Ring Vacuum Pump

Principle of Ring Vacuum pump operation

Inside the pump body, the seal liquid forms the ring inside the pump body as the impeller spins that creates the small chambers for gas to be trapped. The axis of the rotor is eccentric from the body that allows filling and emptying each rotor chamber during a single revolution. The vacuum inlet and the atmospheric discharge ports provide the flow paths to the gas mixtures. Dissipating the heat of compression of gas into the seal liquid, some of the liquid is discharged. The residual water discharge and the exhaust gas is segregated from the gas stream and are directed to the house exhaust and back again to the pump respectively. Here, the seal fluid is replaced by the constant flow of cooler makeup seal fluid.

Characteristics of Ring Vacuum Pumps

Now let’s have a look at the characteristics of Liquid Ring Vacuum Pumps. Below is the list of them.

• Smooth, cool and quiet operation – The operation of the pump is relatively quiet and doesn’t exceed 85 dBA. The pump runs cool with the circulation of sealing water inside the pump.
• Accepts Carryover - The soft solids, slugs, moisture, chemicals will not damage the pump. All these impurities are washed out through the discharge of the pump.
• Easy to maintain – The liquid ring vacuum pumps have only a few components, among which there is just one moving part, the rotor. This will cut out the wear and tear, also the efforts and cost the user has to put in to maintain the pump.
• Constant operation on any level – The pump operates constantly at any vacuum level from 29 in HG Vac. to the atmospheric pressure.
• Environmental friendly – These pumps do not need an oil change, oil pans, condenser, filter or etcetera, due to which the plant rooms run cleans from oil contamination, and oil discharges to sewers.
• Longer life span – The pumps are robust in construction with only one moving part that is the rotor, which is mounted on a shaft supported by bearings and is designed to serve for a longer period with efficient operation.

Understanding the technology behind the Ring Vacuum pumps

The Ring vacuum pumps are economical and robust solutions that are designed to meet the specific requirements of customers. Talking about the design technology behind the ring vacuum pumps, it is advanced to achieve reliable performance, optimum levels in harsh industrial environments and rigorous demands.

How condensation of vapors yields a capacity bonus in ring vacuum pumps?

The dry air is compressed from vacuum to atmospheric pressure in ring vacuum pump in the same way as it is done in any other displacement type pump with an exception of less temperature of the gas stream through the pump. The humid air or gas mixtures contain considerable vapor. Some of this vapor enters the liquid ring vacuum pump condenses after it is cooled by the low-temperature seal liquid. This condensate mixes with the seal liquid and occupies much reduced space as contrasted with it being a component of the inlet gas stream. This volumetric reduction of the substance becomes the capacity bonus.

The only condensable vapor that can escape the compression contributes to the inlet capacity bonus. The condensation should occur before the chamber passes the inlet port in each rotor chamber. Any condensation occurring later will have no impact on the inlet capacity.

The liquid ring vacuum pumps are designed to handle large amounts of liquids through the inlet port. In order to maximize the condensation bonus, a little part of the liquid is sprayed into the inlet, and upstream of the vacuum pump.