KNF UN840.3 FTP Diaphragm Vacuum Pump Unit

SKU: 3369490


1 in stock


The chemically-resistant series N 840 and N 840.3 diaphragm pumps are single- and double-head, dry-running devices used in a wide range of laboratory applications. They transfer and pump down without contamination. The heart of these very compact pumps is a KNF structured
diaphragm. This patented diaphragm was stress-optimized using the Finite Elements method. As a result, we were able to make the pumps smaller while increasing the service life of the diaphragm.

Technical Features:

• 100% oil-free transfer
• Pure transferring and evacuation of gases
• Highly compatible with vapors and condensation
• Chemically-resistant
• Suitable for highly aggressive or
corrosive gases and vapors
• Maintenance-free


Manufacture Specifications

Flow rate at atm. pressure


Ultimate vacuum

6 mbar

Operating pressure

15 psig

Connectors for tube

3/8 in

Permissible media and ambient temperature

+5 … +40 °C

Additional information

Weight 36 lbs
Dimensions 21 × 14 × 17 in
Make KNF
Model UN840.3 FTP
Serial 1/898291
Manufacturing Date 04/06
Working Working
Item Condition Used
Includes Power Cord
Warranty 30-Day Warranty, 100% Parts and Labor
Voltage 120V
hertz 60Hz
Shipping Type UPS Ground


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