Reverse Osmosis Drinking Water Filter Systems | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
What is
more effective for Reverse Osmosis Reverse Osmosis Membrane Rejection Guide
Higher Performance RO membranes Begin With Shorter Leaves All spiral-wound reverse osmosis membranes are comprised of membrane "leaves" individual sheets of membrane through which feed water passes and is purified. Short-leaf design is an advantage because less pressure is required to deliver water to the end of each leaf, and more uniform flux is maintained from one end of the leaf to the other. To give an example, APEC's FILMTEC membranes are fabricated with up to twice as many leaves and each leaf is 1/3 to 2/3 shorter than those in other membranes. The result is a highly efficient membrane one that provides purer drinking water and a longer life. Besides overall system designs and parts used, this is the reason why different ROs have different contaminant rejection capabilities. Flow Rate of Reverse Osmosis Systems All reverse osmosis systems are rated (and priced) by their flow rates (Gallons of Pure Water Produces Per Day). The effectiveness and productivity of RO systems increase with greater water pressure and temperature. The actual flow rate (in GPD) of any reverse osmosis system depends on your home water pressure and temperature. This is why all of our systems are named as they are, for example: 36/45 GPD means it is rated at 36 GPD at 50 psi of water pressure, 45 GPD at 60 psi. While the industry standard* is set at 60 psi, we know that not everyone's cold water is at 60 psi and 77 degrees F. Instead of misleading customers into thinking that a 45 GPD system will guarantee a flow rate of 45 GPD, we remind you that you might get less than 45 GPD —perhaps 36 GPD or even less if your pressure and temperature are very low! So when flow rate is critical for you, you need to consider all these factors. *Please note
that the industry standard is not necessarily followed by all vendors.
We have seen other RO systems claiming 100 GPD at 100 psi very unrealistic
input water pressure! So do check on these facts before you make a buying
decision. |