{"product_id":"value-collection-zmschb90225-nbr-o-ring-backup-ring-25-pack","title":"Value Collection ZMSCHB90225 Nbr O-ring Backup Ring 25-pack","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\n\u003cp\u003eThe VALUE COLLECTION ZMSCHB90225 is a rectangular-cross-section backup O-ring made from Nitrile Butadiene Rubber (NBR), designed to prevent extrusion and seal failure in pressurized systems. With a 1.897-inch inside diameter, 2.131-inch outside diameter, and 0.0468-inch thickness, this Dash 8-225 backup ring seats behind a primary O-ring to support the seal under dynamic or high-pressure conditions. Rated at 90 durometer, the extra-hard hardness grade resists deformation across a working temperature range of -40 to 250 degrees F. Each package contains 25 rings. Licensed plumbers, HVAC technicians, and hydraulic system technicians typically specify this component in service and assembly work.\u003c\/p\u003e\n\u003cp\u003eThis backup ring is suited for use in hydraulic cylinders, pneumatic fittings, valve assemblies, pump housings, and fluid system connections where a primary O-ring requires anti-extrusion support. The NBR material provides solid resistance to petroleum-based oils, fuels, and many common hydraulic fluids, making it a dependable choice for plumbing, HVAC refrigerant circuit hardware, and industrial fluid handling applications. The rectangular cross section locks position against the O-ring groove wall and reduces spiral failure risk under cyclical pressure loads.\u003c\/p\u003e\n\u003ch4\u003eKey Features\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003eDash 8-225 sizing: 1.897 inches ID x 2.131 inches OD x 0.0468 inches thick\u003c\/li\u003e\n  \u003cli\u003e90 durometer extra-hard NBR construction resists extrusion under high-pressure cycling\u003c\/li\u003e\n  \u003cli\u003eRectangular cross section for stable, groove-seated anti-extrusion performance\u003c\/li\u003e\n  \u003cli\u003eWorking temperature range of -40 to 250 degrees F covers most HVAC and hydraulic service conditions\u003c\/li\u003e\n  \u003cli\u003eNBR compound offers broad compatibility with petroleum oils, fuels, and common hydraulic fluids\u003c\/li\u003e\n  \u003cli\u003eSold in a 25-piece package for bench stock and service kit replenishment\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eCompatibility\u003c\/h4\u003e\n\u003cp\u003eDesigned as an OEM-style replacement or service-stock backup ring for fluid system assemblies requiring a Dash 8-225 rectangular-section anti-extrusion ring in NBR material.\u003c\/p\u003e\n\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\n\u003cp\u003eInstallation should be performed by a licensed plumber, HVAC technician, or hydraulic system technician. Depressurize and isolate the system completely before disassembling any fitting, valve, or cylinder that retains this component. Inspect the O-ring groove for burrs, corrosion, or dimensional damage before seating the backup ring and primary O-ring. Do not stretch the backup ring beyond the groove diameter or use sharp tools that could nick the sealing surfaces.\u003c\/p\u003e\n\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eInside Diameter\u003c\/strong\u003e: 1.897 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eOutside Diameter\u003c\/strong\u003e: 2.131 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eThickness\u003c\/strong\u003e: 0.0468 inches (3\/64 inch)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eDash Number\u003c\/strong\u003e: 8-225\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCross Section Shape\u003c\/strong\u003e: Rectangle\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMaterial\u003c\/strong\u003e: Nitrile Butadiene Rubber (NBR)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eHardness\u003c\/strong\u003e: 90 durometer (Extra Hard)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMinimum Working Temperature\u003c\/strong\u003e: -40 degrees F\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMaximum Working Temperature\u003c\/strong\u003e: 250 degrees F\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eFDA Approved\u003c\/strong\u003e: No\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003ePackage Quantity\u003c\/strong\u003e: 25\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eWeight\u003c\/strong\u003e: 0.01 pounds\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eUNSPSC Code\u003c\/strong\u003e: 31401503\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: VALUE COLLECTION\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eManufacturer Part Number\u003c\/strong\u003e: ZMSCHB90225\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"VALUE COLLECTION","offers":[{"title":"Default Title","offer_id":51689419899186,"sku":"ZMSCHB90225","price":20.73,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/bbbcceebcc98f31c0d76bce29370f44a.jpg?v=1788259200","url":"https:\/\/voomisupply.com\/products\/value-collection-zmschb90225-nbr-o-ring-backup-ring-25-pack","provider":"Voomi Supply","version":"1.0","type":"link"}