Confused with flow meters

[TrentonMaple]

I have a Next Gen Maple 100STDRO. It's a single pole 4x40 which is rated at about 100gph. I want to add flow meters to the concentrate and permeate lines.

These are what I ordered:

NYZWOT Tubig Liquid Daloy ng Metro Flowmeter 1/2 PT Thread M-15 0.2-2GPM 1-7LPM
https://a.co/d/gA2X07v

BNYZWOT Water Liquid Flow Meter Tool Flowmeter Instrument M-15 0.1-1GPM 0.5-
https://a.co/d/dxugUKH

So I have one meter that is 0.2-2GPM, and one that is 0.1-1GPM. Are these correct for a setup my size?

Do I place the lower flow meter on the concentrate line, or vice versa? Which goes where?

And finally, can anyone give me a ballpark as to what values or ratios I should be aiming for on the meters? This all gets so confusing to me!

Thanks to anyone who can help.

[TapTapTap]

I have a Next Gen Maple 100STDRO. It's a single pole 4x40 which is rated at about 100gph. I want to add flow meters to the concentrate and permeate lines.

These are what I ordered:

NYZWOT Tubig Liquid Daloy ng Metro Flowmeter 1/2 PT Thread M-15 0.2-2GPM 1-7LPM
https://a.co/d/gA2X07v

BNYZWOT Water Liquid Flow Meter Tool Flowmeter Instrument M-15 0.1-1GPM 0.5-
https://a.co/d/dxugUKH

So I have one meter that is 0.2-2GPM, and one that is 0.1-1GPM. Are these correct for a setup my size?

Do I place the lower flow meter on the concentrate line, or vice versa? Which goes where?

And finally, can anyone give me a ballpark as to what values or ratios I should be aiming for on the meters? This all gets so confusing to me!

Thanks to anyone who can help.

I have a CDL 1200 and I concentrate to about 14% on a single pass - so I have no idea what kind of output you get with a 100. However, if I were you, I would have measured the output on the concentrate and permeate side and used that information to design the flow meter arrangement. I would do the measurements by quantifying the volume of the outputs over a 1 hour period, or something like that, which would have provided the flow information as gpm.
Ken

[BAP]

I have a Next Gen Maple 100STDRO. It's a single pole 4x40 which is rated at about 100gph. I want to add flow meters to the concentrate and permeate lines.

These are what I ordered:

NYZWOT Tubig Liquid Daloy ng Metro Flowmeter 1/2 PT Thread M-15 0.2-2GPM 1-7LPM
https://a.co/d/gA2X07v

BNYZWOT Water Liquid Flow Meter Tool Flowmeter Instrument M-15 0.1-1GPM 0.5-
https://a.co/d/dxugUKH

So I have one meter that is 0.2-2GPM, and one that is 0.1-1GPM. Are these correct for a setup my size?

Do I place the lower flow meter on the concentrate line, or vice versa? Which goes where?

And finally, can anyone give me a ballpark as to what values or ratios I should be aiming for on the meters? This all gets so confusing to me!

Thanks to anyone who can help.
Why don’t you contact Next Gen Maple and ask them what flow meters they recommend for their machine?

[Bricklayer]

The 0.1-1 gpm would go on the permeate side.
It’s a bit small though. Even though it’s within the flow rates of the RO.
I have 0.5-5gpm on both my concentrate and permeate lines.

I would even like a bigger one on my concentrate line because when doing a wash cycle it just maxes out at 5 and I have no idea what’s going through for gpm.

I have 4 posts on my RO now. Was going to upgrade flow meters this year. But didn’t get time
But when I had a single 4x40 I ran my flows at 1 gpm permeate and 1 gpm concentrate. At 225 psi.
Sometimes I had to squeeze it down to 0.5 concentrate to get my pressure at 225 depending on the sap temp.

Also it’s nice to have a little higher rating on your flowmeters for benchmarking membranes with permeate. With a new membrane at room temp permeate. My flow rate will go north of 2 gpm.

In a nutshell I’d go with 0.5-5 gpm flow meters on both. Or 0.5-5 on concentrate and something that goes to 3 maybe on the permeate side.

[Kbrooks80]

I have a home built with 2 4x40 membranes. I have 3 .1 to 1 GPM meters. 1 for the concentrate of both cans and 1 for the permeate. I try to have the output be about equal on the two sides. I run about .7 GPM on the permeate side.