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Liquid Ring Vacuum Pumps

As a leader in vacuum technology, Edwards has developed a portfolio of liquid ring vacuum pumps to meet the demanding applications in process industries. Their pump range includes both one and two stage machines enabling optimum efficiency for processes operating across the vacuum range. Pump capacities up to 40,000 m³/h are available in one stage and 7,500 m³/h in two stage models. In addition, our ELRi range combines years of comprehensive know-how and innovative technical expertise to develop a revolutionary range of intelligent and connected liquid ring vacuum pumps.

Edwards have many years of experience in the design, engineering, assembly and testing of bespoke liquid ring pump and hybrid vacuum systems for the process markets, with equipment supplied for various process applications providing customised solutions to meet customer requirements.

Liquid Ring Vacuum Pump Services

Installation of vacuum pumps to ensure safe and correct integration with existing process equipment.
Planned preventative maintenance and repair programmes that minimise downtime and extend equipment life.
Rapid turnaround on repairs supported by an extensive stock of genuine manufacturer spare parts.
Calibration and performance verification of sensors, gauges, and control systems to maintain operational accuracy.
Expert technical consultation from experienced sales specialists who help specify the best system for your application, capacity, and operating environment.
Factory-trained service engineers who provide reliable on-site support and troubleshooting across all installed systems.

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HR Series | Liquid Ring Vacuum Pumps

The Edwards HR series, which includes the EHR and SHR models, brings you continuous reliable operation at low pressures. The range is designed to be t...

More About HR Series | Liquid Ring Vacuum Pumps

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HR Series | Liquid Ring Vacuum Pumps

The Edwards HR series, which includes the EHR and SHR models, brings you continuous reliable operation at low pressures. The range is designed to be tolerant of particulates and requires minimal maintenance, making it ideal for use in your power generation, chemical and process applications.

HR Series Overview

Peak efficiency at high vacuum: The two-stage vacuum pump systems offer capacities of 7,500 m³/h with exceptional performance, particularly useful for handling solvents at high vacuum, with low suction pressures.
Engineered to order: We can help to meet your specific requirements by creating a liquid ring pump solution designed for your precise process application.
ATEX versions available: The HR series is available as part of ATEX category 1 or category 2 pump systems. We can supply pumps that are designed for trouble-free operation in your hazardous environments, without the need for flame arrestors.
You choose what suits you best: Our Liquid Ring Pumps are offered as standard packages in three basic configurations: Once Through; Partial; Total Re-circulation mode. You can choose the configuration that suits your application or discuss the options with our experienced engineers.
Suitable for a wide range of process industries: The HR series is ideal for the Food Processing, Petrochemical, Chemical, Fine Chemical, and Pharmaceutical, Power Generation and offshore drilling and seawater deaeration industries. For more information, please do get in touch with your local applications team who will be happy to help you specify the right solution for your process.

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LR Series | Liquid Ring Vacuum Pumps

The LR Series Liquid Ring Vacuum Pumps are designed for rough vacuum applications in the chemical and allied process industries. Offering peak perfo...

More About LR Series | Liquid Ring Vacuum Pumps

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LR Series | Liquid Ring Vacuum Pumps

The LR Series Liquid Ring Vacuum Pumps are designed for rough vacuum applications in the chemical and allied process industries. Offering peak performance at low suction pressures, the LR1A and LR1B single-stage models from Edwards Vacuum, are tolerant of particulates and operate with minimal maintenance and noise, making them ideal for your continuous operations in the power, chemical and process industries.

These pumps are engineered to order by Edwards Vacuum. Using their years of experience in designing, engineering and assembling liquid ring vacuum pumps, they will design your pump to meet your process and project-specific requirements.

LR Series Overview

Engineered to order: We can help you to meet your process and project specific requirements, using our years of experience to design, engineer, and assemble LR pumps to order.
A choice of configurations: Our Liquid Ring Pumps are offered as standard packages in three basic configurations: Once Through; Partial; Total Re-circulation mode. We can help you to choose the best configuration for your application.
Suitable for a wide range of process industries: The LR1A series of pumps are ideal for the filtration, vacuum forming, general industrial applications, chemical and petrochemical applications. The LR1B series of pumps are ideal for fly ash conveying, pulp and paper, filtration, flue gas desulphurization, methane extraction in mining and chemical and petrochemical applications.

Standard LRP Packages

Liquid ring vacuum pump performance is dependent upon the seal liquid properties; the seal liquid must be at a temperature which is low enough to enable the pump to operate at the desired suction pressure. To minimise the amount of seal water required it is often desirable to recycle the seal water back into the liquid ring pump, to enable this either some of the water must be replaced with fresh cooled water (partial re-circulation) or it should all be cooled by a heat exchanger (total re-circulation).

A choice of configurations:

The Liquid Ring Pumps are offered as standard packages in three basic configurations: Once-through; Partial; Total Re-circulation mode. The optimal configuration will depend on your application.
Once Through Operation: Used where an ample supply of service liquid which can be discharged to drain is available.
Partial Re-circulation: Operation The discharged seal liquid and gas stream is separated in the discharge separator, fresh liquid is added is reduce the temperature of the recycled mixture and the excess liquid goes to drain. This will reduce seal liquid usage by up to 50%.
Total Re-circulation Operation: Used when seal liquid is in short supply or contamination of drains is an issue. To enable total re-recirculation the separated liquid must be cooled before it is re-used. This is done by including a plate-type heat exchanger in the return line

The LR Vacuum Pumps are suitable for a wide range of process industries. The LR1A series of pumps are ideal for filtration, vacuum forming, general industrial applications, and chemical and petrochemical applications. The LR1B series of pumps are ideal for fly ash conveying, pulp and paper, filtration, flue gas desulphurization, methane extraction in mining and chemical and petrochemical applications.

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