Priming Ejectors for priming of Centrifugal Pumps

For a Centrifugal Pump to start operation the suction line and pump casing needs to be filled up by the liquid. The process of filling the suction line and pump casing is known as priming.
Priming is an essential operation during start-up of Centrifugal Pumps.
For Large pumps or for pumps with large suction pipelines, the best alternative to carry out priming is to evacuate the air from the suction pipelines and create vacuum in it.
The created vacuum draws Liquid from the sump and reservoir and the system gets primed.

Priming Ejectors are simple devices that operate on the basis of the jet Venturi principle.
Priming Ejectors utilize the energy in compressed air for their operation and create vacuum at its suction inlet.

The suction inlet of the Priming Ejector is connected to the Suction Pipeline and Centrifugal Pump casing. This enables the Priming Ejector to evacuate the air inside the Suction Pipeline and draw liquid upto the pump level.

Priming Ejectors are best suited for priming of Centrifugal Pumps due to their inherent characteristics
• Ease of Operation – The ejector is switched On/Off entirely by controlling the Air / flow to the ejector. Hence it is not necessary to access the ejector for controlling its operation.
• Priming 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
• Compressed air is a commonly available utility and hence no additional infrastructure is typically required.