Even more secure with a double diaphragm: The versatile N 630 pump series upholds its excellent reputation. A total of six versions offer a major expansion to the diaphragm gas pump’s range of uses. The series’ key properties – robustness, durability and long service life – are now supplemented by a greater degree of safety.

Features & Benefits

These are the main advantages of the N 630 pump series with double diaphragm:

  • Maximum pressure up to 3 bar g.
  • Towards users who work with valuable and hazardous gases
  • Monitoring of the interstitial space by an external sensor possible
  • High level of gas tightness
  • Robust and durable design
  • Long service lifetime
  • Pump feet with rubber bonded metal in standard
  • Available as ex and non-ex version

Greater Degree of Safety Through Double Diaphragm

The pump series is continuously expanded to keep pace with the broad spectrum of applications. Six models with double diaphragms are geared toward users who work with valuable and hazardous gases. Even if the working diaphragm should crack, no gas will escape, thanks to the safety diaphragm installed underneath. All of the new models can be equipped with an external sensor so that customers can monitor the state of the working diaphragm.

Cross-section of a double diaphragm pump head of the N 630 pump series
Cross-section of a double diaphragm pump head of the N 630 pump series

Convincing Gas Tightness

Based on actual field data, pump gas tightness can be modified from the normal 5 × 10-5 mbar × l/sec to an increased 6 × 10-6 mbar × l/sec.

The high gas tightness of the N 630 is particularly well suited for transporting helium and its rare/costly isotopes. The N 630 with a double diaphragm securely transfers the uncontaminated noble gas for recycling. This pump is also particularly useful for cryostat applications, where it reliably compresses the helium cooling medium.

The Right Fit for Your Need: Availability in Ex and Non-Ex Versions

Different options are available for application-specific requirements. Users can choose between Ex and non-Ex versions of the double-diaphragm          N 630, each available in a single-head model or a model with two heads connected in parallel or in series. 

 

Familiarize yourself with the technical details of our N 630 double-diaphragm pump series:

One-headed Vacuum Pump and Compressor

The Ex and non-Ex version have the same performance parameters:

  • Flow rate of up to 35 l/min
  • Ultimate vacuum of 120 mbar abs.
  • Pressure of 3 bar g
  • Protection class of the pump is IP20
  • Protection class of the motor is IP55
  • Motor can be used at 50 or 60 Hz and is designed to be operated with a frequency inverter
N 630 Non-Ex version accordion-arrow

An optional water-cooling system can also be installed to handle ambient and media temperatures of up to 60 °C

 

Get all technical details here

N 630 Ex Version accordion-arrow

The pump has the following explosion protection designation:

Three-phase motor: Ex II 2G Ex de IIC T4 Gb

Pump parts: Ex II 2G Ex h IIB+H2 T3 Gb

 

Get all technical details here

Two-headed Vacuum Pump with Series Connections

The Ex and non-Ex version have the same performance parameters:

  • Flow rate of up to 35 l/min
  • Ultimate vacuum of 25 mbar abs.
  • Pressure of 0.5 bar g
  • Protection class of the pump is IP20
  • Protection class of the motor is IP55
  • Motor can be used at 50 or 60 Hz and is designed to be operated with a frequency inverter
N 630.3 Non-Ex Version accordion-arrow

An optional water-cooling system can also be installed to handle ambient and media temperatures of up to 60 °C

 

Get all technical details here

N 630.3 Ex Version accordion-arrow

The pump has the following explosion protection designation:

Three-phase motor: Ex II 2G Ex de IIC T4 Gb

Pump parts: Ex II 2G Ex h IIB+H2 T3 Gb

 

Get all technical details here

Two-headed Compressor with Parallel Connections

The Ex and non-Ex version have the same performance parameters:

  • Flow rate of up to 68 l/min
  • Ultimate vacuum of 120 mbar abs.
  • Pressure of 3 bar g
  • Protection class of the pump is IP20
  • Protection class of the motor is IP55
  • Motor can be used at 50 or 60 Hz and is designed to be operated with a frequency inverter
N 630.1.2 Non-Ex Version accordion-arrow

An optional water-cooling system can also be installed to handle ambient and media temperatures of up to 60 °C

 

Get all technical details here

N 630.1.2 Ex Version accordion-arrow

The pump has the following explosion protection designation:

Three-phase motor: Ex II 2G Ex de IIC T4 Gb

Pump parts: Ex II 2G Ex h IIB+H2 T3 Gb

 

Get all technical details here

Modular System Options

Every application is different and some are one of a kind. By selecting and combining a variety of options, ranging from the material used to make the pump components that come into contact with the media, to the drive and the mechanical elements such as the circuit point and connections, it is easy to tailor every series model to meet application-specific requirements.

The following pump parts of the N 630 double-diaphragm pump series can be customized by our modular system:

Pump head
Diaphragm
Valves
Motor
Safety Diaphragm
Pump head
▪  Stainless steel
Diaphragm
▪  PTFE-coated­
▪  EPDM
Valves
▪  Stainless steel­
Motor
▪  Three-phase motor with 230/400 V, 50 Hz
▪  Three-phase motor with 200/346 V, 50/60 Hz
▪  Three-phase motor with 220/380 V, 60 Hz
▪  Three-phase motor with 277/480 V, 60 Hz
▪  Capacitor motor with 230 V, 50 Hz
▪  Capacitor motor with 100 V, 50/60 Hz
▪  Capacitor motor with 220 V, 60 HZ
▪  Capacitor motor with 115 V, 60 Hz
Safety Diaphragm
▪  EPDM

Let Us Know Your Specifications!

We implement your specifications carefully and precisely. This means you get a diaphragm pump that meets the requirements of your process, your operating conditions and the properties of the process medium. We would also be happy to discuss options for providing out a sample pump.
Contact us

Learn More About our N 630 Pump Series as Non-Explosion-Proof and Explosion-Proof Version

Videos

This video shows how to service the N 630 double diaphragm pump.
Maintenance of the N 630 double diaphragm pump series
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Flexible support from start to finish – your added value is our priority
KNF modular system exemplified by the N 816 diaphragm vacuum pump
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KNF Pumps: Reliable and Safe Where it Matters Most

From sample gas pumps for analyzing process gases to emissions monitoring, the transfer of highly explosive media and the recovery of valuable gases, KNF's solutions are used wherever it is crucial for processing media to be handled with special care. When it comes to implementing KNF diaphragm pumps that are tailored precisely to your process and operating conditions, your specifications set the benchmark right down to the smallest detail. 

 

For more information about our most recent innovations for gas analysis, emission measurement and industrial processes, please feel free to have a look on our application page

KNF Modular System

Flexible, custom-fit, cost-effective – from standard to high-end

Every application is different and some are one of a kind. Our modular system is designed to give you a high degree of flexibility, speed and reliability. You can be sure that every gas and liquid pump supplied by KNF will exactly meet your requirements, no matter how complex or unusual these might be. 

Learn more

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