We take pleasure in an exceptionally excellent status between our buyers for our superb merchandise good quality, aggressive price tag and the greatest support for Manufacturer for RO Membrane 4021 RO Membrane Filter RO Membranes 8040/4040, We attend seriously to produce and behave with integrity, and by the favor of customers at home and abroad in the xxx industry. We take pleasure in an exceptionally excellent status between our buyers for our superb merchandise good quality, aggressive price tag and the greatest support for 4021 RO Membrane Filter, RO Membrane 4021, Relying on superior quality and excellent post-sales, our products sell well in America, Europe, the Middle East and South Africa. We are also the appointed OEM factory for several worlds' famous products brands. Welcome to contact us for further negotiation and cooperation. RO Membrane 4021 HIDTM Industrial RO Membrane ranks the best brands in China among the RO membrane industry. RO Membrane 4021 has won the trust of thousands of families for feeding the reliable purified water over 10 years. Each membrane is made of HID developed & pre-examined sheet and goes through stringent making processes as well as in-house quality inspection & testing before delivery. HID Membrane has been certified by SGS & China Jiangsu Sanitation Bureau wrt drinking water membrane elements. Model RT-2521 HF RT-2540 HF RT-4021 HF RT-4040 HF RT-8040 HF Performance Stable Desalination % 98 98 98 99 99.3 Min. Desalination % 97 97 97 98 98.5 Mean Permeable Flow GPD (L/d) 380(1300)  780(2800) 1000(3400)  2800(9500)  11000(41000) Active Film Area ft2(m2) 13 (1.2) 28 (2.6) 36 (3.3) 97 (9) 400 (37) Test Conditions Pressure 100psi(0.7Mpa) 225psi(1.55Mpa) Water Temp. 25℃ 25℃ Concentration(NaCl) 2000ppm 2000ppm Water PH 6.5 to 7.5 6.5 to 7.5 Recovery Rate % 15 15 Operating Conditions Max. Operating Pressure 600psi(4.2Mpa) 600psi(4.2Mpa) Max. Feed Water Temp. 45℃ 45℃ Max. Feed Water Silt Density Index (SDI) 5 5 Feed Water Chlorine Tolerance < 0.1ppm < 0.1ppm Feed Water PH Range, Continuous Operation 3 to 10 3 to 10 Feed Water PH Range, Short-Term Cleaning 2 to 12 2 to 12 Max. Pressure Drop of Single Membrane 15psi(0.1Mpa) 15psi (0.1Mpa) 1. Permeate flow rate and salt rejection is based on testing conditions: 25℃, PH 7.5, 20% recovery. 2. Stabilized salt rejection is generally achieved within 24-48 hours of continuous use, depending upon feedwater characteristics and operating conditions.