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Index
ELECTRIC ROTARY VALVES GENERAL INFORMATION
Page 6
RV-SN Series Electric Rotary Valves - valve with motor
PTFE/PCTFE rotary valve supplied with Trinamic stepper motor
Page 5
Page 4
RV-E Series Electric Rotary Valves
PTFE/PCTFE rotary valve head assembly (supplied without motor or PCB)
RV-SC Series Electric Rotary Valves - valve with motor and controller PCB
PTFE/PCTFE rotary valve supplied with Trinamic stepper motor and intelligent motor
controller
Page 3
Electric Rotary Valve Selection Guide
What is an Electric Rotary Valve?
The Bio-Chem Fluidics Electric Rotary Valve is a stepper motor
operated device used in sample collection, loop injection or flow
path selection applications. It is designed to provide an inert flow
path for aggressive and/or reactive fluids. The inert path is achieved
by aligning holes in a PCTFE rotor with holes in the PTFE valve body
(stator).
The rotor is pressed into the valve body creating a tight interference
fit seal. The rotor is turned by a close-coupled two-phase hybrid
stepper motor. An optoelectronic position sensor inside the valve
provides the position of the rotor to a controller PCB. The PCB makes
fine adjustments as necessary to provide an uninterrupted path.
The end-user can program the valve controller to perform desired
position sequences - the rotor can move clockwise or counter-
clockwise to the desired port position. (
The Bio-Chem Fluidics Electric Rotary Valve
can also be supplied without the motor and controller - refer to page 4 for more details
).
Polymers referenced in this brochure:
PCTFE = polychlorotrifluoroethylene
PTFE = polytetrafluoroethylene
Features of a Bio-Chem Fluidics Electric Rotary Valve
•
Inert fluid path
- the fluid in the valve is in contact with only
two components; the PTFE valve body and the PCTFE rotor.
This ensures a completely non-metallic, corrosion-resistant
path and means that the non-contact parts can be sourced
economically from industry standard components.
•
Multiple flow configurations
- the Bio-Chem Fluidics Electric
Rotary Valve is available in five
different flow configurations (see
page 3 for more details) which
means that the most appropriate
design for your application
can be selected from standard
configurations.
•
Unobstructed flow path
-
careful and precise machining
results in an unobstructed flow
path through the valve ensuring
minimized dead volumes and
providing a lower pressure drop
than conventional solenoid
mixing valves.
•
Industry standard stepper
motor
- Bio-Chem Fluidics
Electric Rotary Valves utilize Trinamic® QMOT stepper motors
and PANdrive motor controllers.
•
OEM focused
- the RV series Electric Rotary Valve is
designed specifically with OEM customers in mind. The flow
configurations match the most commonly found applications
and the 1/4”-28 UNF fluid port connections allow easy
integration into sophisticated systems.
ROTOR
BODY