{"product_id":"parker-426325003250-375-polypak-seal-3-25x3-75-in","title":"Parker 426325003250-375 Polypak Seal 3.25x3.75 in","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\n\u003cp\u003eThe PARKER 426325003250-375 is a Polypak seal designed for hydraulic and pneumatic cylinder rod and piston applications. It features a 3.25-inch inner diameter, 3.75-inch outer diameter, and a 0.375-inch seal thickness. Rated for a maximum operating pressure of 2000 psi, this seal handles the demands of high-cycle reciprocating motion. The Polypak profile uses an energized lip geometry that maintains consistent sealing contact across a wide service temperature range of -20 degrees F to 250 degrees F. Licensed HVAC techs, plumbers, and hydraulic system technicians rely on this style of seal for reliable static and dynamic sealing in production and field-service environments.\u003c\/p\u003e\n\u003cp\u003eThis Polypak seal is suited for industrial hydraulic cylinders, pneumatic actuators, and fluid power systems where rod or piston sealing is required. It is referenced with 3\/8 pipe thread sizing for installation context. Applications span both light industrial and heavy-duty equipment maintenance scenarios. Field technicians and maintenance professionals installing or rebuilding cylinder assemblies will encounter this seal in both OEM production and aftermarket repair settings.\u003c\/p\u003e\n\u003ch4\u003eKey Features\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003ePolypak energized lip profile maintains consistent contact under dynamic reciprocating motion\u003c\/li\u003e\n  \u003cli\u003eMaximum operating pressure rated at 2000 psi for demanding hydraulic and pneumatic service\u003c\/li\u003e\n  \u003cli\u003eWide temperature range from -20 degrees F to 250 degrees F for varied operating environments\u003c\/li\u003e\n  \u003cli\u003e3.25 inches ID and 3.75 inches OD for precise bore and rod fitment\u003c\/li\u003e\n  \u003cli\u003e0.375 inches seal thickness for drop-in replacement installations\u003c\/li\u003e\n  \u003cli\u003eSold individually — package quantity of 1\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eCompatibility\u003c\/h4\u003e\n\u003cp\u003eDesigned as an OEM-style replacement Polypak seal for hydraulic and pneumatic cylinder assemblies requiring a 3.25-inch ID, 3.75-inch OD, and 0.375-inch thick reciprocating rod or piston seal.\u003c\/p\u003e\n\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\n\u003cp\u003eInstallation is typically performed by hydraulic system technicians or maintenance professionals. Fully depressurize and isolate the hydraulic or pneumatic circuit before disassembling any cylinder component. Use a seal installation tool or smooth mandrel to avoid cutting or rolling the lip during assembly. Inspect the rod or bore surface for scoring before installing the new seal, as surface defects will shorten seal service life.\u003c\/p\u003e\n\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eInner Diameter\u003c\/strong\u003e: 3.25 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eOuter Diameter\u003c\/strong\u003e: 3.75 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eSeal Thickness\u003c\/strong\u003e: 0.375 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMaximum Operating Pressure\u003c\/strong\u003e: 2000 psi\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eTemperature Range\u003c\/strong\u003e: -20 degrees F to 250 degrees F\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003ePipe Thread Reference\u003c\/strong\u003e: 3\/8 inch\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eProduct Type\u003c\/strong\u003e: Polypak Seal\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eWeight\u003c\/strong\u003e: 0.13 pounds\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eUNSPSC Code\u003c\/strong\u003e: 20122851\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003ePackage Quantity\u003c\/strong\u003e: 1\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: 426325003250-375\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"PARKER","offers":[{"title":"Default Title","offer_id":51542963323186,"sku":"426325003250-375","price":178.86,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/bb69f4d1174c22afcabd08744d036ae5.jpg?v=1785912381","url":"https:\/\/voomisupply.com\/products\/parker-426325003250-375-polypak-seal-3-25x3-75-in","provider":"Voomi Supply","version":"1.0","type":"link"}