RO/DI Unit Q's

[stricknine]

I have a nice BFS unit all ready and going but am wondering...

...when not in use should I kill the water to the unit, or just shut off the output and keep the unit pressurized?

May not matter, but I didnt want to dry out the seals, but also dont want to blow out the seals!

Thanks.

 

[melvinudawl]

along for the ride...curious myself. Mine is tapped in under my sink, currently shut off the source when I'm not making water and I discard the first 20 min of output each time.

 

[jdieck]

You can just shut off the output but ony is the system is fitted with an auto shut off valve (ASOV)
This valve is needed to shut off the waste when the output is shut off, otherwise althugh you shut off the outlet the waste line will continue to drain.
If it does not have one you will need to close the inlet and figure out how to keep the wate and ouput lines above the unit so it does not get empty and dry.

 

[stricknine]

Hmmm...

I have a buckeye field supply premium 100 gpd unit. Intake goes to a filter, then to another, then to the ro membrane. From there it has a supply line to the di resin chamber, and another waste outlet. The waste outlet tees to two lines for a few inches (one has a shutoff valve) and thats it.
I cannot figure out the twinned waste water outlet. shut it has high pressure, low waste, and high output. closed it has low pressure, high waste, and low output.
I am assuming this is not the autoshutoff as described?
What is the purpose of that valve aside from decreased efficiency?
And should I kill the supply or output when not in use?

good unit, no instructions...guess I should know what im doing...

THANKS!

 

[jdieck]

<a href=showthread.php?s=&postid=13837142#post13837142 target=_blank>Originally posted</a> by stricknine
Hmmm...

I have a buckeye field supply premium 100 gpd unit. Intake goes to a filter, then to another, then to the ro membrane. From there it has a supply line to the di resin chamber, and another waste outlet. The waste outlet tees to two lines for a few inches (one has a shutoff valve) and thats it.
I cannot figure out the twinned waste water outlet. shut it has high pressure, low waste, and high output. closed it has low pressure, high waste, and low output.
I am assuming this is not the autoshutoff as described?
What is the purpose of that valve aside from decreased efficiency?
And should I kill the supply or output when not in use?

good unit, no instructions...guess I should know what im doing...

THANKS!

The premium 100 does not include the ASOV valve one of the most useful features IMO. Also check your conections, the twin line should be in the product line between the membrane and the DI filter. The valve is used to take RO only water for drinking (You do not usually drink RO/DI water.
Finally a piece of information that may not be good news. The 100 gpd membrane has a rejection of only 90% while membranes of 75 or less gpd have a rejection of 98 to 99%, this means that your membrane lets pass 10% of the ipurities rather than 1 to 2 %, this means that your DI filter will last 5 to 10 times less than with the 75 gpd membrane. I think Buckeye shoud have advised you of that and give you the option also IMO for that price the ASOV should have been a feature included in a "premium" unit.

This is what the ASOV looks like, it costs around $10.00 to $20.00, you will also need to get a check valve for the ASOV to operate properly.

 

[stricknine]

Well i do not have one of those, and I do have a twin line for RO only (c/w shutoff) and other into the DI. Also the waste water out of the RO membrane has the twin mentioned above. (i relly need to learn to post pics, I have a lot)

New questions: Should I have an autoshutoff, check valve, and a plumber?

Also, where should I shut off? I am currently using the main to the nit.

Much appriciated dieck.

 

[jdieck]

Regarding the side valve on the waste line it most probably a flush valve. If installed between the waste outlet of the membrane and the flow restrictor, when opened the restrictor will be bypased thus significantly increasing the flow on the waste side of the membrane, this operation will flush out any particles that precipitate on that side of the membrane to prevent them from plugging the membrane thus extending it's useful life.
Attach a line to that valve and send it to the drain. After using the membrane, open the valve for two minutes to flush the membrane and then shut it off.

Without the ASOV valve I would shut off directly at the inlet of the sediment filter.
Here is a diagram (left side of the drawing) of how the ASOV is installed. From the outlet of the carbon filter goes to the conector marked IN. from the conector marked OUT to the membrane inlet, from the membrane product outlet goes to the check valve (Tail of the arrow), from the outlet of the check goes to either of the unmarked connectors of the ASOV, for the other unmarked conector of the ASOV goes to the DI cartridge and from the outlet of your DI cartridge goes to the manual valve you will use to shut it off.
When you shut the product off the pressure in the product like and unmarked side of the ASOV will rise, the ASOV will detect the rise in the pressure and will shut off the IN/OUT marked side to shut off the water to the membrane.

 

[stricknine]

Again, many thanks. Will keep the unit supply off for now, but plan to use it w/ storage tanks, autotopoff, and sw stowage.

toomany things in the werks now.

 

[jdieck]

:thumbsup:

 

[Buckeye Hydro]

<a href=showthread.php?s=&postid=13837142#post13837142 target=_blank>Originally posted</a> by stricknine
Hmmm...

I have a buckeye field supply premium 100 gpd unit. Intake goes to a filter, then to another, then to the ro membrane. From there it has a supply line to the di resin chamber, and another waste outlet. The waste outlet tees to two lines for a few inches (one has a shutoff valve) and thats it.
I cannot figure out the twinned waste water outlet. shut it has high pressure, low waste, and high output. closed it has low pressure, high waste, and low output.
I am assuming this is not the autoshutoff as described?
What is the purpose of that valve aside from decreased efficiency?
And should I kill the supply or output when not in use?

good unit, no instructions...guess I should know what im doing...

THANKS!

You should have instructions. I think they will answer all your questions. If you'll pm or email us with a request, we'll email you instructions.

 

[malarkey1968]

I have a Kent marine ro/di and I do not have a flow restrictor on my waste output line and was wondering if there should be one.

 

[Buckeye Hydro]

If the system is working ok, you actually do have one, but it may not be obvious if you don't know what you are looking for.

Capillary flow restrictors are INSIDE the upstream end of the waste water tube. Sometimes they are built into the elbow fitting in the waste water port of the RO membrane housing.

Russ