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Screw Vacuum Pump

Screw Vacuum Pump

Product Code:NC 0100-0630 B


Need more Info? (514) 354-2511 - 1-800-463-4363

Description
COBRA NC are high efficiency dry screw vacuum pumps for many industrial applications including chemical and pharmaceutical processes. These models bring together many years of dry technology experience and offer key design benefits:
High suction capacity
between 1 hPa (mbar) and 100 hPa (mbar).
Reliable and robust
The asymmetrical screw profile and free gas outlet greatly improve the pumps ability to handle liquid and dust carry over. High corrosion resistance, is also incorporated, due to uniform temperature distribution. The optimised efficiency reduces the thermal load, thus increasing pump service life.
Easy to service
Simple, robust design and the ability to handle the vast majority of chemical gases ensures long service intervals and minimum maintenance downtime.
Application-oriented
Due to different standard versions. Water recirculation cooling or direct water cooling. COBRA NC screw vacuum pumps are available in different versions with ATEX certifications.

 

Principle of operation
COBRA NC vacuum pumps contain two screw rotors (3) which rotate inside a cylinder. Thereby, the gas is trapped between cylinder and screw chambers and carried to the gas discharge. There is no contact between the two screw rotors and there is no need for additional lubrication. Cooling is achieved by either a recirculating system without additional cooling water (4) or by a direct non-recirculating cooling system with external cooling water connection.

1. Gas inlet
2. Gas discharge
3. Screw type rotor
4. Cooling liquid

 

Technical data
Suction capacity
  COBRA
NC 0100 B
COBRA
NC 0200 B
COBRA
NC 0300 B
COBRA
NC 0400 B
COBRA
NC 0630 B
Nominal displacement 50 Hz m3/h 110 220 320 350 525
60 Hz m3/h 130 265 385 420 630
Ultimate pressure 50 Hz hPa (mbar) < 0,05 < 0,05 < 0,05 < 0,05 < 0,05
60 Hz hPa (mbar) < 0,01 < 0,01 < 0,01 < 0,01 < 0,01
Nominal motor rating 50 Hz kW 3,5 6,0 7,5 7,5 15
60 Hz kW 4,8 7,6 9,5 9,5 17
Nominal motor speed 50 Hz min-1 3000 3000 3000 3000 3000
60 Hz min-1 3600 3600 3600 3600 3600
Noise level*, direct cooling 50 Hz dB(A) 70 71 72 66 70
60 Hz dB(A) 74 76 77 69 75
Weight approx.   kg 235 290 315 460 550
* DIN ISO 2151

 

Screw vacuum pumps
COBRA NC screw vacuum pumps have standardised ATEX safety packages for different zones. For you, this means absolute safety of the vacuum pump, the process and your plant. These vacuum pumps can also be modified retroactively for use in another zone.

COBRA NC screw vacuum pumps are available in different versions with ATEX certifications. The temperature class depends on the relevant version.
ATEX certifications
ATEX-1/2
Certification according the regulation 94/9/EG:
Ex II 1(i)/2(o) G IIB3(i)/IIB(o)

ATEX-2/2
Certification according the regulation 94/9/EG:
Ex II 2(i)/2(o) G IIB(i)/IIB(o)

ATEX-3/3
Certification according the regulation 94/9/EG:
Ex II 3(i)/3(o) G IIB(i)/IIB(o)

 

Cooling Systems
1. COBRA NC 0300 B with radiator cooling 2. COBRA NC 0300 B with direct cooling system
COBRA NC screw vacuum pumps are available with two different cooling systems.

1. Radiator cooling with liquid coolant (standard)
The closed loop circuit works with liquid cooled by an air cooled heat exchanger. No external cooling water inlet device required.

2. Direct cooling system (option)
Once through cooling system with direct cooling by external cooling water. Various control systems on this basic cooling version guarantee a safe operation of the pump.

 

Screw vacuum pumps
Dimensions COBRA NC 0100 - 0300 B with radiator cooling
Dimensions mm A B C D E F G N Q R DN 1 DN 2
COBRA NC 0100 B 50 Hz 957 800 595 292 607 328 1110 250 125 315 DN 40* ø 40**
COBRA NC 0100 B 60 Hz 957 800 595 292 607 333 1115 250 125 315 DN 40* ø 40**
COBRA NC 0200 B 50 Hz 1207 1060 607 356 653 410 1243 262 324 297 DN 50* ø 50**
COBRA NC 0200 B 60 Hz 1207 1060 607 356 653 410 1243 262 324 297 DN 50* ø 50**
COBRA NC 0300 B 50 Hz 1279 1130 607 424 721 410 1311 262 328 297 DN 50* ø 50**
COBRA NC 0300 B 60 Hz 1279 1130 607 424 721 410 1311 262 328 297 DN 50* ø 50**
* PN 16, DIN 2576
Dimensions COBRA NC 0100 - 0300 B with direct cooling system
Dimensions mm A B C D E F G H I DN 1 DN 2 DN 3
COBRA NC 0100 B 50 Hz 900 800 595 292 607 328 1157 250 222 DN 40* ø 40** PN 10/DN 15
COBRA NC 0100 B 60 Hz 900 800 595 292 607 333 1162 250 222 DN 40* ø 40** PN 10/DN 15
COBRA NC 0200 B 50 Hz 1160 1060 607 356 653 410 1300 262 235 DN 50* ø 50** PN 10/DN 15
COBRA NC 0200 B 60 Hz 1160 1060 607 356 653 410 1300 262 235 DN 50* ø 50** PN 10/DN 15
COBRA NC 0300 B 50 Hz 1230 1130 607 424 721 410 1366 262 235 DN 50* ø 50** PN 10/DN 15
COBRA NC 0300 B 60 Hz 1230 1130 607 424 721 410 1366 262 235 DN 50* ø 50** PN 10/DN 15
* PN 16, DIN 2576
Dimensions COBRA NC 0400 B
Radiator cooling
Direct cooling system
* with magnetic coupling
Dimensions COBRA NC 0630 B
Radiator cooling
Direct cooling system

 

Accessories
  • Flushing connection the inlet side for flushing the working chamber with inert gas after processing explosive or toxic gases.
  • Sealing gas connection for the seals.
  • Dilution gas to allow an optimal running of the pump in certain applications.
  • Flame arrestors on the inlet side and on the pressure side for pumping down explosive media out of or into Zone 0.
  • Flange adapters for inlet side DIN/ISO flanges in order to get an easy connection to existing piping systems.
  • Non return flap with exhaust elbow to avoid any exhaust gas draw back.
  • Exhaust silencer with elbow for noise reduction.

 

Tags: Screw, Vacuum, Pump

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