{"product_id":"ussealac52126211803-ac-52-126-211-803-mechanical-seal-2-in","title":"USSEALAC52126211803 AC-52-126-211-803 Mechanical Seal 2 in","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\n\u003cp\u003eThe USSEALAC52126211803 AC-52-126-211-803 is a replacement mechanical seal designed for centrifugal pump applications. It carries a seal material code of QCFKF, indicating a silicon carbide face, carbon secondary seal, fluoroelastomer elastomers, and a stainless steel metal hardware configuration — a durable combination suited for demanding fluid-handling environments. The head style is C with a seat type 3 configuration, and it fits a 2-inch shaft. This seal is installed by pump service technicians and millwrights working on industrial or commercial centrifugal pump systems.\u003c\/p\u003e\n\u003cp\u003eThis mechanical seal is a direct replacement for A-C Pump part number 52-126-211-803. It is suited for use in centrifugal pump assemblies where the original A-C Pump seal requires replacement due to wear, leakage, or scheduled maintenance. The seat bore of 3.00 inches and head outer diameter of 2.88 inches are critical fit dimensions that should be verified against the pump housing before installation. Typical applications include HVAC circulation pumps, industrial process pumps, and water supply systems.\u003c\/p\u003e\n\u003ch4\u003eKey Features\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003eSeal material code QCFKF for chemical and thermal resistance in pump service\u003c\/li\u003e\n  \u003cli\u003eFits 2-inch shaft diameter with a head outer diameter of 2.88 inches\u003c\/li\u003e\n  \u003cli\u003eHead installed length of 1.50 inches for accurate dimensional replacement\u003c\/li\u003e\n  \u003cli\u003eSeat bore of 3.00 inches and seat thickness of 0.50 inches\u003c\/li\u003e\n  \u003cli\u003eHead style C, seat type 3 configuration for direct OEM-style fitment\u003c\/li\u003e\n  \u003cli\u003eDirect replacement for A-C Pump part number 52-126-211-803\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eCompatibility\u003c\/h4\u003e\n\u003cp\u003eDirect replacement for A-C Pump mechanical seal part number 52-126-211-803. Verify shaft diameter, seat bore, head outer diameter, and installed head length against the pump assembly before installation.\u003c\/p\u003e\n\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\n\u003cp\u003eMechanical seal replacement should be performed by a qualified pump technician or millwright. Isolate and de-energize the pump, close all isolation valves, and relieve system pressure before disassembly. Handle seal faces carefully to avoid nicks or contamination — do not touch lapped sealing faces with bare hands. Follow the pump manufacturer's service manual for proper installation sequence and spring compression guidelines.\u003c\/p\u003e\n\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eSeal Material Code\u003c\/strong\u003e: QCFKF\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eHead Style\u003c\/strong\u003e: C\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eSeat Type\u003c\/strong\u003e: 3\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eShaft Size\u003c\/strong\u003e: 2 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eHead Outer Diameter\u003c\/strong\u003e: 2.88 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eHead Length Installed\u003c\/strong\u003e: 1.50 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eSeat Bore\u003c\/strong\u003e: 3.00 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eSeat Thickness\u003c\/strong\u003e: 0.50 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eShipping Weight\u003c\/strong\u003e: 1.50 pounds\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eShipping Dimensions\u003c\/strong\u003e: 6.00 x 6.00 x 6.00 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCustoms Code\u003c\/strong\u003e: Schedule B 8484200000\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: USSEALAC52126211803\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eManufacturer Part Number\u003c\/strong\u003e: AC-52-126-211-803\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"US SEAL","offers":[{"title":"Default Title","offer_id":51524418011442,"sku":"AC-52-126-211-803","price":411.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/d9ee9a6cb403f167c2ffaf56549a2403.webp?v=1785448584","url":"https:\/\/voomisupply.com\/products\/ussealac52126211803-ac-52-126-211-803-mechanical-seal-2-in","provider":"Voomi Supply","version":"1.0","type":"link"}