Dow Filmtec XLE-4021
Reverse Osmosis (RO) Membrane

1,025 GPD low pressure light industrial / commercial / whole house replacement reverse osmosis (RO) membrane element

Specifications: Membrane Type: Polyamide Thin-Film Composite (TFC) Maximum Operating Temperature: 113F (45C) Maximum Operating Pressure: 600 psi (41 bar) Maximum Pressure Drop: 13 psi (0.9 bar) Maximum Feed Flow Rate: 14 gpm (3.2 m3/hr) pH Range, Continuous Operation: 2-11*** pH Range, Short-Term Cleaning: 1-13* (30min) Maximum Feed Silt Density Index: 5 SDI Free Chlorine Tolerance: < 0.1 ppm** Permeate Flow Rate: 1,025 GPD (3.9 m3/day)* Stabilized Salt Rejection: 99.0% *Permeate flow and salt rejection based on the following test conditions: 500 ppm NaCl feedstream, applied pressure of 100 psi (6.9 bar), 77°F (25°C) and the following recovery rates: XLE-2521, XLE-4021 – 8%; XLE-2540, XLE-4040 – 15%. Permeate flow rates for individual elements may vary +/-20%. **Under certain conditions, the presence of free chlorine and other oxidizing agents will cause premature membrane failure. Since oxidation damage is not covered under warranty, Dow recommends removing residual free chlorine by pretreatment prior to membrane exposure. Most RO systems have carbon pre-filters for this purpose. ***Maximum temperature for continuous operation above pH 10 is 95F (35C).

Dimensions:

A: 21.0" (533mm)    B: 1.05" (26.7mm)    C: 0.75" (19mm)    D: 3.9" (99mm)

Model	Diameter Inches	Length Inches	Active Surface Area ft2 (m2)	Test Pressure	Permeate Flow Capacity GPD (m3/day)	Price Each
Filmtec XLE-4021 Our Stock #7030402101 Dow Part #154540	4.0	21	36 (3.3)	100 psi	1,025 (3.9)	US$289.95 Free Shipping!

Notice: The use of this product in and of itself does not necessarily guarantee the removal of cysts and pathogens from water. Effective cyst and pathogen reduction is dependent on the complete system design and on the operation and maintenance of the system.