Hydraulic Valve Cutaway Example
Description
Rudimentary hydraulic directional control valve example, created for Hydraulic Training as an alternative to $1100 professional cutaway valves. This model is a 3-position, 4-way, Open-Center, Directional Control Valve, with spring return-to-center. - At center, the P (Pump) port connects to both the A & B (Work) ports. - Right movement connects P to the A port. B port dumps to T (Tank) - Left movement connects P to the B port. A port dumps to (T) (Tank) Employs two small compression springs from Harbor Freight to center the spool. Spool printed vertically, body printed flat. Approximately 10-hour print time with Cura 3.6 at .15mm Z resolution, 40mm/sec speed. Usually you can rotate the spool in the body to find a loose fit that slides freely. If not, the spool may need some light sanding after printing to slide freely. Springs are ~7.5mm ID, and should fit over the 7mm end nubs to prevent them zinging-off. I do not recommend paint for the parts. It ruins the clearances and the parts don't slide easily. If you need different colors, print in WHITE, then use colored sharpies to color-in the ways. Open Center Directional Spool Valve Model Rev 1.0 Disclaimer: I am a novice CAD designer using Blender.
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