KNAUER AZURA® V 4.1 Injection Valves
Engineered for a wide range of chromatography and dosing applications.
Flow Rate Range
up to 1000 ml/min depending on bore size and capillary connection
Application Area
From analytical to prep with 1/16", 1/8", 1/4" connection
High Pressure Applications
DLC coated stainless steel stator
Biocompatibility
Wetted material PEEK, SSt-free
Port Number
6, 8, 10
AZURA® V 4.1 Injection Valves Mission
Many years of experience in valve technology result in KNAUER´s reliable and robust injection valves.
Flexibility is provided by choice of different materials and sizes. Find your suitable valve now!
View our brochure
Innovative Technology
Patented Breakfree technology for truely pressureless switching at any flow rate.
Operation Mode
Manual or automated via valve drive
Backpressure Range
up to 1200 bar/ 17400 psi
Adaptable Internal Volume
0.3 - 4.0 mm bore size
Special Solution for Ambitious Tasks
Multi-injection valves for switching between direct sample loading, syringe and pump injection
The right valve for sample injection
The injection of samples into the system is the most common application of switching valves. Whether operated manually by a lever or automated by an electric actuator, the valve in the injection position directs the fluid flow through a sample loop previously filled in the loading position. At the same time, the chromatography data system receives a signal about the switching. After this injection of the sample or completion of the chromatography run, the valve is switched back to the loading position and the sample loop can be filled with sample again.
The valve type usually used for this task is a 6-port 2-position valve (also referred to as 6-port 3-channel valve) such as our AZURA V 4.1 Ultra High Pressure Valve. The same valve can also be used to switch between two columns, if both have to be used frequently and a laborious column change is to be avoided.
For very special demands, also a special position valve can be applied. The unique design allows for multi-injection modes with only one valve.
Manual or automated?
With KNAUER AZURA® V 4.1 valves, the user decides how to inject the sample.
Manual Sample Injection Valves
Equipped with a lever, manual injection valves can be applied whenever highest sample throughput is not a task. Manual valves are shipped with a special injection port for manual syringes and easily be integrated in any HPLC or FPLC system.
Automated Sample Injection Valves
Automated valves are mounted on an AZURA® VU 4.1 Valve Unifier and controlled either via Chromatography software or the VU 4.1 display. The user chooses between manually filling the sample loop using a syringe or automatically filling the sample loop with an additional pump.
