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Liquid jet Vacuum Ejectors for Liquid Degassing

Multiple Batch production processes in the Chemical and Pharmaceutical Industries require that the gases dissolved in liquid be separated before beginning of production or at the end of production process.
The process of removing gases dissolved or trapped in liquid is known as degassing.
An efficient method of degassing liquids is to apply vacuum. When vacuum is applied trapped gases tend to rise from the liquid due to reduced pressure, these trapped gases once liberated are sucked by the vacuum system.
As the vacuum increases small quantity of liquid also vaporizes and is sucked away by the vacuum system.

But at the same time the vacuum equipment also faces the below challenges
• Corrosion due to presence of corrosive vapours generated from the liquid
• Liquid droplets & Solid particles carryover
• Less tolerance for shutdown as vacuum is essential for production.

Liquid jet Vacuum Ejectors are simple devices that operate on the basis of the jet Venturi principle.
Liquid jet Vacuum Ejectors utilize the energy in pumped water for their operation and can be put to use to create vacuum conditions at its suction inlet.

The capacity of the Liquid jet Vacuum Ejector in terms of suction flow and max vacuum depends upon the internal design of the ejector and the operating pumped water pressure.
A Liquid jet Vacuum Ejector can develop ultimate vacuum upto 30 Torr i.e 40mbar.
The Liquid jet Vacuum Ejector commonly operates with wide range of motive liquid pressure from 2.5 bar(a) to 7 bar(a).
Liquid jet Vacuum Ejectors tend to have large suction flows at ambient & low vacuum pressures, this helps the Liquid jet Vacuum Ejector in performing rapid evacuation initially. Combining that with its ability to develop high ultimate vacuum, the Liquid jet Vacuum Ejector can evacuate the degassing vessel to high vacuums quickly and higher the vacuum better is the degassing efficiency.

Liquid jet Vacuum Ejectors are suited for the degassing demands in the Chemical & Pharmaceutical sector because of their inherent characteristics
• Good degassing performance due to the ability to evacuate degassing vessels to high vacuum conditions – as higher vacuum lead to more efficient degassing
• Low degassing time
• Can be manufactured in a large range of materials (Plastics, Stainless Steels, Exotic Materials)– it helps to select the best possible material compatible with the involved chemicals and reduces the risk of corrosion
• Liquid jet Vacuum Ejectors do not contain any moving parts and have large internal passage areas, hence are not vulnerable to liquid entry or clogging by solid particles.
• As they have no moving parts, maintenance requirements are very less. Also it reduces largely the risk of abrupt breakdowns, helps in maintaining the regular production schedule
• Most applications operate the Liquid jet Vacuum Ejector with Service Water and Service Water at 2.5~7 bar(a) is a commonly available utility and hence no additional infrastructure is typically required.