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Index
PINCH VALVES GENERAL INFORMATION
Page 16
Page 18
Mounting Options
Optical Position Feedback Sensor & CoolCube™“Hit and Hold” Circuit
Pinch valve connector accessories
Page 6
100P Series Pinch Valves
For use with soft-walled tubing with inner diameters from
1/32”/0.8mm to 1/4”/6.4mm
108P Series Multi-Tubing Pinch Valves
For use with soft-walled tubing with inner diameters of
1/32”/0.8mm (simultaneous operation of 4, 6 or 8 tubes)
Page 13
Page 14
Page 15
Pinch Valve Applications
Prevention of shear, handling non-liquid effluents
Tubing for Bio-ChemValve™ Pinch Valves
Material selection information, tubing sizing selection charts
Page 5
Page 4
Features of the Bio-ChemValve™ Pinch Valve
Contoured body, choice of de-energized state, choice of tubing materials
Page 9
075P Series Pinch Valves
For use with soft-walled tubing with inner diameters from
0.010”/0.3mm to 1/16”/1.6mm
Page 3
Pinch Valve Selection Guide
What is a Pinch Valve?
The Bio-Chem Valve™ Pinch Valve is a solenoid-operated device. It is
designed to open and close tubing to achieve controlled fluid flow.
Only the inside of
the tubing contacts
the fluid. Energizing
the solenoid retracts
the valve plunger.
This either opens
the tubing (in the
normally closed
configuration, as
shown left) or closes
the tubing (normally
open configuration).
De-energizing the
solenoid allows a
spring to push the
plunger back to its
original position. This
returns the tubing
to its original closed
or open position.
A 3-way valve has
both a normally
open and a normally
closed flow path,
which are operated
simultaneously. The
tubing is held in place by the plunger and precisely sized grooves in
the valve body.
Why choose a Pinch Valve?
There are many reasons to use Bio-Chem Valve™ Pinch Valves (refer
to page 4 for more details) but pinch valves themselves have specific
features that lend themselves to particular applications:
•
Unobstructed flow path.
Pinch valves create minimal
pressure drop, which is important for controlling downstream
instrumentation. Unobstructed flow is also important when
handling fluids that might shear when forced to flow through
complex valve internals (for more details see page 4).
•
Tubing is soft yet durable.
Pinch valves are highly tolerant of
particulates in the fluid stream (for more details see page 4).
•
Tubing is easy to change.
The user can change tubes if a
sterile fluid path is required (for instance, blood collection)
or when chemicals create clogs (for instance, system waste
lines).
•
Zero dead volume.
Consecutive samples are not
contaminated by the previous one.
•
Fluid contacts tubing only.
The materials of construction
of the body and plunger do not have to be highly corrosion
resistant, which means pinch valves are often very
economical when compared to alternatives.
•
Simple.
Pinch valves do not require complicated electronic
controls - they are either energized or not. Pinch valves do
support the use of “Hit and Hold” circuits which significantly
reduce the power required to hold the valve in its energized
position (for more detail see the CoolCube™ on page 14).
Solenoid
Plunger
Body
Tubing
Spring
Armature