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Pump Priming Ejectors

Pump Priming: <br>• The suction line of a Centrifugal Pump needs to run full of liquid for the pump to start with the pumping.<br>• 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.<br>• 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.<br>• Improper priming results into formation of gas pockets in the pump impeller which prevent liquid flow.<br>• Running the pump with improper priming leads to overheating of the motor and mechanical damage to the pump.<br>

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Pump Priming Ejectors

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  1. 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:

  2. 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:

  3. 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 Bar(g). 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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