Want Deep & Clean Vacuum - Choose Dry Screw Vacuum Pump

Screw pumps are well-known for their ability to generate vacuum in addition to other applications. They are designed to generate deep vacuum without oil contamination or abrasion. Advanced dry vacuum pumps technology meets additional requirements, such as high chemical resistance or high condensate compatibility to be used in laboratories.

Today's analysis and research laboratories have made vacuum technology an essential part of their work. Vacuum technology is an essential tool for many processes, such as drying, filtration and evaporation. The application will determine the specific requirements for vacuum equipment. What does this mean in concrete terms?

The constant trend toward high product purity, and clean processing control has resulted in an increase in laboratory applications. These technologies allow for contamination-free operation. They don't require any operating fluids (e.g. They do not require any operating fluids (e.g. for sealing) which could be harmful to the process. They also reduce maintenance-related oil changes, emissions, and waste oil disposal, which improves efficiency and sustainability.

High-Chemical Resistance is a requirement for processes that involve aggressive gases or vapors. Additional chemically resistant pump technologies will be required in these situations to ensure smooth, durable operation.

These two requirements are met by vacuum pumps: Oil-free operation and Chemical Resistance.

The Screw Vacuum Pump's Functionality

The dry running pumps include pumps for vacuum generation. They operate using the rotating displacement principle just like roots pumps. This principle was originally developed from an antiquity water lifting device with a rotating screw. The dry pumps used for vacuum generation today were used to transport water instead of gas. They have two rotating displacers, or rotors, inside. The screw pump is a two-shaft rotary displacement pump. These rotors are also known as spirals, spindles, or screws.

Vacuum Generation of Oil Free pumps relies on gas transport within gap-sealed chambers. The two spinning spindles are intermingled without contact and form multiple chambers with the stator. The gaps between them are very small, in the micrometer range. The spindles move in opposite directions but the chambers carry the gas. A mass flow is created by the suction and pressure sides. pumps need temperature control to ensure that the gap dimensions don't change due to heat generated during this process. The possible vacuum in an ideal operating temperature is determined largely by the fluid mechanical properties and the gap dimensions. The size and rotation speed of the spindles determine the pump's speed. This is the rule: A larger pump will require a higher pumping speed.

Dry Vacuum pumps have many advantages:

Vacuum generation is a common use of dry pumps in chemistry, pharmaceuticals and semiconductor manufacturing. This lack of oil is an advantage. pumps have many advantages. They are also versatile because of the high vacuum pressure and the wide range in pumping speeds. The vacuum pressure can vary between 10-3 mBar depending on the model. Pumps can be used in both rough vacuum (down below 1 mbar) or fine vacuum (down below 10-3 bar). They can also be used as back pumps for turbomolecular pumps or for other applications involving high and ultrahigh vacuum technology. Depending on the application, pumps can pump speeds of several hundred to several thousand meters per hour.Mechanical Vacuum Booster also have low maintenance requirements. They rotate without making contact with the ground, which prevents wear and abrasion. There are no seals within the working chamber that could fail. Pumps don't require any operating fluids like oil in their working chamber.

There are also other features such as the pitch for the spindles that allow the operation to be tailored to the task. This is called a constant-pitch pump if all chambers are equal in size. Variable pitch variants have smaller chambers, which can lead to compression. Variable pitch pumps have better thermodynamic properties. There is less heat and less noise generation. For processes that involve solvents, however, constant-pitch screws pumps have a greater condensate tolerance. A combination of these two has been developed as a patented screw profile that is used in Everest Dry Screw Vacuum pumps which is a combination of Constant as well as variable pitch which is know as a Hybrid Variable pitch. This screw profile pitch has the advantage of contastant pitch such as high liquid handling capacity as well as the advantage of a variable pitch of low noise and less heat generation.

Advanced Dry screw pump by EVEREST

The New Everest Screw pump has many benefits. It also features targeted design enhancements that are specifically designed for laboratory use. The dry screw pump is designed for applications and processes that require chemically resistant, condensate-compatible and absolutely oil-free pumps:

1..Vacuum drying2).Distillation3).Heat treatment4).Schlenk line5).Freeze dry6).Degassing7). Coating8)... and many other things

High chemical resistance The internals of the screw pump are made of special alloy steel that is coated with a special ENP coating, heat treated to ensure the new ESPH pump is extremely resistant to aggressive gases and vapors. They are resistant to almost all chemicals. These protect highly sensitive parts, such as the stator and spindles inside the pump that are directly in contact with the chemicals, they are coated with special high Ni, Cr, Mo coatings which provide excellent chemical and wear resistance.

High condensate compatibility Our Hybrid screw profile ensures best in class liquid handling capacity. 100% Oil-Free The patented triple sealing ensures that no process gasses can escape into the Oil Chambers or Oil get carried into the process chamber and thus it is 100% Oil-Free Operation (DRY)

Mechanical Booster pumps have an air-cooling system that eliminates the need to connect cooling water and provides more flexibility at the point where it is used.

In this article we speak about the Dry vacuum pumps, there advantages for use in Deep & Clean vacuum requirements and the various configurations of Dry vacuum pompous, the various screw profiles of Screw vacuum pumps and Roots Vacuum pumps

Dhruv Malhotra is the director and expert author of the Dry Vacuum Pump website, and the website having lot of information about all dry screw vacuum pumps, roots vacuum pumps, rotary vane vacuum pumps, oil syst vacuum systems.