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CDX Chemical Dry Vacuum Pumps

Continuous performance from atmospheric pressures to ultimate vacuum


Effluent-free vacuum for the chemical, pharmaceutical and petrochemical industries

Featuring an innovative double-ended screw mechanism, our CDX pumps have a pumping capacity of 900 m3h-1 (per hour) – perfect for your larger processes where repeatability and reliability are key.

High throughput processes

When you work in critical applications, you need a reliable pump. The CDX pump is a robust high-performance machine that is highly tolerant to process malfunctions, delivering continuous performance you can rely on, from atmosphere to ultimate vacuum.

Designed for harsh environments and processes

Edwards’ standard indirect cooling ensures exceptional temperature control, including protection from thermal shock and corrosion. The pump has excellent liquid handling capabilities and is dust and particulate tolerant, making it a first choice for numerous chemical, pharmaceutical and petrochemical applications.

Application-specific modules

A range of Edwards’ pre-engineered modules can help you to meet your specific application needs. One single design includes options for multiple applications available as stand-alone pumps or complete systems, including mechanical boosters for your higher pumping capacities.

Easy to maintain

The CDX is designed to minimise your scheduled downtimes, from line maintenance to overhaul. On-site maintenance and cleaning options include bearing and seal change and cleaning of flame arrestors, with minimal process line disturbance.

Saving you operating costs

Cooled, filtered oil for the bearings and rotor stub shafts avoids carburization and degradation, allowing you to save on costs by increasing mean times between maintenance and extending the overall life of the pump.

You can call on our expert applications engineering to help you optimise:

  • Process design
  • Equipment selection
  • Integration into your plant control philosophy
  • Safety considerations
  • Advice at start-up, commissioning and training

Our experienced chemical applications team are here to provide expert advice on the correct pumping system for your process, anywhere in the world.

  Units 50/60 Hz
Maximum pumping speed m3/h 900
ft3/h 530
Capacity at 10 mbar (7.5 Torr) m3/h 900
ft3/min 530
Ultimate vacuum mbar 0.005
Torr 0.004
Maximum back pressure - standard mbarA 1150
psig 2
Power consumption at 10 mbar (7.5 Torr) kW 17.1
hp 23.2
Standard motor (380 - 460 ± 10%, 3 ph, 50 Hz) kW 30
Standard motor (380 - 460 ± 10%, 3 ph, 60 Hz) hp 40
Cooling water flow rate (adjustable)  l/min 10 - 20
gal min4 2.64 - 5.28
Cooling water supply temperature range °C / °F 5 - 35 °C / 41 - 95 °F
Cooling water supply pressure barg 02 - 10
psig 29 - 145
Seal purge flow (maximum), regulated to 0.3 - 0.5 barg (5 - 7 psig) l/min 24
ft3 /min 0.85
Seal purge supply pressure (minimum - maximum)  barg 02 - 10
psig 29 - 145
Noise (maximum with  exhaust silencer) dB(A) 82
Weight (with frame and standard motor) kg 1710 / 1705
lbs 3765 / 3745
Process connection, inlet ANSI/DIN 6"/DN150
Process connection, outlet ANSI/DIN 3"/DN80
Pumping mechanism Variable pitched screw
Edwards employees standing in corridor smiling

Read more on our offerings in Service Solutions