Description:?
Dow Filmtec TW30-1812-100 Reverse Osmosis Membrane Specs: Dimensions: 1.75" W X 11.75" L Maximum Operating Temperature: 113?F (45?C) TW30-1812-36 ΔP (psig) @ Flow Rate (gpd): 50 psig @ 100 gpd (Permeate flows for individual elements may vary +/- 20%) Maximum Operating Pressure: 300 psig (21 bar) Maximum Feed Flow Rate: 2.0 gpm (7.6 lpm) Maximum Feed Silt Density Index (SDI): 5 Free Chlorine Tolerance: (Maximum temperature for continuous operation above pH 10 is 95?F (35?C)) pH Range, Short Term Cleaning (30 min.): 1-12 Dow Filmtec TW30-1812-100 Reverse Osmosis Membrane Materials of Construction: Membrane Type: Polyamide Thin-Film Composite
With so many on offer these days, it is great to have a name you can trust. This item is certainly that and will be a perfect buy. The distributor have added some great touches and this equals great value.
You can trust this review, i hope you can try to buy this product and then you know this product good or no. Next time you can make a review for another people.
best bang for the buck 100 GPD membrane
I rate the Filmtec 100 GPD membrane 5 stars over-all. Filmtec 100 GPD Delivers high volume high quality water in the 5-10 PPM output with a 257 PPM input with 80 PSI. Filmtec rates it at 90% which is standard I have a DI single stage added on the output for my reef water with a total quality of 0 PPM.
Keep in mind the higher the output (GPD) usually means lower quality water (Higher PPM) so if water quality is important and you do not want to run a DI stage you are better off with a lower GPM membrane. Also important is input pressure must be over 50 PSI also remember to change out your restrictor for best performance. I have a 100 GPD membrane on my reef water and 75GPD membrane in my kitchen and a 24 GPD for my master bathroom. Filmtec make in my opinion the best residential membrane for most aquariums hobbyists and personal consumption.
I came to buy a new filters for my reef set-up and discovered someone rated it 1 star not for performance because the fact...
Click here to read the full review for more information about this product.
RO performance
Remember that any RO membrane must be operated at a ratio of 5:1 for best performance.
That means that the cross flow is 5 x the permeate flow per membrane.
If your membrane is permeating 100GPD (263ml/minute)then the correct restrictor would be 1500ml/minute) or a 15% recovery
you can however, increase your system recovery by adding membranes in series (up to 3)feeding the consecutive membrane with the concentrate of the previous and then placing the same 1500ml/minute restrictor at the tail end. The permeate would be trippled to 789, the concentrate would still be 1500ml/minute so the recovery would be 35%
Larger, industrial units operate at up to 80% recovery, emulating the 1:5 by recirculating part of the concentrate back to the inlet of the first membrane. This requires the incorporation of a pump, valves and flow meters in the circuit.
Feeding the RO softened water will allow the RO to be operated at less than 5:1, even as low as 3:1...
Not good for reef tanks..
Bought 2 RO filters to replace existing membrane for salt water reef tanks. Followed instructions to let run for 1 hr, could not get water better than 48 ppm we then ran for another hour, with no change. we then repeated the process with the backup filter purchased from the same company with the same result. We ended up putting the old membrane back into the filter producing 18 ppm.
we do not recommend this product for salt water reef tanks.
Product Features :
- New - Retail
- 30-Day Warranty
- Filmtec TW30-1812-100
- Dow Filmtec Tw30-1812-100 Reverse Osmosis Membrane
Rating : 3.4 out of 5.0
List Price : $35.22
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