MXQ is an extremely reliable manufacturer of liquid ring vacuum pumps, which are the positive-displacement pumps used in several critical process industries. MXQ vacuum pumps are available in capacities up to 17,000 CFM, which helps ensure optimum efficiency in various processes. We also provide Voith design liquid ring pumps, which are designed for capacities higher than 17,000 CFM. Our vacuum pumps are dimensionally and functionally equivalent to NASH 904 Series, NASH CL Series, and NASH SC Series vacuum pumps. The pump components are available in different materials of construction such as ductile iron, cast iron, 316 and 304 stainless steel, bronze, and aluminum bronze. These various materials enable businesses to meet the requirements of the process environments.

MXQ liquid ring vacuum pumps feature robust construction, and are easy to maintain due to few moving parts, and simple designs.

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How a Liquid Ring Vacuum Pump Works?

As the name suggests, these pumps use water or any other liquid for its operation. Similar to other standard pumps in the market, these pumps feature a bladed impeller, which is attached to the center hub. However, the only difference is these impellers are positioned off-set to the center hub.

In regular centrifugal pumps, the fluid at the pump’s suction port will have a low pressure value. However, the pressure increases when it passes through the various impeller stages. Finally, at the discharge port the pressure becomes higher. However, in the case of liquid ring vacuum pumps, air is pulled out of the low pressure vessels, such that the vessel pressure goes below the value of atmospheric pressure. This leads to the creation of vacuum conditions.

The blades located on the top of the pump remain closer to the outer wall than those at the bottom and side of the pump. Owing to this relative eccentricity, a compression is produced by the pump. This eccentricity also leads to the partial filling and emptying of the rotor chamber in the state of revolution. This partial emptying and filling triggers the piston action within each set of the impeller blades or rotor. The parts of the pump are designed such that they allow the gas to enter during the emptying of the liquid in the rotor chamber, and discharge it when the compression is completed.

How a Liquid Ring Vacuum Pump Works

How a Liquid Ring Vacuum Pump Works




MXQ’s liquid ring vacuum pumps provide sustainable productivity in harsh environments in the following industries:

  • Food Processing Plants: The liquid ring vacuum pumps are used for crystallization, filtration, evaporation, and freeze drying applications.
  • Chemical Industry: In this industry, the liquid ring pumps are used for critical processes such as evaporation, filtration, distillation, polymerization, and deodorization.
  • Power Generation: These pumps are regularly used in the power generation industry for the applications such as condenser air extraction, ash handling, deaeration, filtration, and waterbox priming.
  • Petrochemical: We supply liquid ring pumps for various applications in the petrochemical industry, such as vapor recovery and vacuum distillation.
  • Offshore: These pumps are regularly used in several critical and demanding offshore applications, such as seawater deaeration, drilling mud recovery, and MEG recovery


501 Series

MXQ 501 Series pumps are dimensional and functional equivalents of NASH 904 Series vacuum pumps. The following beneficial features of these pumps have contributed to their popularity in various industries:

  • These pumps feature rugged construction, and operate quietly in applications where they are installed.
  • Available in 7 models, the capacities of these pumps range from 1950 CFM – 12,800 CFM.
  • The durable construction of these pumps make them capable of handling excess carryover of heavy liquids, such as slugs.
  • The 501 Series pumps feature simple designs, which helps in their easy installation, and quick maintenance.


  • Maximum Vacuum: 700 mm Hg (27.5ʺ Hg) at sea level
  • Capacity: 3300 M3 /hr to 23400 M3 /hr (1950 CFM to 12800 CFM)
  • K.W/H.P: 110 kW (150 H.P) to 600 kW (800 H.P)
  • Discharge Pressure: Up to 700 MM Hg.


501 K
501 L
904 L
501 M
904 M
501 P
904 P
501 R
904 R
501 S
904 S
501 T
904 T



PV Series

MXQ PV Series liquid ring vacuum pumps are dimensional and functional equivalents of NASH CL Series vacuum pumps. These pumps are widely utilized in various critical industrial applications such as autoclaves, paper machine dewatering, chucking, carburetor testing, cooking, deaerating, eviscerating, priming, solvent recovery, etc. It can be seen that the wide employment of these pumps results from the following factors:

  • The pump features rugged construction, and is typically made of ductile iron, stainless steel or combination of both these materials.
  • The pumps are ideal to use when the application involves:
    • Air carrying various solid contaminants
    • Vapor that needs to be reclaimed
    • Corrosive gas or gases
  • These pumps are also ideal to use when the liquid may be carried over, or when you require noise-free, and smooth operations.


  • Maximum Vacuum: 700 mm Hg (27.5ʺ Hg) at sea level
  • Capacity: 150 to 25500 M3 /hr (88 CFM to 150,000 CFM)



PV 5
CL 200
PV 8
CL 300
PV 10
CL 400
PV 20
CL 700
PV 30
CL 1000
PV 45
PV 50
CL 1500
PV 60
CL 2000
PV 75
PV 90
CL 3000
PV 120
CL 4000
PV 180
CL 6000
PV 270
CL 9000
PV 400
CL 14000


PS Series

MXQ PS Series liquid ring vacuum pumps are used in various industrial applications such as container filling, autoclaves, labelling, forming, deodorizing, evaporating, fiber setting, eviscerating, priming, solvent recovery, and slot extraction. The following features of these pumps make them a suitable replacement for NASH SC series liquid ring vacuum pumps:

  • The pumps feature simple designs, which helps save on installation and maintenance costs.
  • These pumps are available in several models, with varying capacities.
  • Made from cast iron or 304/316 SS, these pumps can easily withstand harsh working environments in several industries.


  • Maximum Vacuum: 710 mm Hg (28ʺ Hg) at sea level
  • Capacity: 200 to 2100 M3 /hr (120 CFM to 1,240 CFM)



PS 2
SC 2
PS 3
SC 3
PS 4
SC 4
PS 5
SC 5
PS 6
SC 6
PS 7
SC 7




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