Pinch Valve
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Published on December 18, 2012
Description
Valve for obstructing fluid flow without making contact with the fluid itself. This type of valve is typically used in bioprocessing, medical equipment and in the food industry.
Instructions
This design uses a GS-D9025 micro servo that has been modified for full rotation and DC drive.
1) Print the 5 parts.
2) Attach the part "pv_a" to the servo.
3) Mount a M8 hex head bolt in part "pv_a" and attach the retainer ring ("pv_d") using acetone glue.
4) Mount a M8 hex nut inside "pv_c" and attach the retainer ring ("pv_e") with acetone glue.
5) Mount the servo+pv_a/d/c/e assembly in part "pv_b" (ps. it's a tight squeeze :)).
6) Fasten the servo to "pv_b" with screws.
7) (Optionally) attach limit switches. The design uses standard arcade-style switches.
Hook up the servo and switches to your microcontroller and driver circuitry of choice, Insert a tube between the "pointy bits" - and pinch away !
I have uploaded a video to YouTube that demonstrates the operation of the valve (http://www.youtube.com/watch?v=mUHaso6QWVU)
1) Print the 5 parts.
2) Attach the part "pv_a" to the servo.
3) Mount a M8 hex head bolt in part "pv_a" and attach the retainer ring ("pv_d") using acetone glue.
4) Mount a M8 hex nut inside "pv_c" and attach the retainer ring ("pv_e") with acetone glue.
5) Mount the servo+pv_a/d/c/e assembly in part "pv_b" (ps. it's a tight squeeze :)).
6) Fasten the servo to "pv_b" with screws.
7) (Optionally) attach limit switches. The design uses standard arcade-style switches.
Hook up the servo and switches to your microcontroller and driver circuitry of choice, Insert a tube between the "pointy bits" - and pinch away !
I have uploaded a video to YouTube that demonstrates the operation of the valve (http://www.youtube.com/watch?v=mUHaso6QWVU)
License
Pinch Valve by hansj66 is licensed under the Attribution - Non-Commercial - Creative Commons license.
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