Spool valve seals

[addax]

I am new to the forum and would very much appreciate some insight into the following issue:

I am designing a hydraulically activated 4/2 spool vlave that will work at relatively low pressures (10 bar max). The body will be injected plastic rather than traditional machined or cast metal. I realize this is a pneumatics forum but much of the technology is directly applicable. I have cut open a Festo valve and discoverd the sealing elements for the spool are metal rings with the sealing element embedded in the ring. In my searches I have stumbled upon something called bonded seals which look to be the exact same design but are applied as sealing washers for bolts in high pressure hydraulics - Is anyone out there familiar with the inner workings of spool valves that could guide me in this endevour.

Thanks in advance

[Ben Piecuch]

Welcome to these forums. Unfortunately, you probably won't find much help here, as this group doesn't do any designing of pneumatic valves. We are limited to purchasing off-the-shelf components, and we don't get into the inner workings of them.

However, I've found that the forums on engineersedge.com work very well. Also, there's a lot of general data there to research. My personal experience with moving seals only revolves around piston style o-ring seals The rules governing the design of these systems are very well documented. If you can get your hands on a "Parker O-Ring Handbook" you should be well on your way.

Good luck,

BEN