{"product_id":"norgren-4ld-051-d00-inline-barb-check-valve-polypropylene","title":"Norgren 4LD-051-D00 Inline Barb Check Valve Polypropylene","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\u003cp\u003eThe NORGREN 4LD-051-D00 is an inline barb check valve designed to allow one-directional fluid or gas flow while preventing backflow in a line. The body is constructed from polypropylene, making it resistant to a wide range of fluids encountered in pneumatic and fluid handling systems. It connects via barb fittings sized for tubing with a 1\/16-inch inside diameter and an 8.60 mm outside diameter. The valve has a crack pressure of 8.00 psi, meaning flow begins once upstream pressure reaches that threshold. It is commonly installed by HVAC technicians, plumbers, and industrial maintenance professionals working on low-pressure fluid or air circuits.\u003c\/p\u003e\u003cp\u003eThis check valve is suited for inline installation in low-pressure pneumatic lines, condensate drain systems, fluid transfer lines, and similar light-duty applications found in both residential and light commercial settings. The barb connection style allows direct insertion into compatible flexible tubing without additional fittings, simplifying installation in tight or confined spaces where a compact, lightweight valve is required.\u003c\/p\u003e\u003ch4\u003eKey Features\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003eInline flow design prevents backflow and protects upstream components\u003c\/li\u003e\n\u003cli\u003ePolypropylene body offers broad chemical resistance for fluid and pneumatic service\u003c\/li\u003e\n\u003cli\u003eBarb connection fits tubing with 1\/16-inch inside diameter\u003c\/li\u003e\n\u003cli\u003e8.00 psi crack pressure provides a defined, low-pressure actuation point\u003c\/li\u003e\n\u003cli\u003eCompact and lightweight at 0.5 pounds for easy inline integration\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eCompatibility\u003c\/h4\u003e\u003cp\u003eDesigned as an OEM-style replacement or direct-fit inline check valve for low-pressure pneumatic and fluid handling systems using barb-connected flexible tubing with a 1\/16-inch inside diameter.\u003c\/p\u003e\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\u003cp\u003eInstallation is typically performed by HVAC technicians, plumbers, or industrial maintenance technicians. Depressurize and isolate the line completely before removing any existing valve or inserting this check valve. Ensure the flow-direction arrow or marking on the valve body is oriented correctly in the line before securing the barb connections. Verify that tubing inside diameter matches the barb size to maintain a leak-free seal under operating pressure.\u003c\/p\u003e\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eValve Type\u003c\/strong\u003e: Inline Check Valve\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eConnection Type\u003c\/strong\u003e: Barb\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBody Material\u003c\/strong\u003e: Polypropylene\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCrack Pressure\u003c\/strong\u003e: 8.00 psi\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMinimum Pressure\u003c\/strong\u003e: 0 psi\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTube Inside Diameter\u003c\/strong\u003e: 1\/16 inch\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTube Outside Diameter\u003c\/strong\u003e: 8.60 mm\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight\u003c\/strong\u003e: 0.5 pounds\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eStandard Information\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eBrand\u003c\/strong\u003e: NORGREN\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eManufacturer Part Number\u003c\/strong\u003e: 4LD-051-D00\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"NORGREN","offers":[{"title":"Default Title","offer_id":51689001189682,"sku":"4LD-051-D00","price":54.7,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/d177612b3a20c4a3b3d3de6da7bc12f7.jpg?v=1788253602","url":"https:\/\/voomisupply.com\/products\/norgren-4ld-051-d00-inline-barb-check-valve-polypropylene","provider":"Voomi Supply","version":"1.0","type":"link"}