Vacuum Pump for Environmental and Energy-saving Needs

 The dry-compressing Everest vacuum pump is oil-free and made by Everest Vacuum in India. Screw vacuum pumps are industrial vacuum pumps that are at the top of their class. The Dry Screw series is well-suited for many manufacturing processes. Pumps in industrial settings need to deal with not only clean air but also particles, dirt, and outgassing media and vapors. Some processes are not stable and may be affected by many factors. All of these factors must be tolerated by the pump. According to Everest Vacuum, screw vacuum pumps are the best option for these demanding requirements. By definition dry vacuum pumps do not use oil or water, unlike other oil-ring and water-ring pumps.  Thus, dry pumps are gaining attention in the industry.
 

 

Benefits of Everest Roots Vacuum Pumps:
 

1.  Large Inlet & discharge make it easy to maintain and inspect.
2. The high precision machined rotor results in high volumetric efficiency and can achieve strong vacuum levels of upto 0.01 mBar. 
3. The pump uses two-lobe root type rotors and achieves low noise levels and vibrations with properly balanced rotor motion.
4. The pump chamber does not require any lubricants. There is no oil backwash to the high vacuum side. This allows for a clean & 100% dry vacuum.
5. The shaft is sealed using a patented dry sealing combination, which has capability to withstand oil, dust and dirt contamination coming from the process. 
6. The pump emits no oil mist; this reduces the environmental impact as well as the health risks for the operator.
7. Operation can be started at atmospheric pressure, and performance is stable across a wide range of pressures, for machines that are coupled with variable frequency drives. 
8. It is possible to continue long-term operation without wear and maintenance is easy & economical.
9. You can drain and recover gas condensate.
10. This simple design provides outstanding durability.

Typical Installations of Dry Vacuum Pumps: 

• In Vacuum Desiccation

Because of their potential to damage the ozone layer, organic chlorofluorocarbon solvents like Freon and trichloroethane cannot be used in steam cleaning. For degreasing parts after washing, roots-type vacuum pumps are becoming a popular choice.
 

• In Vacuum Distillation

Vacuum distillation is a method that separates mixed substances into their constituents at low temperatures. Vacuum pumps made from dry roots are widely used in manufacturing equipment for food, pharmaceuticals, and vitamins.

• In Vacuum Packing

Vacuum-packing fresh foods such as vegetables, meats and fish are easier with oil-free vacuum pumps. Vacuum-packing precision components and antioxidation parts can also be done with dry roots vacuum pumps.

Why do dry vacuum pumps use in the chemical industry?

The dry screw vacuum pump is used in several different fields. However, this technology is broadly used in the pharmaceutical and chemical industries. But it’s relatively new in the vacuum pump technology, which is mainly ruled by the liquid ring technology. However, the main difference is that the dry screw vacuum pump doesn’t require operating fluid to condense the process gas.

Principle of vacuum pump

In a dry screw vacuum pump, two screw motors are placed in the opposite direction, which helps in pumping the process gas trapped between the cylinder and the screw chambers, which gets transported to the gas discharge. In the chemical process vacuum pump, cooling can be carried out through a high-quality air cooling process, resulting in uniform temperatures throughout the cooling process as it eliminates the need for an indirect cooling process or cooling water, which further wipes out cold spots. Meanwhile, the modern screw vacuum pump uses pitch screws, leading to pre-compression of the gases in the pump. 

Advantages of dry vacuum pumps

The dry vacuum pump is used in several different fields. Here are the following advantages of dry vacuum pumps are:

• High vacuum level
• It follows dry compression, which means no reaction or contamination occurs between operating fluid and possess gas.
• Energy efficient
• The chemical process vacuum pump is designed to function for almost all process gases due to its perfect temperature regulation and material selection.

Disadvantages of dry screw vacuum pumps

Here are the following disadvantages of dry screw vacuum pumps.

• As per the dry vacuum pump manufacturers, the dry screw vacuum pump can’t be used with those process gases which are likely to react under high temperature.
• Dry vacuum pumps are also sensitive to tiny particles which can enter the system.

In short, a dry vacuum pump is widely used in the chemical process due to its advantage of functioning under the high-temperature regulation and material used for making the dry vacuum pump. However, for better functioning under any chemical system dry vacuum pump which uses different compression systems must use various coatings to regulate better functioning. 

How to protect dry screw vacuum pumps from corrosion?

Vacuum plays a vital role in several industrial processes, including pharmaceutical and chemical processes. Whether in inertization, vacuum conveying, distilling, or drying, vacuum is generally used to make the procedure work smoothly, fastly, and safely. However, there are various types of vacuum technologies. These include:

• Liquid ring vacuum pumps and steam ejectors are the types of pumps used for decades to generate vacuum and work as robust workhorses.
• Rotary vane vacuum pumps are also used to generate vacuum, but they have one advantage: these pumps have recirculating oil lubrication that smoothens the industrial vacuum systems process.  

While liquid ring vacuum pumps don’t have recirculating oil lubrication thus, they require operating fluid to reach the process gas during the procedure.

 

 

 

Working principle of dry screw vacuum pump

Dry vacuum pumps consist of two screw rotors that rotate in clockwise and anticlockwise directions. While the pumped medium is sandwiched between the screw chambers and the cylinder. So it gets compressed and later transferred to the outlet for further procedure. However, during this procedure, a gap remains in between the screw rotors, and they never come in contact with the cylinder. Further, cooling can be done through water or air cooling.

How to protect the vacuum system?

Typically, vacuum pumps deal with several risk factors depending on the process gas. Thus, it’s crucial to use process gas which can minimize such risks. Further, to protect the dry vacuum pump, you must also focus on the various components that can be fixed on the pressure side or inlet. So it can quickly transfer the pressure gas without even damaging the pump.

It’s called a vacuum system, and to safely operate this vacuum system; it’s crucial to protect it from deposits and corrosion. It can happen due to polymerization or crystallization.

Protection against corrosion 

• Firstly, it’s crucial to prevent the entering of corrosive materials inside of the vacuum pump. It can be achieved by using gas scrubbers or upstream condensers.
• Secondly, use a specific operating temperature to keep the streaming process in the gas phase.
• Thirdly, it’s better to use compatible materials to boost the vacuum pump performance and prevent corrosion.  

In short, the dry screw vacuum pump can help perform the industrial vacuum systems process without the help of operating fluid. So it can compress the pressure gas to transfer to the outlet quickly. But for this, it’s better to use corrosive-resistant materials.

Dry Screw Vacuum Pump and Its Advantages

 Dry screw vacuum pumps are the latest edition to the industry. These work on the principle of no lubricants i.e. no water, no oil, which makes the dry screw pumps ecologically sound. Dry screw pumps consist of two screws rotating in opposite directions and the gas moves in the screw's axis. They are designed in different configurations to meet different needs. They can be often used in combination with a variety of pumps to work for any specific requirement.

Principle of operation

The dry screw vacuum pumps are worked under a pump casing which consists of two screw rotors with no friction between them, supported by bearings. It sucks the air in and pumps the medium between the cylinder and screw chambers and then transfers it to the gas exhaust. These pumps are very stable and produce less noise and required no lubricating oil for application. These pumps have a wide range of applications in different industries like steel plants, agrochemical industries, and many more.

Advantages of dry screw vacuum pumps

Following are some of the advantages for dry screw vacuum pump-

It has a very high pumping capacity.
Friction-free operation in different chambers.
It does not require the consumption of fuel, and results in zero leakage.
The operation and maintenance cost is low.
Highly efficient for various operations.
The pumps have anti-corrosion coating, which makes them highly durable
Environment-friendly because of no water, no oil principle.
No contamination of medium as it is directly discharged from the pump body.
It has dust resistance properties.

Application

Dry screw pumps have various applications in industrial vacuum systems. It is used for the distillation of chemicals, biodiesel, oil, polymer industries, oil refining industries. It has wide usage even in the food industry for packaging, drying, and processing, these pumps are used because of their no contamination of medium quality. It has application in steel plants due to its dust resistance property and high durability.

Dry screw pumps are mainly used with equipment like reactor distillation, multi-phase transportation of liquid, gas, or solid, oil-water separating devices, wastewater treatment system, column distillation, fractional distillation, etc.

These are some of the advantages and applications of dry screw vacuum pumps, which is using widely in the pumping industry as a latest and advanced technology to fulfill the specific needs.