With our leading technology as well as our spirit of innovation,mutual cooperation, benefits and growth, we will build a prosperous future collectively with your esteemed firm for 4021 1100gpd RO Membrane Ulp For Commercial Water Purifier, We give priority to quality and customer satisfaction and for this we follow stringent quality control measures. We have in-house testing facilities where our products are tested on every aspect at different processing stages. Owning to latest technologies, we facilitate our customers with customized production facility. With our leading technology as well as our spirit of innovation,mutual cooperation, benefits and growth, we will build a prosperous future collectively with your esteemed firm for 4021 1100gpd RO Membrane, Our team knows well the market demands in different countries, and is capable of supplying suitable quality products and solutions at the best prices to different markets. Our company has already set up a experienced, creative and responsible team to develop clients with the multi-win principle. 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.