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Article No.: EWA04
Articlename: AZURA Valve Unifier VU 4.1 for ASM 2.2L

Universal valve drive for ASM 2.2L

Valve drive VU 4.1 - EWA04

The valve drive AZURA® Valve Unifier VU 4.1 enables automatic valve switching. Due to its low switching time, the flow path is interrupted only for a very short time, and the pressure peaks are reduced to a minimum. The valve drive can be operated with software as well with an optional touch display (Mobile Control) or via LAN. Valves are identified via innovative RFID technology, which guarantees an easy valve exchange of KNAUER valves with RFID technology. This RFID technology enables to read GLP data, for example the maintenance of the rotor seal exchange is simplified by automatic notifications. EWA04 is the article number for a module integrated in the assistant. To order the device separately use AWA04.


Key Features

Technical Data

Valve details

Function Bypass, Column selection, Eluent selection, Fraction collection, Injection, Reverse flow, Sample selection


Interfaces LAN connection of ASM 2.2L
Control Software, Mobile Control
Inputs automatic valve recognition by RFID technology


Power supply via ASM 2.2L, DC 24V, 65 W
Dimensions 112 x 132 x 224 mm (WxHxD)
Weight 2 kg
Leak sensor via ASM 2.2L
Ambient conditions Temperature range: 4–40 °C; 39.2–104 °F; below 90 % humidity (non condensing)
Note EWA04 is the article number for a module integrated in the assistant. To order the device separately use AWA04.

Documents and more information

Certified Quality 

KNAUER is known for the quality of its products and has been certified several times. We produce high-tech laboratory instruments for research, routine analysis and production.
See all Quality certificates

In addition, we have extended documentation about all our products, including CE Declarations of Conformity.
See all CE Declarations of conformity

Innovation and quality - since 1962. Made in Germany.

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