Your Price: $346.82
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Part Number:TW30-4021-DRY

TW30-4021 4" x 21" 900 GPD;DRY

FILMTEC™ reverse osmosis (RO) elements are the globally recognized leader in separations technologies and solutions for industrial, municipal, commercial and consumer water applications. These elements offer high rejection of dissolved solids and organics and operate very efficiently at lower pressures. FILMTEC™ elements also provide excellent structural stability and are more productive than other elements. A complete range of FILMTEC™  elements are available to meet a wide variety of customer needs for commercial applications, from the highest purity water to the lowest total system costs.


Membrane Type Polyamide Thin-Film Composite

Maximum Operating Temperature 113°F (45°C)

Maximum Operating Pressure 600 psig (41 bar)

Maximum Feed Flow Rate (for TW30-2540) 6 gpm (1.4 m3/hr)

Maximum Feed Flow Rate (for TW30-4040) 14 gpm (3.2 m3/hr)

Maximum Pressure Drop 13 psig (0.9 bar)

pH Range, Continuous Operation 2 - 11

pH Range, Short-Term Cleaning (30 min.)b 1 - 13

Maximum Feed Silt Density Index (SDI) 5

Free Chlorine Tolerancec <0.1 ppm

a Maximum temperature for continuous operation above pH 10 is 95°F (35°C).

b Refer to Cleaning Guidelines in specification sheet 609-23010.

c 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, FilmTec recommends removing residual free chlorine by

pretreatment prior to membrane exposure. Please refer to technical bulletin 609-22010 for more information.

Part #

TW30-2013  100          2" X 13"
TW30-2026-DRY  220          2" X 26"
TW30-2514  170          2.5" X 14"
TW30-2521  300          2.5" X 21"
TW30-2540  660          2.5" X 40"
TW30-4014  480          4" X 14"
TW30-4021-DRY  900          4" X 21

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