On Fri, 06 Dec 2013 19:54:26 -0600, "Lloyd E. Sponenburgh"
lloydspinsidemindspring.com wrote:

Ignoramus5722 fired this volley in
m:

I do realize that I can accomplish what I want, with a electric
pressure switch and a normally open pneumatic valve. But I thought,
perhaps, there is a purely pneumatic valve that does this? What would
it be called?


Ig, you're mistaken about people "waiting for air". Unless their net
usage is higher than the pump capacity, the pump will come on when the
combined tanks get to the desired cut-in pressure, and shut off when they
get topped off, just like they do with smaller tanks. The difference is,
that they can use air-hogs longer before they have to stop.

The total duty cycle will remain approximately what it was before. The
pump will stay on longer, yes; It'll also stay off longer.

You don't need _any_ valves to accomplish what you want. You're over-
thinking it.

(although you should provide manual valves to isolate tanks, in case of a
leak or a service issue)

Lloyd

ABSOLUTELY!!


--
"Owning a sailboat is like marrying a nymphomaniac. You don’t want to do that
but it is great if your best friend does. That way you get all the benefits without any of the upkeep"

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