Building a bleeder valve
HOW IT WORKS
The bleeder valve is a very simple device that bleeds excess pressure from a line.
There is a spring which pushes a ball bearing against an opening.
As the pressure builds in the line the ball bearing is pushed down, hence opening the hole.
The excess pressure then bleeds through the valve.
There is a screw to adjust how much spring pressure is applied to the ball bearing.
This determines the pressure at which the bleeder valve opens.
The more pressure on the ball bearing, the more line pressure you need to force it down.
WHAT'S NEEDEDBarbed fitting with 3/8" female threads.
3/8" coupler with a hole - The male end has coarse threads while the female side has fine threads.
1" long spring
5/16" ball bearing
3/8" fine threaded adjustment screw with hole in bottom
3/8" fine threaded nut
Brass or Plastic T for vacuum line
I believe all of these parts can be bought at a good hardware store, but I haven't checked to make sure.