Home build test run.

[jake1]

I tested my ro today and seemed to have a pressure issue. Its got two 4040s. With a 330 procon on a 1 horse. I was using water and wanted to bring it up to pressure momentarily to do a leak check. I slowly built pressure but it maxed out at 150psi. It would not build anymore and my concentrate valve was nearly closed. No pressure relief or anything and Its plumbed correctly with a feed pump giving the Hp pump 40 psi. Sure seems like I should get higher pressure with the setup. Not sure what's up. Should have sap in a few days to do more testing with. Any ideas would be helpful thanks
Jake

[jmayerl]

So you are trying to separate water from water....... think on that for a bit.

[jake1]

Tried it with water again here are my flow rates.
Pressure.________Perm gpm._______ Conc gpm
40._____________ .2___________________ 5
75. ____________ 1.___________________ 3.75
100.____________ 1.5__________________3.25
150.____________ 2.5__________________2
170.____________2.75__________________1.3

At 170 my Conc valve is nearly closed and if I try to go anymore it deadheads the pump and tries to kill the motor. Its got correct power. But it just seems like the pump doesn't have it in it to turn harder. I'm seeing air in my flowmeter on the Conc side when I'm over 150. I've got no leaks on the suction side in aware of but seems like maybe pump is cavatating.but if it was I cant imagine it stopping the motor. Its got me stumped.

[Bricklayer]

No, if it builds pressure that quick means the system is full. 40 is a good feed pressure. I use my low pressure pump at 45-50 psi when I wash. I don't even use the hp pump during wash and rinse.

Have you been able to increase your overall pressure yet?

[jake1]

There is deffinety a rattle to the pump, not bad but a uniform clicking as it runs, not sure what it is suppose to sound like. Its brand new

[Bricklayer]

Does it sound like this?

https://youtu.be/f36Fvy6IyHM

[mkoehler79]

Does it sound like this?

https://youtu.be/f36Fvy6IyHM

Mine didn't even sound that bad. I just noticed my flows and pressure was down to the point I couldn't even use the recirc loop.

[jake1]

Ha! Got the new pump. Still the same. So I borrowed a generator that has 230 and wired it to that and the performance increased. So its an issue with the motor. Is not starved for voltage, it just wont draw much. I wired it to 115v and it doesn't seem to draw more than 5 amps. Just guessing by how My generator reacts. It runs normal and doesn't heat up more than lukewarm. But it just wont draw much load when it needs to. I wonder if there's a brush that's misaligned in the motor so is low on power? Its a new lesson 1 hp. had the front plate off at one point, maybe I tweaked a brush in the back. Don't really want to tare into it because it s working and the saps flowing. Got a spare pump now at least.

[jake1]

Yeah wasnt sure if running strait water would effect pressure that much but I guess it probably does eh?

[Bricklayer]

You should still be able to build more pressure then that. Do you have a recirc line ? If you do, try closing it and see if your pressure is effected