KNF developed its first Ex pump series in the 1970s, the N 143 Ex and N 186 Ex. Both have been replaced by the N 630 Ex series, which offers impressive performance and a range of useful features.

Features & Benefits

These are the main advantages of the N 630 Ex explosion-proof pump series:

  • High chemical resistance
  • Durable even with difficult operating conditions
  • High level of gas tightness up to 5 x 10-5 mbar x l/s as a standard
  • N 630.15 Ex version: High level of gas tightness up to 6 x 10-3 mbar x l/s as a standard 
  • Flameproof motor with intrinsically safe terminal box for simple installation
  • Explosion protection three-phase motor: Ex II 2G Ex de IIC T4 Gb
  • Explosion protection pump parts: Ex II 2G Ex h IIB+H2 T3 Gb

Explosion Protection Designation

The N 630 Ex explosion-proof series pumps have the explosion protection designation Ex II 2/2G Ex h IIB+H2 T3 Gb:

  Ex

 

  Symbol for explosion-proof pumps   

 

-

 

  II

 

 

  Device group

 

 

Device group II applies for devices that are used in other areas that could be

endangered by an explosive atmosphere.

 

  2/2G

 

 

 

  Device category

 

 

 

Devices that extract from zone 1 and are designed for use in areas in which it is to

be expected that an explosive atmosphere consisting of gases, vapors or mists forms

occasionally.

 

  Ex

 

  Symbol 

 

Symbol indicates that the device complies with one or more ignition protection types

 

  h

 

 

 

  Symbol for ignition protection type   

 

 

 

An ignition hazard assessment in accordance with standards DIN EN ISO 80079-36 

and DIN EN ISO 80079-37 was performed for the pumps. The protective goals were

reached by applying ignition protection type constructional safety "c".

 

  IIB + H2      

  

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

   

  Explosion groups

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 T1T2T3

  I

 

Methane

 

-

 

-

 

  IIA

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Acetone

Ethane

Ethyl acetate

Ammonia

Ethyl chloride

Benzene

Acetic acid

Carbon monoxide           

Methane

Methanol

Methyl chloride

Naphthalene

Phenol

Propane

Toluene

 

i-amyl acetate

n-butane

n-butyl alcohol

Cyclohexanone

1,2-dichloroethane           

Acetic anhydride

 

 

 

 

 

 

 

 

 

 

Gasoline

Diesel fuel

Jet fuel

Heating oils

n-hexane

 

 

 

 

 

 

 

 

 

 

 

  IIB

 

 

Town gas                  

 

 

Ethylene

Ethyl alcohol                

 

Hydrogen sulfide            

 

 

  IICHydrogen--

  T3

 

 

  Temperature class

 

 

Max. surface temperature: 200 °C

Ignition temperature: > 200 °C

 

  Gb

 

 

  Equipment protection level

 

 

Devices with high protection level for use in potentially explosive areas in which there

is no risk of ignition during normal operation or in th event of foreseeable or infrequent

faults/malfunctions. Constructional safety: High.

 

The Right Fit for Your Need

The N 630 Ex is available with either one or two heads and a serial or parallel connecting system as a vacuum pump or compressor. All four versions are outfitted with PTFE-coated diaphragms as standard, while EPDM is also available. 

 

Familiarize yourself with the technical details of our N 630 Ex explosion-proof pump series:

N 630 Ex – One-headed Vacuum Pump and Compressor

­­Flow Rate (max.): 35 l/min

Operating Pressure (max.): 4 bar (rel.)

Ultimate Vacuum (max.): 120 mbar (abs.)

­

Get all technical details here

N 630.15 Ex – Two-headed Compressor with Series Connections

Flow Rate (max.): 35 l/min

Operating Pressure (max.): 9 bar (rel.)

Ultimate Vacuum (max.): 70 mbar (abs.)

­

Get all technical details here

N 630.3 Ex – Two-headed Vacuum Pump with Series Connections

Flow Rate (max.): 35 l/min

Operating Pressure (max.): 0.5 bar (rel.)

Ultimate Vacuum (max.): 25 mbar (abs.)

­

Get all technical details here

N 630.1.2 Ex – Two-headed Compressor with Parallel Connections

Flow Rate (max.): 68 l/min

Operating Pressure (max.): 4 bar (rel.)

Ultimate Vacuum (max.): 120 mbar (abs.)

­

Get all technical details here

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 Double-Diaphragm Version

Videos

KNF diaphragm pumps for process industries
Circular arrangement of various icons for pump services
Flexible Support from Start to Finish – your added value is our priority
KNF modular system exemplified by the N 816 diaphragm vacuum pump
Maintenance of the N 630 non-explosion-proof gas pump series
Show More

KNF Pumps: Reliable and Safe Where it Matters Most

From sample gas pumps for analyszing 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. 

 

Fore 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

Follow us on LinkedIn!

Join our community and get automatically updated with exciting news and stories about our products and company.
Let's connect!

KNF Tailored Solutions