Flush Valve ??????

[nyfireman3097]

I have one of these
http://www.premiumaquatics.com/Merc...roduct_Code=SP-FLUSH-KIT&Category_Code=SProac

How do you hook it up and what does it di exactly ??????

 

[masterswimmer]

Nick, when you run your RO/DI with the flush valve in the open position, it creates LESS backpressure on your membranes. The water flows out the waste water line and cleans the membranes (extending the life of the filters).

When you close the flush valve, it directs the water through the other line and inside of that line should be a flow restrictor. This creates the backpressure needed for the water to flow through the filters and through the waste/permeate lines accordingly.

Hope that's clear. I know it can be confusing.

swimmer

 

[nyfireman3097]

Hey Russ you think I could give you a call or call me ?
718 554 4397
Nick

 

[masterswimmer]

Calling you in about one minute

Russ

 

[Buckeye Field Supply]

Nick, when you run your RO/DI with the flush valve in the open position, it creates LESS backpressure on your membranes. The water flows out the waste water line and cleans the membranes (extending the life of the filters).

When you close the flush valve, it directs the water through the other line and inside of that line should be a flow restrictor. This creates the backpressure needed for the water to flow through the filters and through the waste/permeate lines accordingly.

swimmer

Swimmer is entirely correct.

You flush valve is simply a flow restrictor bypass.

If you were in a lab situation, or running a expensive RO system, you might flush the membrane everytime you turn it off. For most folks in this hobby that's not practical. One a week is better than once a month is better than once a year.

Russ @ BFS

 

[meschaefer]

Swimmer is entirely correct.

You flush valve is simply a flow restrictor bypass.

If you were in a lab situation, or running a expensive RO system, you might flush the membrane everytime you turn it off. For most folks in this hobby that's not practical. One a week is better than once a month is better than once a year.

Russ @ BFS

for how long should you flush the membrane? I know every system will be different, but are we genrerally talking seconds, minutes, hours..

 

[Buckeye Field Supply]

for how long should you flush the membrane? I know every system will be different, but are we genrerally talking seconds, minutes, hours..

As you suspected there's no hard and fast rule here - a membrane run at a low waste to permeate ratio, or a membrane presented with low quality feed water may require more flushing that would otherwise be the case.

Remember that what is commonly refered to was "waste water" serves a purpose - it constantly flushes the membrane. So when you hear a vendor claiming they have unique self-flushing membranes, your BS meter ought to start sounding. All RO membranes are "self-flushing."

Back to your question. Some rules of thumb: Flush for no less than 1 minute. That should be sufficient to replace the relatively high tds waste water within the membrane with lower tds flush water.

Flushing for 3-5 minutes is a widely held standard.

 

[meschaefer]

thanks.. I know there are never hard and fast rules with these things, but sometimes you just need a guideline to work with, as opposed to just winging it without any reasoning.

 

[nyfireman3097]

Hey buck what makes a RO membrane diffrent frorm others ?

 

[Buckeye Field Supply]

Hey buck what makes a RO membrane diffrent frorm others ?

One of the most important things to a membrane user is that Filmtec membranes need only 50 psi to reach their rated capacity. Other brands need 60 or 65 psi.