In many industries, environmental engineering and research, high-performance, durable and reliable diaphragm vacuum pumps are widely sought whether for evacuating, transferring or compressing functions. Also when processes use explosive media. Therefore KNF has developed the explosion-proof pump series N 922 Ex with modified PTFE or stainless steel pump heads, making this pump series suitable for a wide range of applications.
Features & Benefits
What makes each version of the N 922 Ex pump series stand out and how they differ from each other? Here are the advantages:
PTFE Pump Head
PTFE Pump Head, integrated Bypass Valve
Stainless Steel Pump Head
- High chemical resistance
- Robust design
- Easy to sercive – wearing parts are inexpensively to replace
- Maintenance work can be easily carried out even on assembled analytical systems
- Durable even with difficult operating conditions
- Motor approved in accordance with ATEX/IECEx
- Explosion protection pump parts: Ex II 2G Ex h IIB+H2 T3 Gb
- Explosion protection capacitor motor: Ex II 2G Ex de IIC T4
- High chemical resistance
- Robust design
- Easy to sercive – wearing parts are inexpensively to replace
- Maintenance work can be easily carried out even on assembled analytical systems
- Durable even with difficult operating conditions
- Motor approved in accordance with ATEX/IECEx
- Explosion protection pump parts: Ex II 2G Ex h IIB+H2 T3 Gb
- Explosion protection capacitor motor: Ex II 2G Ex de IIC T4
- Motor approved in accordance with ATEX/IECEx
- High level of gas tightness: 6 x 10-3 mbar x l/s according to type examination
- Durable even with difficult operating conditions
- Compressor housing can be turned in 90° intervals as required
- Explosion protection pump parts: Ex II 2/2G Ex h IIB+H2 T3 Gb
- Explosion protection motor: Ex II 2G Ex de IIC T4
Possible Areas of Use
Consistently accurate results are essential in process gas measurement technology and in analytical measuring devices used for environmental protection and facility management. Their meticulously designed components make KNF pumps ideal for these demanding applications.
Read more about KNF pumps in industrial processes hereThe Right Fit for Your Need
The N 922 Ex is available as PTFE version with integrated AC supply or with adjustable flow and integrated AC supply, as well as stainless steel version with integrated AC supply.
Familiarize yourself with the technical details of our N 922 Ex explosion-proof pump series:
PTFE Pump Head
PTFE Pump Head, integrated Bypass Valve
Stainless Steel Pump Head
Flow Rate (max.): 18 l/min
Operating Pressure (max.): 1.5 bar (rel.)
Ultimate Vacuum (max.): 200 mbar (abs.)
Flow Rate (max.): 18 l/min
Operating Pressure (max.): 1.5 bar (rel.)
Ultimate Vacuum (max.): 200 mbar (abs.)
Flow Rate (max.): 23 l/min
Operating Pressure (max.): 6 bar (rel.)
Ultimate Vacuum (max.): 2.5 mbar (abs.)
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 922 Ex explosion-proof pump series can be customized by our modular system:
▪ Stainless steel
▪ Stainless steel
▪ Capacitor motor with 100 V, 50/60 Hz
▪ Capacitor motor with 220 V, 60 Hz
▪ Capacitor motor with 230 V, 60 Hz
▪ Three-phase motor with 230/400 V, 50/60 Hz
Learn More About our Non-Ex Versions
Familiarize yourself with the N 922 non-Ex pump series
Get all information hereKNF 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.