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You are at > Pinch Valves

What is a Pinch Valve?

The Bio-Chem Valve™ Solenoid Operated Pinch Valve allows flow passage through a flexible tube which is "pinched" off to produce a tight seal. Only the easily replaceable tubing comes into contact with the fluid making this style of valve ideal for applications requiring frequent changes of the flow path (read more on pinch valve operation).

Pinch Valves 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.
Tubing is soft yet durable. Pinch valves are highly tolerant of particulates in the fluid stream.
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.

(Download brochure – Solenoid Operated Pinch Valves).

Features of the Bio-Chem Valve™ Pinch Valve:

12 volt or 24 volt DC solenoid
Choice of valve function

2 way normally closed
2 way normally open
3 way
Dual tubing 2 way
Dual tubing 3-way
Multi-tube (currently unavailable via online store, please contact us)

Contoured body Most Bio-Chem Valve™ Pinch Valves incorporate a contoured body which features a smooth profile and enhanced aesthetics.
Choice of tubing materials Silicone Select™ and Bio-Chem (C-Flex) tubing (currently only valves with Silicone Select are available via online store, please contact us for C-Flex tubing). Download material data sheets for Silicone Select™ and Bio-Chem (C-Flex) tubing.
Quiet operation (optional, read more in brochure- Solenoid Operated Pinch Valves)
Feedback sensor (optional, read more in brochure- Solenoid Operated Pinch Valves)

Customization Services. We offer customized solutions on our solenoid operated pinch valves to meet equipment makers’ precise specifications. Refer to our Customization page for more details.

2-way Normally Closed. Note: xx in part number refers to voltage either 12V or 24V (grayed out items not available online - please contact us for more details)

Valve style	Tubing size	Tubing dims	Power
075P2NCxx-01S	-01S	1/32" ID x 3/32" OD	2.9W
075P2NCxx-02S	-02S	1/16" ID x 1/8" OD	2.9W
100P2NCxx-02S	-02S	1/16" ID x 1/8" OD	4.0W
100P2NCxx-03S	-03S	1/16" ID x 3/16" OD	4.0W
100P2NCxx-05S	-05S	1/8" ID x 1/4" OD	4.0W
075P2NCxx-10S	-10S	0.010" ID x 0.093" OD	2.9W
075P2NCxx-23S	-23S	0.023" ID x 0.093" OD	2.9W
075P2NCxx-50S	-50S	0.050" ID x 0.134" OD	3.6W
100P2NCxx-01S	-01S	1/32" ID x 3/32" OD	4.0W

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2-way Normally Open Note: xx in part number refers to voltage either 12V or 24V (grayed out items not available online - please contact us for more details)

Valve style	Tubing size	Tubing dims	Power
075P2NOxx-01S	-01S	1/32" ID x 3/32" OD	2.9W
075P2NOxx-02S	-02S	1/16" ID x 1/8" OD	2.9W
100P2NOxx-02S	-02S	1/16" ID x 1/8" OD	4.0W
100P2NOxx-03S	-03S	1/16" ID x 3/16" OD	4.0W
100P2NOxx-05S	-05S	1/8" ID x 1/4" OD	4.0W
075P2NOxx-10S	-10S	0.010" ID x 0.093" OD	2.9W
075P2NOxx-23S	-23S	0.023" ID x 0.093" OD	2.9W
075P2NOxx-50S	-50S	0.050" ID x 0.134" OD	3.6W
100P2NOxx-01S	-01S	1/32" ID x 3/32" OD	4.0W

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3-way Note: xx in part number refers to voltage either 12V or 24V (grayed out items not available online - please contact us for more details)

Valve style	Tubing size	Tubing dims	Power
075P3MPxx-01S	-01S	1/32" ID x 3/32" OD	3.6W
075P3MPxx-02S	-02S	1/16" ID x 1/8" OD	3.6W
100P3MPxx-01S	-01S	1/32" ID x 3/32" OD	4.0W
100P3MPxx-02S	-02S	1/16" ID x 1/8" OD	4.0W
100P3MPxx-05S	-05S	1/8" ID x 1/4" OD	8.1W
075P3MPxx-23S	-23S	0.023" ID x 0.093" OD	2.9W
075P3MPxx-50S	-50S	0.050" ID x 0.134" OD	3.6W

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Dual 2-way Normally Closed Note: xx in part number refers to voltage either 12V or 24V (Dual 2-way Normally Open are not available online - please contact us for more details)

Valve style	Tubing size	Tubing dims	Power
100PD2NCxx-01S	-01S	1/32" ID x 3/32" OD	4.0W
100PD2NCxx-02S	-02S	1/16" ID x 1/8" OD	3.6W

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Dual 3-way Note: xx in part number refers to voltage either 12V or 24V

Valve style	Tubing size	Tubing dims	Power
100PD3MPxx-01S	-01S	1/32" ID x 3/32" OD	4.0W
100PD3MPxx-02S	-02S	1/16" ID x 1/8" OD	3.6W

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Operation

isolation valve cross section
Bio-Chem Valve™ Pinch Valves are solenoid-operated devices and are available in three different configurations; normally closed, normally open and 3-way.

Bio-Chem Valve™ Pinch Valves are designed to open and close tubing to achieve controlled fluid flow. Only the inside of the tubing contacts the fluid. The tubing is held in place in the Pinch Valve by the plunger and precisely sized grooves in the valve body.

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 Pinch Valve has both a normally open and a normally closed flow path, which are operated simultaneously.

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