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COBRA NC/AC 0630 - 2000 B/C/F VR

  • Explosion-Proof:
    ATEX certified, gas temperatures < 100°C
  • Robust:
    high vapor and condensate tolerance, anti-corrosion coating on internal components
  • High Performance:
    high pumping speed at all inlet pressures
  • Efficient:
    low energy consumption, minimal maintenance, minimized operating costs


Busch COBRA VR dry screw vacuum pumps have been specifically designed for the stage I recovery of petrol and other hydrocarbon vapors in the petrochemicals industry. The design of the COBRA VR series is based on the long experience and close involvement of Busch in this sector.

The COBRA VR series is a range of highperformance dry screw vacuum pumps for use with corrosive chemicals and in harsh industrial environments. Safety and reliability are the most important features of these vacuum pumps. Their robust design ensures a life cycle of more than 20 years with minimal maintenance requirements. Today, they are in operation throughout the world in a wide range of climate conditions, particularly in the petrochemicals industry.

COBRA VR vacuum pumps are available in four different sizes, with pumping speeds from 400 to 1530 ACFM at 60 Hz. The range of sizes allows these vacuum pumps to be matched precisely to the process, resulting in effective and efficient hydrocarbon vapor recovery whilst maintaining the highest standards of environmental compatibility and cost-effectiveness.

COBRA VR dry screw vacuum pumps feature dry compression, a specially developed screw profile, and unimpeded gas discharge. The result is a high degree of vapor and particle tolerance. Their design guarantees an even heat distribution over the whole pump stage, reducing thermal stress and increasing service life. The screws are manufactured from a single-piece casting avoiding any gaps, making the ingress of process fluids or particles impossible, and thereby preventing corrosion. The mechanical seals are highly resistant to chemicals, further increasing the reliability of COBRA VR dry screw vacuum pumps.

Optimized rotor design and pump configuration ensure low gas temperatures within the compression chamber in line with ATEX standards. In addition, COBRA VR screw vacuum pumps are equipped with a cooling system designed specifically for the extraction of petrol vapor to compensate for any induced external or internal temperature fluctuation.


COBRA VR – a safe solution for hydrocarbon vapor applications stage I.

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COBRA dry screw vacuum pumps can be used for vapor recovery in:

  1. Stage l systems:
  • Storage tank systems
  • Rail tanker filling systems
  • Road tanker filling systems
  • Loading and unloading stations for tanker ships
  • Extraction during production processes


Technical specifications
Two screw rotors inside the cylinder of the COBRA VR 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 in contact with each other or the cylinder. Thus, no lubricants or operating fluids are required in the compression chamber. The advanced screw design results in lower electrical energy consumption and a lower compressed gas heat load compared to standard screw designs. COBRA VR series vacuum pumps use efficient, indirect water cooling resulting in an even temperature distribution throughout the pump body, and ensuring thermal stability throughout the process.


COBRA NC/AC 0630 - 2000 B/C/F VR
COBRA NC/AC 0630 - 2000 B/C/F VR
Pumping speed

Air at 70 ºF. Tolerance: ± 10%

60 Hz
Pumping speed
Technical data COBRA NC 0630 C VR COBRA AC 1000 F VR COBRA NC 1500 B VR COBRA NC 2000 B VR
Pumping speed ACFM 60 Hz 400 777 824 1530
Ultimate pressure Torr 60 Hz < 15 < 15 < 15 < 15
Nominal motor rating HP 60 Hz 25 50 50 100
Nominal motor speed RPM 60 Hz 3600 3600 3600 3600
Sound level (ISO 2151) dB(A) 60 Hz 78 85 81 84
Approximate weight Lbs. 60 Hz 1940 2646 2646 3968
Dimensions (L x W x H) inches 60 Hz 74 ¼ x 26 ¼ x 30 ⅜ 80 ½ x 38 ¼ x 35 ¾ 80 7/16 x 37 1/4 x 34 3/4 94 ¾ x 39 ⅞ x 3/8 ¼
Gas inlet / Gas outlet 60 Hz ANSI 4" B16.5 / ANSI 3" B16.5 ANSI 4" B16.5 / ANSI 3" B16.5 ANSI 4" B16.5 / ANSI 3" B16.5 ANSI 6" B16.5 / ANSI 4" B16.5

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COBRA NC/AC 0630 - 2000 B/C/F VR

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