Screw vacuum pumps

Busch COBRA series

The Busch COBRA NC series comprises highly efficient, dry screw vacuum pumps for industrial processes in which gases and vapours must be conveyed reliably and without contamination. The advanced asymmetric screw profile and the free gas discharge provide a high tolerance of liquids and particles.

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  • 58Models
  • 2Series
  • 70–7,385m³/h pumping speed at 50 Hz
  • 1 × 10⁻³mbar lowest ultimate pressure
  • 1.5–65kW rated motor power at 50 Hz
Operating principle: Screw vacuum pumps (schematic drawing)
Operating principle: Screw vacuum pumps

Product overview

Products of the Busch COBRA series

Use the filters on the left to narrow the models down by their key figures. Each row leads to the model with its technical data and variants.

COBRA Industry series 36 models

COBRA NS 0070 CPumping speed 70 m³/h 50 Hz85 m³/h 60 HzUltimate pressure 0.03 mbarRated motor power 4 kW 50 Hz4.4 kW 60 HzVariants
COBRA NC 0100 BPumping speed 110 m³/h 50 Hz130 m³/h 60 HzUltimate pressure 0.05 mbarRated motor power 3.5 kW 50 Hz4.8 kW 60 HzVariants 4
COBRA NC 0100 B ECOTORQUEPumping speed 130 m³/h 50 Hz130 m³/h 60 HzUltimate pressure 0.05 mbarRated motor power 4.8 kW 50 Hz4.8 kW 60 HzVariants
COBRA NS 0160 CPumping speed 135 m³/h 50 Hz170 m³/h 60 HzUltimate pressure 0.03 mbarRated motor power 5.5 kW 50 Hz6.6 kW 60 HzVariants
COBRA NC 0200 BPumping speed 220 m³/h 50 Hz265 m³/h 60 HzUltimate pressure 0.05 mbarRated motor power 6 kW 50 Hz7.6 kW 60 HzVariants 4
COBRA NC 0200 B ECOTORQUEPumping speed 265 m³/h 50 Hz265 m³/h 60 HzUltimate pressure 0.05 mbarRated motor power 7.6 kW 50 Hz7.6 kW 60 HzVariants
COBRA NC 0300 BPumping speed 320 m³/h 50 Hz385 m³/h 60 HzUltimate pressure 0.05 mbarRated motor power 7.5 kW 50 Hz9.5 kW 60 HzVariants 4
COBRA NC 0400 BPumping speed 350 m³/h 50 Hz420 m³/h 60 HzUltimate pressure 0.05 mbarRated motor power 7.5 kW 50 Hz9.5 kW 60 HzVariants
COBRA NX 0450 APumping speed 350 m³/h 50 Hz420 m³/h 60 HzUltimate pressure 0.1 mbarRated motor power 7.5 kW 50 Hz9.5 kW 60 HzVariants
COBRA NC 0300 B ECOTORQUEPumping speed 385 m³/h 50 Hz385 m³/h 60 HzUltimate pressure 0.05 mbarRated motor power 9.5 kW 50 Hz9.5 kW 60 HzVariants
COBRA NC 0400 B ECOTORQUEPumping speed 420 m³/h 50 Hz420 m³/h 60 HzUltimate pressure 0.05 mbarRated motor power 9.5 kW 50 Hz9.5 kW 60 HzVariants
COBRA NX 0450 A ECOTORQUEPumping speed 420 m³/h 50 Hz420 m³/h 60 HzUltimate pressure 0.1 mbarRated motor power 11 kW 50 Hz11 kW 60 HzVariants
COBRA NC 0500 BPumping speed 490 m³/h 50 Hz490 m³/h 60 HzUltimate pressure 0.01 mbarRated motor power 9 kW 50 Hz9 kW 60 HzVariants
COBRA NC 0630 C VRPumping speed 580 m³/h 50 Hz680 m³/h 60 HzUltimate pressure 25 mbarRated motor power 22 kW 50 Hz22 kW 60 HzVariants
COBRA NC 0600 CPumping speed 600 m³/h 50 Hz600 m³/h 60 HzUltimate pressure 0.01 mbarRated motor power 18.5 kW 50 Hz18.5 kW 60 HzVariants
COBRA NS 0600 CPumping speed 600 m³/h 50 Hz600 m³/h 60 HzUltimate pressure 0.01 mbarRated motor power 15 kW 50 Hz15 kW 60 HzVariants
COBRA NC 0630 CPumping speed 630 m³/h 50 Hz630 m³/h 60 HzUltimate pressure 0.01 mbarRated motor power 15 kW 50 Hz17 kW 60 HzVariants
COBRA NC 0630 C ECOTORQUEPumping speed 630 m³/h 50 Hz630 m³/h 60 HzUltimate pressure 0.01 mbarRated motor power 17 kW 50 Hz17 kW 60 HzVariants
COBRA DX 0650 A PLUSPumping speed 650 m³/h 50 Hz650 m³/h 60 HzUltimate pressure 0.1 mbarRated motor power 15 kW 50 Hz15 kW 60 HzVariants
COBRA NX 0650 APumping speed 650 m³/h 50 Hz650 m³/h 60 HzUltimate pressure 0.1 mbarRated motor power 12.5 kW 50 Hz15 kW 60 HzVariants
COBRA NX 0650 A ECOTORQUEPumping speed 650 m³/h 50 Hz650 m³/h 60 HzUltimate pressure 0.1 mbarRated motor power 15 kW 50 Hz15 kW 60 HzVariants
COBRA NF 0750 APumping speed 750 m³/h 50 Hz750 m³/h 60 HzUltimate pressure 0.05 mbarRated motor power 15 kW 50 Hz15 kW 60 HzVariants
COBRA NC 1000 BPumping speed 840 m³/h 50 Hz1,000 m³/h 60 HzUltimate pressure 0.05 mbarRated motor power 22 kW 50 Hz25 kW 60 HzVariants
COBRA DX 0950 A PLUSPumping speed 950 m³/h 50 Hz950 m³/h 60 HzUltimate pressure 0.01 mbarRated motor power 18.5 kW 50 Hz18.5 kW 60 HzVariants
COBRA NF 0950 APumping speed 950 m³/h 50 Hz950 m³/h 60 HzUltimate pressure 0.01 mbarRated motor power 18.5 kW 50 Hz18.5 kW 60 HzVariants
COBRA NX 0950 A ECOTORQUEPumping speed 950 m³/h 50 Hz950 m³/h 60 HzUltimate pressure 0.01 mbarRated motor power 18.5 kW 50 Hz18.5 kW 60 HzVariants
COBRA NC 1500 B VRPumping speed 1,160 m³/h 50 Hz1,400 m³/h 60 HzUltimate pressure 20 mbarRated motor power 30 kW 50 Hz36 kW 60 HzVariants
COBRA DX 2000 A PLUSPumping speed 1,900 m³/h 50 Hz1,900 m³/h 60 HzUltimate pressure 0.01 mbarRated motor power 37 kW 50 Hz37 kW 60 HzVariants
COBRA NC 2500 CPumping speed 2,000 m³/h 50 Hz2,500 m³/h 60 HzUltimate pressure 1 mbarRated motor power 55 kW 50 Hz63 kW 60 HzVariants
COBRA NC 2000 C VRPumping speed 2,100 m³/h 50 Hz2,600 m³/h 60 HzUltimate pressure 20 mbarRated motor power 55 kW 50 Hz63 kW 60 HzVariants
COBRA DH 2760 APumping speed 2,112 m³/h 50 Hz2,112 m³/h 60 HzUltimate pressure 1 × 10-3 mbarRated motor power 22.5 kW 50 Hz22.5 kW 60 HzVariants
COBRA DH 2780 APumping speed 2,250 m³/h 50 Hz2,250 m³/h 60 HzUltimate pressure 1 × 10-3 mbarRated motor power 26 kW 50 Hz26 kW 60 HzVariants
COBRA DH 4560 APumping speed 3,077 m³/h 50 Hz3,077 m³/h 60 HzUltimate pressure 1 × 10-3 mbarRated motor power 22.5 kW 50 Hz22.5 kW 60 HzVariants
COBRA DH 4580 APumping speed 3,512 m³/h 50 Hz3,512 m³/h 60 HzUltimate pressure 1 × 10-3 mbarRated motor power 26 kW 50 Hz26 kW 60 HzVariants
COBRA DH 6260 APumping speed 3,781 m³/h 50 Hz3,781 m³/h 60 HzUltimate pressure 1 × 10-3 mbarRated motor power 22.5 kW 50 Hz22.5 kW 60 HzVariants
COBRA DH 6280 APumping speed 4,652 m³/h 50 Hz4,652 m³/h 60 HzUltimate pressure 1 × 10-3 mbarRated motor power 26 kW 50 Hz26 kW 60 HzVariants

COBRA Semicon series 22 models

COBRA DS 0080 GPumping speed 70 m³/h 50 Hz85 m³/h 60 HzUltimate pressure 0.03 mbarRated motor power 4 kW 50 Hz4.4 kW 60 HzVariants 2
COBRA BA 0100 CPumping speed 85 m³/h 50 Hz105 m³/h 60 HzUltimate pressure 0.01 mbarRated motor power 1.5 kW 50 Hz1.8 kW 60 HzVariants 3
COBRA BC 0101 GPumping speed 90 m³/h 50 Hz90 m³/h 60 HzUltimate pressure 0.01 mbarRated motor power 1.5 kW 50 Hz1.5 kW 60 HzVariants 1
COBRA DS 0160 GPumping speed 140 m³/h 50 Hz160 m³/h 60 HzUltimate pressure 0.03 mbarRated motor power 5.5 kW 50 Hz6.6 kW 60 HzVariants 3
COBRA DS 0700 GPumping speed 500 m³/h 50 Hz610 m³/h 60 HzUltimate pressure 3 × 10-3 mbarRated motor power 8 kW 50 Hz8.8 kW 60 HzVariants 2
COBRA BC 0601 GPumping speed 550 m³/h 50 Hz640 m³/h 60 HzUltimate pressure 3 × 10-3 mbarRated motor power 3 kW 50 Hz3.3 kW 60 HzVariants 1
COBRA DS 0600 EPumping speed 600 m³/h 50 Hz600 m³/h 60 HzUltimate pressure 0.01 mbarRated motor power 15 kW 50 Hz15 kW 60 HzVariants 2
COBRA DS 1000 GPumping speed 775 m³/h 50 Hz960 m³/h 60 HzUltimate pressure 3 × 10-3 mbarRated motor power 8 kW 50 Hz8.8 kW 60 HzVariants 2
COBRA BC 1001 GPumping speed 870 m³/h 50 Hz870 m³/h 60 HzUltimate pressure 3 × 10-3 mbarRated motor power 4.4 kW 50 Hz4.4 kW 60 HzVariants 1
COBRA BC 1200 APumping speed 1,200 m³/h 50 Hz1,200 m³/h 60 HzUltimate pressure 3 × 10-3 mbarRated motor power 5.5 kW 50 Hz5.5 kW 60 HzVariants 1
COBRA DS 1200 APumping speed 1,200 m³/h 50 Hz1,200 m³/h 60 HzUltimate pressure 3 × 10-3 mbarRated motor power 8 kW 50 Hz8.4 kW 60 HzVariants 2
COBRA DS 2000 GPumping speed 1,365 m³/h 50 Hz1,640 m³/h 60 HzUltimate pressure 3 × 10-3 mbarRated motor power 11 kW 50 Hz13.2 kW 60 HzVariants 2
COBRA DS 1800 APumping speed 1,700 m³/h 50 Hz1,700 m³/h 60 HzUltimate pressure 3 × 10-3 mbarRated motor power 8.4 kW 50 Hz8.4 kW 60 HzVariants 1
COBRA DS 1800 A XPumping speed 1,700 m³/h 50 Hz1,700 m³/h 60 HzUltimate pressure 3 × 10-3 mbarRated motor power 10.6 kW 50 Hz10.6 kW 60 HzVariants 1
COBRA DS 3010 GPumping speed 3,200 m³/h 50 Hz3,200 m³/h 60 HzUltimate pressure 1 × 10-3 mbarRated motor power 30 kW 50 Hz30 kW 60 HzVariants 1
COBRA DS 3161 CPumping speed 3,200 m³/h 50 Hz3,200 m³/h 60 HzUltimate pressure 1 × 10-3 mbarRated motor power 30 kW 50 Hz30 kW 60 HzVariants 1
COBRA DS 3181 CPumping speed 3,500 m³/h 50 Hz3,500 m³/h 60 HzUltimate pressure 1 × 10-3 mbarRated motor power 33.5 kW 50 Hz33.5 kW 60 HzVariants
COBRA DS 5161 BPumping speed 4,300 m³/h 50 Hz4,300 m³/h 60 HzUltimate pressure 1 × 10-3 mbarRated motor power 30 kW 50 Hz30 kW 60 HzVariants
COBRA DS 8161 FPumping speed 6,000 m³/h 50 Hz6,000 m³/h 60 HzUltimate pressure 1 × 10-3 mbarRated motor power 30 kW 50 Hz30 kW 60 HzVariants 1
COBRA DS 9161 BPumping speed 6,220 m³/h 50 Hz6,220 m³/h 60 HzUltimate pressure 1 × 10-3 mbarRated motor power 35 kW 50 Hz35 kW 60 HzVariants
COBRA DS 8162 FPumping speed 7,200 m³/h 50 Hz7,200 m³/h 60 HzUltimate pressure 1 × 10-3 mbarRated motor power 50 kW 50 Hz50 kW 60 HzVariants
COBRA DS 8163 BPumping speed 7,385 m³/h 50 Hz7,385 m³/h 60 HzUltimate pressure 1 × 10-3 mbarRated motor power 65 kW 50 Hz65 kW 60 HzVariants

Model comparison

About the series

Features and benefits of the COBRA series

The series at a glance

The uniform temperature distribution and the high efficiency reduce the thermal load and ensure high corrosion resistance, a long service life and reliable operation.

The COBRA NC series is available in various application-specific versions and offers high efficiency, robustness, flexibility and low operating costs. Depending on the model, ATEX-certified variants are also available.

With the COBRA series, Busch offers a powerful range of dry-running screw vacuum pumps developed for high process reliability, clean operation and reliable performance. The contact-free screw technology allows oil-free vacuum generation and a low maintenance effort. Thanks to its robust design and efficient dry-running technology, the COBRA series is a durable and reliable solution for demanding industrial vacuum applications.

Dry and oil-free

The Busch COBRA series uses dry-running screw technology and allows completely oil-free vacuum generation. The conveyed medium therefore remains free of oil contamination.

High process reliability

The contact-free screw principle ensures reliable vacuum generation and is particularly suitable for demanding processes with high demands on cleanliness and operational reliability.

Robust and durable

The robust design is intended for continuous industrial operation. The contact-free screw rotors reduce mechanical wear and support a long service life.

Operating principle

The Busch COBRA series works according to the principle of dry-running screw vacuum technology. Two counter-rotating screw rotors move inside the pump housing without contact and continuously convey the gas drawn in through the compression stages. In the process, the gas is compressed step by step and then expelled through the outlet.

As the COBRA series operates dry and oil-free, the conveyed medium does not come into contact with oil or lubricants in the compression chamber. The technology thus allows clean, contamination-free vacuum generation and is particularly suitable for demanding industrial processes.

The robust design and the contact-free screw principle allow reliable, durable and low-maintenance operation. Depending on the series, the COBRA pumps are designed for different process conditions and applications and offer high operational reliability even in continuous use.

The COBRA series is suitable for numerous industrial applications that require dry, oil-free vacuum, high reliability, powerful vacuum generation and low maintenance effort.

The technology page shows the operating principle with an interactive drawing: Screw vacuum pumps.

Standard operating conditions and performance

  • Ambient temperature: −20 to +40 °C, depending on model and version
  • Designed for dry, oil-free industrial vacuum applications

Frequently asked questions

Questions about the Busch COBRA series

Which models does the Busch COBRA series comprise?
The Ehrler & Beck catalogue lists 58 models of the series. The product overview names each model with its key figures and the number of its variants; the model page shows the technical data.
Which pumping speeds does the series cover?
At 50 Hz the models cover pumping speeds from 70 to 7,385 m³/h. The figure comes from the product data of the individual models; values for 60 Hz, where available, are given in the product overview.
What ultimate pressure do the models of the series reach?
Depending on the model, the ultimate pressure lies between 1 × 10⁻³ and 25 mbar. The figures on the page of the respective model are decisive.
How does the technology of the series work?
The series belongs to the field of screw vacuum pumps. The technology page explains the operating principle with an interactive drawing and names all series of this technology.
Does Ehrler & Beck supply spare parts and service for the Busch COBRA series?
Yes. Ehrler & Beck supplies the models of the series as well as spare parts and accessories and takes care of maintenance and repair. For a quotation, an enquiry with the model or part number is all it takes.

Which model fits your process?

Tell us the gas to be conveyed, the working pressure and the flow rate you need – we will advise you on selection, spare parts and service.

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