Used KNF UN840.3

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

34L/min

Ultimate vacuum

6 mbar

Operating pressure

15 psig

Connectors for tube

3/8 in

Permissible media and ambient temperature

+5 … +40 °C