{"product_id":"parker-cv-1-1188-inline-check-valve-1-2-inch-fnpt","title":"Parker CV-1-1188 Inline Check Valve 1\/2 Inch Fnpt","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\n\u003cp\u003eThe PARKER CV-1-1188 is an inline check valve designed to allow one-directional flow while preventing backflow in fluid and gas piping systems. The body and spring are constructed entirely of polytetrafluoroethylene (PTFE), making this valve well suited for chemically aggressive media where metal-bodied valves would corrode or contaminate the process stream. Connections are 1\/2 inch FNPT on both ends, and the valve carries a Cv rating of 4.220, indicating relatively low flow restriction for its pipe size. Crack pressure ranges from 0.25 to 0.75 psi, allowing the valve to open under minimal differential pressure. Licensed plumbers, pipefitters, and industrial maintenance technicians are the primary installers.\u003c\/p\u003e\n\u003cp\u003eThis check valve is appropriate for residential and light commercial plumbing, chemical feed lines, water treatment systems, and process piping where PTFE chemical resistance is required. The FNPT x FNPT end connections allow direct threaded installation into standard 1\/2 inch NPT piping. Operating temperature is rated up to 130 degrees F, and the lower limit is -32 degrees C (approximately -26 degrees F), covering a broad range of ambient and fluid temperatures common in indoor mechanical and process applications. Its all-PTFE construction makes it a common choice where contact with chlorinated water, mild acids, or other corrosive fluids is expected.\u003c\/p\u003e\n\u003ch4\u003eKey Features\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003eAll-PTFE body and spring construction for broad chemical resistance\u003c\/li\u003e\n  \u003cli\u003e1\/2 inch FNPT x FNPT threaded end connections for straightforward in-line installation\u003c\/li\u003e\n  \u003cli\u003eLow crack pressure (0.25 to 0.75 psi) allows opening under minimal differential\u003c\/li\u003e\n  \u003cli\u003eCv rating of 4.220 minimizes pressure drop across the valve at normal flow rates\u003c\/li\u003e\n  \u003cli\u003eRated to 130 degrees F maximum, suitable for cold and ambient-temperature fluid service\u003c\/li\u003e\n  \u003cli\u003eInline valve orientation keeps installation compact within existing pipe runs\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eCompatibility\u003c\/h4\u003e\n\u003cp\u003eDesigned as an OEM-style replacement or new-installation inline check valve for 1\/2 inch NPT threaded piping systems requiring PTFE wetted components.\u003c\/p\u003e\n\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\n\u003cp\u003eInstallation is performed by a licensed plumber or qualified pipefitter in accordance with applicable plumbing codes such as the IPC. Shut off system pressure and depressurize the line completely before removing any existing valve or fitting. Apply thread sealant rated for PTFE-compatible service; avoid over-tightening threaded PTFE-bodied fittings, as excessive torque can crack the body. Verify flow-direction orientation before final make-up, as check valves are directional and will not function if installed backwards.\u003c\/p\u003e\n\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eValve Type\u003c\/strong\u003e: Inline Check Valve\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003ePipe Size\u003c\/strong\u003e: 1\/2 inch\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eConnection Type\u003c\/strong\u003e: FNPT x FNPT\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eBody Material\u003c\/strong\u003e: Polytetrafluoroethylene (PTFE)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eSpring Material\u003c\/strong\u003e: Polytetrafluoroethylene (PTFE)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCv Rating\u003c\/strong\u003e: 4.220\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCrack Pressure\u003c\/strong\u003e: 0.25 to 0.75 psi\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMaximum Temperature\u003c\/strong\u003e: 130 degrees F\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMinimum Temperature\u003c\/strong\u003e: -32 degrees C\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eWeight\u003c\/strong\u003e: 0.25 pounds\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eStandard Information\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eBrand\u003c\/strong\u003e: PARKER\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eManufacturer Part Number\u003c\/strong\u003e: CV-1-1188\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"PARKER","offers":[{"title":"Default Title","offer_id":51542993404210,"sku":"CV-1-1188","price":531.76,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/07bc41a83082e1b7ae1e8b64bd6501a8_25b2320d-1e75-4d86-9cea-06b43edac8f5.jpg?v=1785913200","url":"https:\/\/voomisupply.com\/products\/parker-cv-1-1188-inline-check-valve-1-2-inch-fnpt","provider":"Voomi Supply","version":"1.0","type":"link"}