Omicron 21300-10(H) 316L 21,300 cm² of screen area
There are two essential values to maintain for successful automatic screen filtration at a given flow rate and micron rating: Enough pressure, enough screen area. These values are most critical at the finest filtration degrees -- 10 micron above all, but also true for 20 and 25 micron.
Those of us on the supply side of filtration are responsible to size correctly in response to an engineer advising incoming pressure and max flow.
The imperative of total screen area to assure successful filtration is often underestimated. But it's no less important than adequate wing surface area is to a successful flight. (The two principles are very much related.)
One of the key advantages of Omicron solutions against any competitor in the market is the sheer size of screen area we provide within our housings. Even though the housings are not that much larger than a competitor's, the use of internal space is vastly more efficient, which allows us to maximize the available screen area within.
Here's an easy way to understand the differences. Our models, like a competitor's, are identified by total cm² of screen area. See below, from small to large:
Note: Duplex and triplex manifolds are available for flow rates that exceed the capacity of simplex units.
Now it's easy to see that an "alternative" manufacturer's largest filter (6000 cm²) has about the same capacity as our smallest (5300 cm²). Their largest duplex system -- 2x 6000 (= 12,000 cm²) -- actually has less capacity than our mid-size simplex 13200.
Our largest unit with 21,300 cm² of screen area has more than 3.5 times the capacity of another company's largest (only 6000 cm²).
No surprise then, the reason these alternate filters are sometimes offered as a way to save money is because... they're too small. What seems to be a savings isn't actually the case, when it turns out that an undersized system is installed with inadequate capacity for the flow rate / micron degree.
We are guided in our views of adequate screen area for a given flow rate / micron degree by our 15+ years of direct, empirical experience specific to NYC water conditions. Others might claim, based on product literature published by a manufacturer with reference to general city water conditions -- which are based on a presumption of Turbidity below 1.0 NTU -- that a small amount of screen area is "all that is needed." We know what we know. NYC water Turbidity is routinely greater than 1.0 NTU.
Moreover, we are not seeing evidence of diminishing particle loads in NYC water, and we are seeing a general reduction of incoming water pressure off the street. All of which tells us: Size matters.