FAQS
Frequently Asked Questions
Q1: What is the DOW BW30-400 (8040) RO membrane used for?
It's a brackish water reverse osmosis membrane element designed for municipal and industrial water treatment systems producing more than 10 GPM of permeate — commonly used for industrial demineralization, drinking water production, and water reuse applications.
Q2: What is the flow rate and rejection rate of the BW30-400 membrane?
It delivers a permeate flow rate of 1000 LPH with a stabilized salt rejection of 99.5%, and has an active surface area of 400 sq. ft.
Q3: What size housing does the BW30-400 (8040) membrane fit?
BW30-400 is an 8-inch diameter element (commonly referred to as "8040"), designed to fit standard 8" membrane housings.
Q4: What is the maximum operating temperature and pH range for this membrane?
Maximum operating temperature is 113°F (45°C), and it supports a continuous operation pH range of 2–11, with a wider cleaning pH tolerance of 1–13.
Q5: How long does the DOW BW30-400 membrane last, and is it under warranty?
Pearl Water offers a 1-year warranty on this membrane, along with a 10-day replacement window from the date of purchase in case of manufacturing defects.
Q6: How do I install or replace this membrane safely?
Avoid abrupt pressure or cross-flow changes during startup or shutdown. Feed pressure should ramp up gradually over 30–60 seconds, cross-flow velocity over 15–20 seconds, and the permeate from the first hour of operation should be discarded before regular use.
Q7: What is the price of the DOW BW30-400 8040 RO membrane?
It's priced at ?36,099 (exclusive of taxes) / ?42,597 (inclusive of taxes), with volume discounts available — 3% off on 2 units, 4% off on 3 units, and 5% off on 4 or more.
Q8: Can I buy this membrane on Amazon or Flipkart instead of the website?
Yes, Pearl Water Technologies' products including this membrane are also listed for purchase on Amazon and Flipkart, in addition to direct ordering on pearlwater.in.
