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replicating hand slide valve help
Posted: Fri May 20, 2011 12:23 pm
by Major Collins
upgrading from a ball valve and would like to replicate a hand slide valve ,like this one
how should i go about it?
also this same slide valve as you see has 16 mm male thread, is that close to 1/2 inch npt threads? ( eg would this screw into a 1/2 female tee)
btw this exact model is about 10$ posted on ebay
Posted: Fri May 20, 2011 3:57 pm
by jackssmirkingrevenge
You mean you're going to use this to pilot an exhaust valve, right?
Posted: Fri May 20, 2011 8:28 pm
by POLAND_SPUD
it can be done but it is probably cheaper to buy one...
Technically it isn't very complicated - it's just an inverted spool valve (the slide acts as the spool).
Posted: Fri May 20, 2011 10:00 pm
by Major Collins
jackssmirkingrevenge wrote:You mean you're going to use this to pilot an exhaust valve, right?
yeah for replacing a ball valve for actuating a piston valve
Posted: Fri May 20, 2011 10:31 pm
by Crna Legija
really if it only $10 just buy it, coz they would be hard to make with out a lathe
Posted: Fri May 20, 2011 11:42 pm
by PVC Arsenal 17
Check out
this thread. It should be just what you're looking for.
Consult
this page for a nice diagram of how they work.
(slide check = slide valve = sleeve valve)
IIRC you can buy 1/2" NPT sleeve valves from McMaster. If you're using it as a pilot, you're probably best off just buying a smaller one and adapting it to 1/2" with some fittings. An 1/8" sleeve valve should be more than enough to pilot a 3/4" QEV. If not, you can drill additional exhaust holes.