Pump Priming Ejector

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Pump Priming: • The suction line of a Centrifugal Pump needs to run full of liquid for the pump to start with the pumping. • This creates a problem when there’s a positive height difference between the Pump Suction level and Sump liquid level. This height difference is known as Suction lift. • Hence the liquid needs to be drawn upto the pump level to ensure pumping start-up. The process of ensuring liquid presence in the suction line of the pump is known as Priming. The Priming process is a compulsory part of pump operation. • Improper priming results into formation of gas pockets in the pump impeller which prevent liquid flow. • Running the pump with improper priming leads to overheating of the motor and mechanical damage to the pump.

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Presentation Transcript

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Pump Priming Ejectors Pump Priming:  The suction line of a Centrifugal Pump needs to run full of liquid for the pump to start with the pumping.  This creates a problem when there’s a positive height difference between the Pump Suction level and Sump liquid level. This height difference is known as Suction lift.  Hence the liquid needs to be drawn upto the pump level to ensure pumping start-up. The process of ensuring liquid presence in the suction line of the pump is known as Priming. The Priming process is a compulsory part of pump operation.  Improper priming results into formation of gas pockets in the pump impeller which prevent liquid flow.  Running the pump with improper priming leads to overheating of the motor and mechanical damage to the pump. Ejectors for Pump Priming:

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 Ejectors operate by creating a vacuum inside the suction line of the pump. The vacuum draws the liquids from sump upto the pump elevation.  Ejectors require a Compressed Air Supply as an Energy input. Easy availability of Compressed air and minimal flow requirement allows the Ejector to be easily accommodated by the existing facility.  Unlike other priming arrangements such as Foot Valves Priming Tanks Ejectors do not require any auxiliary liquid pump for its working.  Ejectors are also superior to Vacuum Pump Technology for Priming due to the following reasons:  Liquid Ring Vacuum Pumps require a Water/Liquid supply for their operation. In most of the cases Water/Liquid supply cannot be provided unless the Centrifugal Pump in question is started.  Dry vacuum pump technology doesn’t tolerate liquid ingestion and is not economically feasible for the application.  Vacuum Pumps require considerable maintenance. The high maintenance cost drives the total Lifecycle Cost up. Crystal TCS’s Priming Ejectors:

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 Designing a Priming Ejector is largely a function of the involved pumping system.  Our Engineers after carefully assessing the requirements of associated Pumping Systems have developed a specific set of rules for Priming Ejectors in order to achieve consistent Priming within minimum time with minimal Motive Consumption.  We also provide automated control to start and stop the ejector automatically during the pump start-up process.  Our Priming System consists of a Priming Ejector automated air supply valve set to the required Suction lift and a Discharge Silencer. Salient Features of our Priming Ejectors:  A wide range of models to choose from enables achieving optimum priming time.  Can easily provide Suction Lifts upto 9m for water pumps.  Can operate with Compressed Air pressures as less as 3 Barg.  Rugged construction and compact size enable installation in difficult to access areas.  We manufacture Ejectors in a wide variety of materials Carbon Steel Stainless Steel and FRP to suit the pumping liquid’s corrosive effects.  Easily tolerate Liquid ingestion.  Reliable and Maintenance free operation.  Silent operation. Applications:  Priming for Centrifugal Pumps with large size Suction lines 4” and more.  Priming for Seawater Pumps.  Priming for Corrosive Liquid Pumping. For More Information Please Contact us or call on +91 253 2501600 / 9921391762. http://www.crystaltcs.com/pump-priming-ejectors.php

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