Product – TW30-4021
Part number – 80608
Applied Pressure psig (bar) – 225 (15.5)

Permeate Flow Rate gpd (m³/d) – 900 (3.41)

Stabilized Salt Rejection % – 99.5

Size – 4″ x 21″


Membrane Type – polyamide thin-film composite

Maximum Operating Temperature – 113°F (45°C)

Maximum Operating Pressure – 600 psig (41 bar)

Maximum Pressure Drop – 13 psig (0.9 bar)

pH Range, Continuous Operations – 2 – 11

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

Maximum Feed Silt Density Index (SDI) – SDI 5

Free Chlorine Concentration – <0.1 ppm

 – Maximum temperature for continuous operation above pH10 is 95°F (35°C)

 – Refer to Cleaning Guidelines in specification sheet 609-23010

 – 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. Please refer to technical bulletin 609-22010 for more information.

If shipping seems a little high to you it is because we do many things to try to have your purchase reach you safely. We will do one or multiples of the following: place item in a plastic bag, sandwich bag between 2 pieces of cardboard, bubble wrap, cushioning material, use a bubble envelope or a box that is larger than necessary to try to protect item during shipping.