Bio-Chem Fluidics Electric Rotary Valves are typically used in one of two main applications; port selection applications where one stream is diverted to one of either 4 or 6 different places, and loop injection applications where the valve can be used to load and inject fluids into a sample loop in two discrete steps.
Port selection
Bio-Chem Fluidics 4-way and 6-way selection / distribution valves allow for accurate and repeatable flow re-direction. One input can be diverted to any one of 6* outlets, or, 6* separate inputs can be diverted to one common outlet. (*Note: 4-way valves have 4 possible outlets / inputs).
Loop injection
Bio-Chem Fluidics 4 port and 6 port switching valves are commonly used as sample injection devices for chromatography systems. This application is comprised of two distinct operations: Load and Inject.
Step 1 – the sample can be loaded into the sample loop while the mobile phase is pumped directly through to the column.
Step 2 – when the valve switches to the inject position, the pump connects to the sample loop and the sample is carried onto and through the column. The “sample in” and “waste” ports are joined but are isolated from the loop.
Refer to Electric Rotary Valve page at our main site for more details. Download the full brochure here.
Posted by John Tully