Water Eductors for Evacuation of Reactors & Vessels

Evacuating Gases or Air from Vessel or Reactors is a common requirement in the Chemical Industry & the Pharmaceutical Industry and is required for following purposes
• For evacuating air from vessels before filing of gases
• For degassing of liquids using vacuum
• For creating vacuum in reactors before beginning of batch process production

But at the same time the evacuating equipment working in the Chemical & Pharmaceutical Industry also faces the below challenges
• Corrosion due to presence of corrosive gases and vapours
• Liquid droplets & Solid particles carryover
• Less tolerance for shutdown as vacuum is essential for production.

Water Eductors utilize the energy in pumped water for their operation and can be put to use to create vacuum conditions at its suction inlet.

Water Eductors are essentially Liquid jet Vacuum Ejectors that operate on the basis of the jet Venturi principle.

The capacity of the Water Eductor or 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 Water Eductor or Liquid jet Vacuum ejector can develop ultimate vacuum upto 30 Torr i.e 40mbar.
The water Eductor commonly operates with wide range of motive liquid pressure from 2.5 bar(a) to 7 bar(a).
Water Eductors tend to have large suction flows at ambient & low vacuum pressures, this helps the Water Eductor in performing rapid evacuation initially. Combining that with its ability to develop high ultimate vacuum, the Water Eductor can evacuate a vessel / Reactor to high vacuum in less time.

Water Eductors are suited for the process vacuum demands in the Chemical & Pharmaceutical sector because of their inherent characteristics

• Ability to evacuate reactors / vessels to high vacuum conditions – eliminates the need for any additional boosting equipment.
• Low Evacuation 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
• Water Eductors 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
• Service Water at 2.5~7 bar(a) is a commonly available utility and hence no additional infrastructure is typically required.