The Bio-Chem Fluidics Electric Rotary Valve is a stepper motor operated fluid handling valve.  The Electric Rotary Valve provides an inert flow path for aggressive fluids. The inert path is achieved by aligning holes in a PCTFE rotor with holes in the PTFE body. (Download brochure – Electric Rotary Valves). (Download User Manual).

Features of the Electric Rotary Valve:

• Inert fluid path - the fluid in the Electric Rotary Valve contacts only two components; the PTFE valve body and the PCTFE rotor. This ensures a completely non-metallic, corrosion-resistant path.
• Multiple flow configurations - the Electric Rotary Valve is available in five different flow configurations (see below).
• Unobstructed flow path - precise machining creates an unobstructed flow path through the Electric Rotary Valve minimizing dead volumes and providing a lower pressure drop than solenoid mixing valves
• OEM focused – the Electric Rotary Valve is available with and without the NEMA 17 stepper motor and controller board.  (Read more – download brochure, Electric Rotary Valves).

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 injected into the sample loop while the mobile phase is pumped directly through to the column.

Step 2 - when the valve is switched to the inject position, the pump is then connected 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.