Without knowing the details on the new spec SW30-2540 I can only guess
but you will need somewhere between 2.5 and 3 gpm out of the high
pressure pump to run. 24 gph would be running the older 2540 at maximum
output so the new version might work to your advantage. If you shop
around and lie a lot (i.e. Good Intentions Marine Services, Inc ;-) )
you should be able to get an A&M pressure vessel for about $230 and the
membrane for about $160. You can reuse most of the fittings because the
ports are 1/4" on both 2.5" vessels. You will have to get new hose. I
had a fairly long run from the pump to the membranes so I went super
delux and used oversize -8 Aeroquip Teflon hose to reduce pressure drop
as much as possible. Stainless JIC fittings are expensive. My hose and
fittings cost as much as a pressure vessel but believe it or not
McMaster had the best prices.

Steve wrote:

Glenn, I know you have just gone though the 'costing out' of these membranes
and pressure vessels.

I'm considering upgrading my HRO7 from it's present 8gph to it's max rated
capacity of 24gph. I can move the membranes out of the HRO unit enclosure
and bulkhead mount them so I could use the 2.5 X 40s..

I would sure appreciate it if you would share with me the cost and the
vendor..

Steve
s/v Good Intentions



--
Glenn Ashmore

I'm building a 45' cutter in strip/composite. Watch my progress (or lack
there of) at: http://www.rutuonline.com
Shameless Commercial Division: http://www.spade-anchor-us.com