{"product_id":"watson-mcdaniel-hd-14-n-main-valve-1-inch-npt","title":"Watson Mcdaniel hd-14-n Main Valve 1 Inch Npt","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\n\u003cp\u003eThe WATSON MCDANIEL hd-14-n is a Type HD main valve designed for use in steam and fluid control systems where reliable, normally closed operation is required. This single-seat, threaded valve features balanced phosphor bronze diaphragms and a protected main spring, giving it a virtually frictionless operating mechanism built for long service life. The 1-inch NPT threaded connection makes it compatible with standard pipe fittings, and its design allows for in-line maintenance without removing the valve body from the line. Licensed plumbers and pipefitters are the typical installers of this valve in commercial and industrial steam distribution or pressure-reducing applications.\u003c\/p\u003e\n\u003cp\u003eThe hd-14-n is suited for steam system piping where a normally closed, pilot-operated or direct-acting main valve is needed. Its threaded NPT body simplifies installation in new construction and retrofit projects. The balanced diaphragm design reduces the effect of inlet pressure variation on valve operation, making it a dependable choice for systems that require consistent shutoff and controlled flow. This valve is typically found in commercial boiler rooms, industrial process lines, and large-building steam distribution networks.\u003c\/p\u003e\n\u003ch4\u003eKey Features\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003eNormally closed single-seat design provides positive shutoff at rest\u003c\/li\u003e\n  \u003cli\u003eBalanced phosphor bronze diaphragms minimize friction and wear for extended service life\u003c\/li\u003e\n  \u003cli\u003eProtected main spring resists corrosion and mechanical damage in demanding environments\u003c\/li\u003e\n  \u003cli\u003e1-inch NPT threaded connection compatible with standard pipe fittings\u003c\/li\u003e\n  \u003cli\u003eIn-line maintenance capability allows servicing without removing valve from piping\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eCompatibility\u003c\/h4\u003e\n\u003cp\u003eDesigned as an OEM-style replacement or direct-install main valve for steam and fluid control piping systems using 1-inch NPT threaded connections.\u003c\/p\u003e\n\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\n\u003cp\u003eInstallation of this main valve should be performed by a licensed pipefitter or plumber in accordance with applicable mechanical codes such as the IFGC or local steam piping regulations. Shut down the system and allow full pressure relief and cool-down before beginning any valve work. Use appropriate pipe thread sealant rated for the intended service medium on all NPT connections. Verify flow direction markings on the valve body before final installation.\u003c\/p\u003e\n\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eConnection Type\u003c\/strong\u003e: 1 inch NPT Threaded\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eValve Type\u003c\/strong\u003e: Main Valve, Type HD\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eOperation\u003c\/strong\u003e: Normally Closed\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eSeat Configuration\u003c\/strong\u003e: Single Seat\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eDiaphragm Material\u003c\/strong\u003e: Phosphor Bronze, Balanced\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: WATSON MCDANIEL\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eManufacturer Part Number\u003c\/strong\u003e: hd-14-n\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"WATSON MCDANIEL","offers":[{"title":"Default Title","offer_id":51150087815474,"sku":"HD-14-N","price":936.01,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/305986740.jpg?v=1778605680","url":"https:\/\/voomisupply.com\/products\/watson-mcdaniel-hd-14-n-main-valve-1-inch-npt","provider":"Voomi Supply","version":"1.0","type":"link"}