Month: November 2008

  • Pneumatic pinch valve, 1/2″ version

    After successful testing of my prototype pneumatic pinch valve with a 3/8″ bore, I proceeded to design an improved version with a full 1/2″ bore. This version uses silicone tubing instead of latex, which I believe will not contribute any off-flavours, and will not break down eventually as latex tubing is prone to do. In…

  • Pneumatic pinch valve

    In a previous post, I wrote about an experiment at building a solenoid pinch-valve, as an inexpensive alternative to the exorbitantly-priced solenoid valves commonly used in automated homebrewing systems. That attempt was a failure, not even able to seal against 5psi pressure. I have since attempted another approach: a pneumatic pinch valve. The idea here…