Posted by Fawteen on December 03, 2012 at 13:58:59 from (220.127.116.11):
I'm building a home-made dump trailer. I have a 3.7GPM self-contained piston pump/reservoir/valve being driven by a geared-down gas engine. After a little testing, it is immediately apparent that I need to seriously restrict the flow in the system. The pump with half-inch fittings is moving WAY too much fluid, even with the motor at an idle. I'm aware of in-line restrictors and needle valves, but from what I can find on line, inline restrictors don't go down far enough flow-wise and tend to be one-way, needle valves are too expensive.
What I'd LIKE to do is make my own using a pipe plug and drilling an orifice in it. I can foresee two issues with this:
1. I have no idea what size to make the orifice, and; 2. Pipe plug material is probably too soft and will erode.
This is a bucks-down project, so the less money I have to spend the more likely it is to get done.
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