Vacuum pumps and systems are common place across a tremendous range of industries. Once the essential principles are understood, the possibilities for application become apparent. In order to properly select a vacuum system, the principles of basic vacuum technology should be understood. Once the application is clearly defined, a solution can be found by applying these methods. Since we understand and can relate to atmospheric pressure, it is chosen as a reference point. Vacuum is simply a pressure that exists below atmospheric pressure. To create a vacuum in a vessel, a vacuum producing device needs to remove mass from it. The more mass that is removed, the lower the pressure that exists inside the vessel. This is why it is important to understand what vacuum is and how to select the right type of equipment. It is very important to size vacuum piping correctly to minimise pressure loss. The greater the pressure loss, the larger the vacuum equipment needs to be. The type, quantity of gas handled, and the operating pressure, normally defines what vacuum pump can be used. If the gas consists of mainly non-condensable, then most types of pumps can be used. If the gas consists of non-condensable and condensables, then the choices will be limited. Therefore a right solution considering the load of condensable and ultimate vacuum should be struck. System selection To select the best type of system for a particular application, the following list needs to be considered.
Once it is determined which criteria is the most important from the list, then the vacuum pump that best meets this can be selected. Operating cost Solvent recovery Effect on process Materials of construction Operating range Reliability Waste generation Pollution abatement Emission reduction Maintenance cost Ease of cleaning Serviceability Purchase price
Pharmaceutical and chemical industry The pharmaceutical and specialty chemical industries use vacuum for distillation and drying. Various types of dryers are used to purify products under vacuum. The chemicals are precisely mixed and then heat is applied in the dryer to evaporate the excess chemicals. This is done under vacuum for purer end products; reduce the amount of heat energy required for drying, and also to recover any of the solvents evaporated off thereby not affecting thermally sensitive products. Pumps that are reliable and easy to service in the field are the most important for this industry. If an unreliable pump is tried and it fails in the middle of a drying cycle, then the product is not useable and profit is lost.
A typical setup used for this application is: Combining mechanical roots blower along with oil lubricated vacuum pump. This kind of setup is used to minimise utility costs, drying cycle time and contamination. A properly designed process condenser between your vacuum process and vacuum producing system will yield significant advantages.

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  Vacuum pumps and systems are common place across a tremendous range of industries. Once the essential principles are understood, the possibilities for application become apparent. In order to properly select a vacuum system, the principles of basic vacuum technology should be understood. Once the application is clearly defined, a solution can be found by applying these methods. Since we understand and can relate to atmospheric pressure, it is chosen as a reference point. Vacuum is simply a pressure that exists below atmospheric pressure. To create a vacuum in a vessel, a vacuum producing device needs to remove mass from it. The more mass that is removed, the lower the pressure that exists inside the vessel. This is why it is important to understand what vacuum is and how to select the right type of equipment. It is very important to size vacuum piping correctly to minimise pressure loss. The greater the pressure loss, the larger the vacuum equipment needs to be. The type, quantity of gas handled, and the operating pressure, normally defines what vacuum pump can be used. If the gas consists of mainly non-condensable, then most types of pumps can be used. If the gas consists of non-condensable and condensables, then the choices will be limited. Therefore a right solution considering the load of condensable and ultimate vacuum should be struck. System selection To select the best type of system for a particular application, the following list needs to be considered.
Once it is determined which criteria is the most important from the list, then the vacuum pump that best meets this can be selected. Operating cost Solvent recovery Effect on process Materials of construction Operating range Reliability Waste generation Pollution abatement Emission reduction Maintenance cost Ease of cleaning Serviceability Purchase price
Pharmaceutical and chemical industry The pharmaceutical and specialty chemical industries use vacuum for distillation and drying. Various types of dryers are used to purify products under vacuum. The chemicals are precisely mixed and then heat is applied in the dryer to evaporate the excess chemicals. This is done under vacuum for purer end products; reduce the amount of heat energy required for drying, and also to recover any of the solvents evaporated off thereby not affecting thermally sensitive products. Pumps that are reliable and easy to service in the field are the most important for this industry. If an unreliable pump is tried and it fails in the middle of a drying cycle, then the product is not useable and profit is lost.
A typical setup used for this application is: Combining mechanical roots blower along with oil lubricated vacuum pump. This kind of setup is used to minimise utility costs, drying cycle time and contamination. A properly designed process condenser between your vacuum process and vacuum producing system will yield significant advantages.

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