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Posted by Chris Case [75.36.40.184] on Saturday, November 24, 2012 at 18:38:34 :
In Reply to: Re: t shuts off the leaky side if imbalanced. posted by Russ Roth [24.21.77.67] on Saturday, November 24, 2012 at 15:25:34 :
If it shuts off the flow to the leaky side, the pedal gets hard as a rock. It only has 1/2 as much 'flex' in half of a system.
Basically, that is a spool valve with a switch contact in the middle. Push to one side, valve shuts off, light comes on.
Or not.
The 'hold off' function is only on disc/drum systems.
What people buy as aftermarket gismos are usually only hold off valves. NOT proportioners. But they call them that. A true proportioning system has to have both front and rear systems plumbed to it.
Put it all together in one unit, it's called a Combination valve.
Or maybe it's just a pressure differential switch.
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