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FLOW SELECTION VALVES GENERAL INFORMATION
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Why Choose a Flow Selection Valve and Common Applications
040T Series Flow Selection Valves
Valves with 0.032” [0.81mm] and 0.054” [1.4mm] orifices and
1.9Watt solenoids
080T Series Flow Selection Valves
Valves with 0.032” [0.81mm] and 0.062” [1.6mm] orifices and
2.6Watt solenoids
105T Series Flow Selection Valves
Valves with 0.125” [3.2mm] orifices and 8.0Watt solenoids
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Flow Selection Valve Selection Guide
Flow Selection Valve General Information
What is a Flow Selection Valve?
Bio-Chem Valve ™ Flow Selection Valves combine multiple valve
actuators into a single, compact unit. Because each actuator
operates independently, Flow Selection Valves can combine or
select any combination of between 2 and 8 individual source
streams. Valves are situated around a central block, providing flow
paths of equal length.
Flow Selection Valves are similar in construction to Bio-Chem Valve™
solenoid operated Isolation Valves. A flexible diaphragm isolates
the solenoid actuation mechanism from the fluid path. When a valve
is energized, the solenoid retracts the armature that is attached to
the flexible diaphragm. This raises the diaphragm allowing fluid to
flow between the common port and an outlet. When de-energized
a spring forces the diaphragm down, closing off the flow path.
Because the fluid path can be made from extremely inert materials
(such as PTFE and PEEK), Bio-Chem Valve ™ Flow Selection Valves are
particularly suitable for use in highly aggressive and / or high purity
fluid applications.
Features of a Bio-ChemValve™ Flow Selection Valve.
•
Range of orifice sizes and power ratings.
The Bio-Chem
Valve™ Flow Selection Valve range covers orifice sizes from
0.032” (0.8mm) to 0.125” (3.2mm) with solenoids rated from
less than 2 Watts to 8 Watts in continuous operation. This
range means that standard valves can handle many mixing
and flow selection applications.
•
Precise flow characteristics.
Each solenoid actuator on the
Flow Selection Valve is individually adjusted at the factory to
ensure equal flow rates at the same pressure.
•
Compact, robust construction.
Combining 2, 3, 4, 5, 6 or 8
valves into one manifold block saves significant space within
an instrument. The integral construction eliminates the need
for tubing sets between valves.
•
Minimal dead volume.
The manifold is specifically designed
to reduce the internal volume of the valve leading to minimal
dead volume when compared to single, stand-alone valves
or compared to manifolds with removable valves. The
elimination of tubing sets further reduces the total internal
volume of the system.
•
Equal length flow paths.
The radial layout of the manifold
block ensures that all flow paths are identical. There are no
differences in flow path length and timing as would be found
in linear manifolds.
•
Inert fluid path.
Bio-Chem Valve™ Flow Selection Valves
employ the same method of construction as the range of
Isolation Valves. All wetted parts are manufactured from
inert, non-metallic materials.
Spring
Solenoid
Armature
Diaphragm
Common
port
Inlet / outlet
Body block
4 port Flow Selection
Valve (1 common port,
4 inlets/outlets)