"Tom Gardner" wrote in message
I have a flow control valve like this:
http://www.grainger.com/Grainger/PAR...789?Pid=search
It controls the speed of a 2x10 cylinder and the movement of the
cylinder and mechanism is making the adjustment knob move so the
cylinder gets faster and faster. It does have a set screw that will
lock the adjustment knob but the operator needs to change it often
and during the stroke. Is there a simple way to stiffen the knob
without locking it? (Yes, I could get a new one.)


1. Why not re-plumb the valve to a location that does not vibrate and
possibly is more convenient to the operator?

2. check out http://www.mcmaster.com/#3408a667 Ball-Nose Spring
Plunger as a replacement set screw