced thrust opposite to the axial thrust direction at the lower end of the screw. Therefore, thrust bearings can be used for small pumps with pressure difference less than 10 kg/cm2.

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