{"product_id":"hydranautics-cpa5-ld-4040","title":"Hydranautics CPA5 LD 4040","description":"\u003cdiv\u003e\n\u003cdiv\u003e\n\u003cdiv\u003e\n\u003cp dir=\"auto\"\u003eThe \u003cstrong\u003eHydranautics CPA5-LD-4040\u003c\/strong\u003e is a premium \u003cstrong\u003e4x40 low fouling reverse osmosis membrane element\u003c\/strong\u003e engineered by Nitto Hydranautics for exceptional performance in brackish water treatment systems. As part of the renowned CPA series, this fourth-generation \u003cstrong\u003ecomposite polyamide RO membrane\u003c\/strong\u003e delivers outstanding salt rejection of \u003cstrong\u003e99.7%\u003c\/strong\u003e (minimum 99.5%) while producing up to \u003cstrong\u003e2,100 gallons per day\u003c\/strong\u003e (7.95 m³\/day) of high-purity permeate at just 225 psi (1.55 MPa) applied pressure under standard test conditions (1500 ppm NaCl, 77°F\/25°C, 15% recovery).\u003c\/p\u003e\n\u003cp dir=\"auto\"\u003eFeaturing \u003cstrong\u003eLow Fouling (LD) technology\u003c\/strong\u003e with a 34 mil (0.864 mm) feed spacer treated for enhanced resistance to colloidal and biofouling, the CPA5-LD-4040 offers an active membrane area of \u003cstrong\u003e80 ft² (7.43 m²)\u003c\/strong\u003e in a low-differential-pressure design. This translates to longer operating cycles, reduced cleaning frequency, lower energy consumption, and superior system efficiency compared to standard elements—ideal for applications where feedwater quality varies or pretreatment is conventional.\u003c\/p\u003e\n\u003cp dir=\"auto\"\u003eKey performance highlights include:\u003c\/p\u003e\n\u003cul dir=\"auto\"\u003e\n\u003cli\u003eHigh rejection of salts, silica, TOC, hardness, and nitrates for ultrapure water production\u003c\/li\u003e\n\u003cli\u003eMaximum applied pressure: \u003cstrong\u003e600 psig (4.14 MPa)\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003cli\u003eOperating temperature up to \u003cstrong\u003e113°F (45°C)\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003cli\u003epH range: 2-11 continuous (1-13 cleaning)\u003c\/li\u003e\n\u003cli\u003eMaximum feedwater turbidity: \u003cstrong\u003e1 NTU\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003cli\u003eChlorine tolerance: \u003cstrong\u003e\u0026lt;0.1 ppm\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp dir=\"auto\"\u003eBuilt with a durable fiberglass outer wrap, this \u003cstrong\u003e4-inch x 40-inch spiral-wound brackish water RO element\u003c\/strong\u003e excels in municipal drinking water desalination, well water treatment, boiler feedwater makeup, industrial process water, semiconductor ultrapure systems, and TDS reduction prior to ion exchange or other polishing steps.\u003c\/p\u003e\n\u003cp dir=\"auto\"\u003eUpgrade your reverse osmosis system with the \u003cstrong\u003eHydranautics CPA5-LD-4040\u003c\/strong\u003e — the trusted choice for high-rejection, low-energy, low-fouling performance in demanding brackish RO applications. Search terms like \u003cstrong\u003eCPA5-LD-4040 RO membrane\u003c\/strong\u003e, \u003cstrong\u003eHydranautics 4x40 low fouling membrane\u003c\/strong\u003e, \u003cstrong\u003e2100 GPD brackish water RO element\u003c\/strong\u003e, or \u003cstrong\u003e99.7% rejection Nitto RO membrane\u003c\/strong\u003e lead straight to this powerhouse of reliability and value. Contact us for compatibility verification, system integration advice, or bulk pricing on this industry-leading element.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\u003cbr\u003e\u003c\/div\u003e\n\u003c\/div\u003e\n\u003csection\u003e\u003c\/section\u003e\n\u003csection\u003e\u003c\/section\u003e\n\u003c\/div\u003e\n\u003cp\u003e \u003c\/p\u003e","brand":"Hydranautics","offers":[{"title":"Default Title","offer_id":46938376700144,"sku":null,"price":210.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0739\/9453\/5152\/files\/download_a5de0810-5fda-4dce-b746-62060b2152db.png?v=1777062293","url":"https:\/\/knapprochicago.com\/products\/hydranautics-cpa5-ld-4040","provider":"KnappRO","version":"1.0","type":"link"}