VOLM Pumps
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Vacuum Pump Series

Liquid-ring vacuum pumps and compressors

HPM Series Liquid Ring Compressors
Vacuum pumps

HPM Series Liquid Ring Compressors

Double acting design completes two suction and discharge cycles per impeller revolution, achieving high compression efficiency and self-balancing radial forces; large-diameter radial suction and discharge ports, with the conical portion extending into the impeller chamber, ensure smooth flow with minimal air and water resistance, resulting in high efficiency and low energy consumption. Designed for 2.5MPa pressure (well above operating pressure), with high safety factor.

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Dry Vacuum Pump Series

Custom Units

Screw-Roots Vacuum Unit
Vacuum pumps

Screw-Roots Vacuum Unit

The Roots-screw vacuum system achieves high pumping speeds at high vacuum through multi-stage pumps in series for pressure boosting. During operation, each stage works in collaboration to gradually increase the vacuum level and efficiently extract gases. It operates without oil, water, or other sealing fluids, making it a suitable replacement for conventional liquid ring, slide valve, and reciprocating vacuum systems in most applications. Adhering to the innovative philosophy of "one design per operating condition", Volm can precisely select pump models and customize solutions based on specific user conditions, providing the most suitable Roots-screw vacuum system solutions.

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Roots-Liquid Ring Vacuum Systems
Vacuum pumps

Roots-Liquid Ring Vacuum Systems

The Roots-liquid ring vacuum system is composed of a liquid ring pump as the backing pump and a Roots pump as the main pump in a series configuration. The liquid ring pump is used to initially evacuate the vacuum system and then the Roots pump further enhances vacuum level, with both working synergistically for efficient gas extraction. Volm offers a wide range of multi-stage vacuum systems, providing complete engineering solutions that cover instrumentation, condensers, control devices, piping and valves, and partial or full working fluid circulation systems, offering users one-stop service.

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