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COBRA NX 0450 / 0650 A

  • Advanced Screw Design
  • Efficient: low energy consumption, minimal maintenance, minimized operating costs
  • Robust: high vapor and particle tolerance, self-draining
  • Compact Design
  • Quiet Operation

The COBRA NX is a series of high-performance and robust dry screw vacuum pumps for industrial applications. These vacuum generators are in use wherever gases and vapors need to be pumped reliably. The proven, completely dry screw vacuum technology allows the COBRA NX to run without operating fluids in the compression chamber. In practice this means no contamination of the pumped medium, and no environmental emissions. In addition, no costs arise for the purchase, replacement and disposal of operating fluids. Maintenance tasks such as oil changes or filter replacement are no longer required or are reduced to a minimum.

Vacuum pumps of the COBRA NX series are robust, extremely reliable and highly efficient – and the most advanced screw vacuum pumps on the market today. They operate efficiently throughout their vacuum range, and deliver constantly high pumping speeds.

COBRA NX dry screw vacuum pumps  dry compression, a specially developed screw profile, and unimpeded gas discharge. The result is a high degree of vapor and particle tolerance. Their design ensures an even heat distribution over the whole pump stage, reducing thermal stress and increasing service life.

The screws are manufactured from a singlepiece casting avoiding any gaps, making it impossible for process fluids or particles to enter, and thereby preventing contamination.

The compact dimensions of the COBRA NX permit installation in confined spaces. Its modular construction allows simple combination with Panda vacuum boosters by Busch, which can be fitted directly by a flange connection. The COBRA NX / vacuum booster combination improves both ultimate pressure and pumping speed significantly, making it the perfect combination for medium vacuum applications.


  • Heat treatment
  • Coating
  • Vacuum drying
  • Vacuum packaging
  • Degassing

COBRA NX – the robust and reliable solution for industrial applications.

Would you like to know more?
Contact us directly (Busch United States):
+1 757 463 7800 Get in contact

Technical specifications
Two screw rotors inside the cylinder of the COBRA NX rotate in opposite directions. The pumped medium is trapped between the cylinder and screw chambers, compressed, and transported to the gas outlet. During the compression process the screw rotors do not come into contact with each other or the cylinder. Thus, no lubricants or operating fluids are required in the compression chamber. COBRA NX series vacuum pumps use efficient water cooling resulting in an even temperature distribution throughout the pump body, and guaranteeing thermal stability throughout the process.

Accessories/technical options

  • Sealing gas supply for seals used with applications particularly subject to damp or dust
  • Gas-ballast valve to increase water vapor tolerance
  • Exhaust gas silencer to reduce noise

COBRA NX 0450/0650 A
COBRA NX 0450/0650 A
Pumping speed

Air at 70 ºF. Tolerance: ± 10%

60 Hz
Pumping speed
Technical data COBRA NX 0450 A COBRA NX 0650 A
Max. pumping speed ACFM 60 Hz 247 383
Ultimate pressure Torr ≤ 0.075 ≤ 0.075
Nominal motor rating kW (HP) 60 Hz 9.5 (12.7) 17 (22.8)
Nominal motor speed RPM 60 Hz 3600 3600
Sound level (ISO 2151) dB(A) 60 Hz 70 75
Approximate weight Lbs. 1100 1540
Dimensions (L x W x H) inches 52 x 17 3/4 x 21 11/16 59 7/8 x 20 5/8 x 24 ½
Gas inlet / Gas outlet ISO-F G 3"/ DN 100 ; G 2"/ DN 63 G 3"/ DN 100 ; G 3"/ DN 100


COBRA NX 0450 / 0650 A

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