What is the working principle of screw pumps?

SEIM screw pumps generally consist of 3 screws, with some models featuring 2 screws. A drive screw is located in the center, connected to the pump shaft, and two idle screws extend parallel on either side. As the drive screw rotates, the idle screws are supported and all three screws begin to turn simultaneously. The arrangement of the screws allows the clearance between the drive screw and the idle screws to facilitate fluid transfer.

What are the purposes of using SEIM screw pumps?

SEIM screw pumps can be used for transferring both thin (low-viscosity) and thick (high-viscosity) oils, as well as fuels like fuel oils. The SEIM product range includes screw pumps designed for high-pressure, low-flow, or low-pressure, high-flow applications, as well as models that combine both high pressure and high flow. Upon request, pumps can be manufactured in compliance with ATEX standards. Additionally, SEIM produces pumps that meet API standards and are certified accordingly.

What are the material properties of SEIM screw pumps?

SEIM screw pumps can be manufactured in various material options to suit different processes. For the pump body, materials such as cast iron, aluminum, and stainless steel are available. The materials for the pump screws also vary depending on the process requirements and include options such as nitrided steel, carbon steel, and cast iron.

What are the processes in which SEIM screw pumps are used?

SEIM screw pumps are used in various processes due to their models with different flow and pressure characteristics. Some of these applications include: oil circulation pumps for lubrication systems, bearing pumps for supporting lubrication and cooling, pulverization pumps employed in spraying applications, and transfer pumps for fluid transfer in industrial systems. SEIM seal-less screw pumps are also used in elevators. They are utilized for fuel transfer on ships and in cement plants and factories with mills, during lifting operations and/or for bearing support.

What are the capacity and other operating values of SEIM screw pumps?

SEIM screw pumps feature different models with varying pressure and capacity values. The maximum flow rate among SEIM screw pumps is 5400 liters per minute, and the maximum pressure is 120 bar. These are standard values, but pumps exceeding these specifications can be manufactured by SEIM for special processes.

What are the accessories of SEIM screw pumps?

SEIM screw pumps come with various optional accessories. One of these is the internal relief valve, which can be added to almost all SEIM screw pump models upon request. Additionally, SEIM manufactures an “Oil Cooler” unit that incorporates its own screw pump.

What are the advantages of SEIM screw pumps?

SEIM screw pumps can be used in a wide range of processes due to their models with varying pressure and flow rates. They are advantageous because they can easily achieve pressures and flow rates that other pumps cannot. Another advantage is the low number of components that make up the pump.