Pneumatic Valve 3-ways 2-positions

thingiverse

Here are the steps to build this pneumatic distributor valve using a 3/2 configuration. It requires inserting a syringe body into the piston assembly, then adding four O-rings onto the sliding piece. Firstly, obtain a syringe with a diameter of approximately 20mm and measure its internal and external cylinder diameters using calipers. Insert these measurements into the OpenScad design file. Secondly, find four O-rings that fit snugly around the interior syringe body. Enter these measurements back into the OpenScad program. Lastly, print the required pieces in this sequence: 1) Use glue to secure two bearing washers and a center bearing washer onto the slider piece. Then add four O-rings to the assembly. 2) Cut off the end of a 20mm syringe, leaving a small cylinder remaining. Dip the cut-off cylinder in glue or silicone lubricant before placing it inside the syringe body. After it hardens, use a drill press to make the desired pathways on the inside of the piston piece. 3) Apply vaseline to the piston assembly so that the O-rings move smoothly along the interior of the syringe. 4) Close and seal with glue the top part of the assembly. 5) Take a 90-degree "T" fitting made from 1/8 inch PVC tubing. Split it into three parts, leaving enough space to create connectors for each end of the distributor valve. Attach the cut pieces onto either side of the body's mounting holes using strong glue or epoxy. Finally, connect a pressure gauge to the output line and add lubricant as needed to improve system efficiency. The resulting setup is ideal for use with low-flow control applications.