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Features of Bio-Chem Valve™ Pinch Valves
Contoured Body
Bio-Chem Valve™ Pinch Valves incorporate a contoured body which is designed to meet the market demand for better looking and easier to
use valves. The contoured body features a smooth profile and enhanced aesthetics with features that benefit not only instrument designers
but also the system end-user.
Choice of de-energized state
Bio-Chem Valve™ Pinch Valves are supplied in the following standard configurations:
•
2-way normally closed
•
2-way normally open
•
3-way (where one tube, or set of tubes, is normally open and the other normally closed. When the valve is energized the operation is
reversed so the normally open tube is closed and the normally closed tube is opened)
Dual tubing configurations (i.e. two tubes being operated simultaneously) are offered for smaller tubing sizes. Multi-tube pinch valves with
4, 6 or 8 tubes and normally open operation are also available.
Choice of tubing materials
Bio-Chem Fluidics offers two high-purity medical grade tubing materials for pinch valves:
•
Platinum cured silicone tubing
•
C-Flex® tubing
Bio-Chem Valve™ Pinch Valves can also be configured to use customer supplied tubing, within a recommended durometer range of 45-60
Shore A.
Easy tube insertion
The tubing entry area of the valve body is contoured to guide the tubing into its seat.
Tubing securely seated
Molded grooves hold the tubing securely in the proper position. The gap between the valve plunger
and the valve’s anvil is slightly smaller than the tubing’s outer diameter. The tubing is held in place
during operation without need for mechanical locking features. Fluid flow and pressure drop are
minimally affected, achieving approx. 95% of full flow given the nominal tubing inner diameter.
Continuous duty
Bio-Chem Valve™ Pinch Valves can remain in the fully energized state indefinitely without damage to
the valve or the tubing.
Low power consumption
The pinch valves’ efficient construction permits the use of low wattage solenoid coils, ranging from 2.8 Watt for 075-series valves to 8.1 Watt
for 100-series valves, which in turn minimizes heat generation. Both power usage and heat generation can be lowered further by stepping
down the voltage after actuation by using a CoolCube™ “Hit and Hold” circuit (refer to page 14 for more details).
2-way
Normally Closed
2-way
Normally Open
3-way
Valve body is contoured to aid tube
insertion. Grooved insert clearly
identifies the tubing size.