Industrial vacuum pumps are devices that create a vacuum within a sealed area. Vacuum pumps are widely used for many industrial applications and processes. They are used in the production of electric lamps and vacuum tubes, which are used in microwaves and other appliances. In the automobile industry, vacuum pumps can be integrated into vehicle engines and used to change pressure levels in hydraulic brakes and camshafts.
Industrial vacuum pumps are very important in research and engineering and are used in semiconductor processing, electron microscopy and to create contaminant-free environments for analytical instrumentation. Industrial vacuum pumps are also used in the fabrication of consumer products. Shaving razors, eyeglasses and dirt bikes can undergo vacuum-coating processes to enhance durability or for decorative purposes. Medical vacuum pumps are used to create suction during surgical procedures. Vacuum pump systems are often made of heavy-duty stainless steel and other materials that can withstand the conditions inside a vacuum chamber. Atmospheric pressure affects the state of every material; oils, greases and plastic or rubber accessories must be able to maintain their shapes and properties in a stressful range of atmospheric pressure conditions.
There are three main categories of vacuum pumps: positive displacement, momentum and entrapment pumps. Positive displacement pumps work by expanding an enclosure, which reduces the air pressure inside. The enclosure is then sealed and its contents are expelled, creating a vacuum. Momentum transfer pumps bring gas molecules and solid surfaces into contact, causing repeated collisions that direct the molecules out of the chamber; high vacuums are achieved using diffusion and turbomolecular pumps that employ this technique. Entrapment pumps use condensation created by rapid heating and cooling to compress and trap gas molecules in a solid or absorbed state. Industrial vacuum pumps are also sometimes categorized according to whether they use oil lubrication or not. Oil lubricated vacuum pumps have a higher vacuum-generation capacity than dry vacuum pumps because the presence of oil enhances the seal between moving parts. Dry vacuum pumps are used in applications in which the machinery comes into contact with food, pharmaceutical products, medical instruments or people. Dry pumps are more common than wet pumps and are generally less expensive, though wet vacuum pumps can generate lower-pressure vacuums than can dry pumps.
Industrial Vacuum Pump - Vacuubrand, Inc.
Industrial Vacuum Pump - Vacuubrand, Inc.
As stricter environmental regulations are being applied, conventional oil-sealed vacuum pumps are making way for environment-friendly diaphragm vacuum pumps, also known as dry vacuum pumps and oil less vacuum pumps. They no longer are a part of laboratories only. Their application has expanded from small to medium size industries, as they allow users to eliminate oil from many processes, and cut oil usage in many others, thus reducing maintenance significantly.
There is a common notion that they cannot withstand the challenging environment like industrial vacuum pumps; however, advent of newer durable construction material is diluting the notion.
Benefits of Improved Versions
Two different types of designs are available:
For non-evaporative applications, pump with standard aluminum construction are suitable. They are extensively being applied for vacuum impregnation, vacuum filtration, as a backing unit for turbo-molecular pumps, and degassing.
Procedures that are deemed unsuitable for standard aluminum pump can easily be performed with PTFE-designed pump. The fluoro polymer can withstand chemical vapors, and if gas ballast is installed in the pump, it can tolerate high condensates. Due to these integration, they have become applicable for gel dryers, centrifugal concentrators, rotary evaporators, and vacuum ovens.
To make PTFE pumps more efficient in evaporative applications, integrated systems are available, which provide solvent recovery. In this system, a catching tool is fitted that captures the liquids, which can condense in the line and diminish performance. Moreover, to catch the solvents at outlet at atmospheric pressure, cold-water condenser is installed. More controlling electronic elements are added for applications, like rotary evaporation, which are prone to bumping.
To compensate further for the bumping issue in rotator pumps, pumps with special vacuum control are available that has software and are fitted with speed-controlled motor, which let pump to search and track the boiling point curves by itself. Moreover, as the software optimizes the vacuum level, it acts independently without any assistance and operator, making it partially automated.
Evidently, oil-less vacuum pumps are the future of vacuum pumps that conform to the modern environmental regulations and has application in a wide range of industries.