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New higher capacity ro watermaker membranes available from Dow Filmtec - needs pump design changes?
Suction pump on the product side?
Brian W On Tue, 28 Oct 2003 20:27:46 -0500, Glenn Ashmore wrote: That is not physically possible. THe best you can do is minimize it. It takes almost 2 psi to push half gallon a minute through the 1/4" fitting at the end of the pressure vessel./// wrote: They say you're not allowed to have any product/permeate side back pressure. Was prob the case on the older version as well. /// |
New higher capacity ro watermaker membranes available from Dow Filmtec - needs pump design changes?
"Glenn Ashmore" a écrit dans le message de news:xNDnb.106513$sp2.35714@lakeread04... Ah, I see. They raised it about 20% from .4 to .48 gpm. I will have to update my Rosa program and see how that will effect my flow. I have everything built but will not buy the membranes until the boat is launched. It would have to be compatable because there are to many systems out there tuned for the old product rate. I can see one thing that I do need to check. I sized the diverter solenoid for .6 gpm at 5 psi. If it puts out much more the product side back pressure is going to rise and I will have to up the pump pressure to compensate. Baja-Mo wrote: the 2540 page with 700 gpd is here - http://www.dow.com/liquidseps/pc/jum...c/sw302540.htm they've improved the line and not told the world so the mfg can clean out old inventory - same old story -- Glenn Ashmore I'm building a 45' cutter in strip/composite. Watch my progress (or lack there of) at: http://www.rutuonline.com Shameless Commercial Division: http://www.spade-anchor-us.com |
New higher capacity ro watermaker membranes available from Dow Filmtec - needs pump design changes?
"Glenn Ashmore" a écrit dans le message de news:xNDnb.106513$sp2.35714@lakeread04... Ah, I see. They raised it about 20% from .4 to .48 gpm. I will have to update my Rosa program and see how that will effect my flow. I have everything built but will not buy the membranes until the boat is launched. It would have to be compatable because there are to many systems out there tuned for the old product rate. I can see one thing that I do need to check. I sized the diverter solenoid for .6 gpm at 5 psi. If it puts out much more the product side back pressure is going to rise and I will have to up the pump pressure to compensate. Baja-Mo wrote: the 2540 page with 700 gpd is here - http://www.dow.com/liquidseps/pc/jum...c/sw302540.htm they've improved the line and not told the world so the mfg can clean out old inventory - same old story -- 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 |
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