{"product_id":"castair-pressure-gauge-1-4-npt-2-5-flanged-dial-0-300-psi-bottom-mount-gf251430b","title":"Castair Pressure Gauge 1\/4\" NPT 2.5\" Flanged Dial 0-300 PSI Bottom Mount GF251430B","description":"\u003ch2\u003eCastair Pressure Gauge — 1\/4\" NPT, 2.5\" Flanged Dial, 0-300 PSI, Bottom Mount (GF251430B)\u003c\/h2\u003e\n\u003cp\u003eThe GF251430B is a 2.5-inch flanged-dial pressure gauge with a 1\/4\" NPT bottom-mount connection and a 0-300 PSI range, priced at 42.35. This is the flanged-dial variant in Castair's gauge lineup — where the standard gauges have a smooth bezel that fits into a panel cutout or mounts on a pipe, the flanged dial has a flange around the face perimeter that allows it to mount flush against a panel face with visible mounting tabs. This style is commonly used in control panel applications where the gauge needs a secure, professional panel mount.\u003c\/p\u003e\n\n\u003ch2\u003eFlanged vs. Standard Gauge Bezel — What's the Difference?\u003c\/h2\u003e\n\u003cp\u003eThe \"flanged\" dial means the gauge face has a protruding rim or flange that sits against the panel surface when the gauge is installed. Standard gauges typically fit through a hole with a slip-fit or friction fit; flanged gauges have a positive stop against the panel face and often include bolt or clip mounting provisions. This makes them more secure in high-vibration applications and gives a cleaner finished look in control panels.\u003c\/p\u003e\n\u003cp\u003eThe GF251430B uses a bottom-mount connection — the 1\/4\" NPT fitting enters from below the gauge body. This is the standard orientation for panel-mount gauges where the pipe run comes from below.\u003c\/p\u003e\n\n\u003ch3\u003eGauge Specifications\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eConnection:\u003c\/strong\u003e 1\/4\" NPT — standard thread for Castair pressure ports\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMount:\u003c\/strong\u003e Bottom mount — pipe enters from below the gauge body\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDial Style:\u003c\/strong\u003e Flanged — flanged bezel for secure panel-mount installation\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDial Size:\u003c\/strong\u003e 2.5 inches — readable at working distance\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRange:\u003c\/strong\u003e 0-300 PSI — covers all Castair compressor operating pressures\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFrame:\u003c\/strong\u003e Steel frame construction\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePart Number:\u003c\/strong\u003e GF251430B\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eWhere the GF251430B Fits in the Castair Gauge Lineup\u003c\/h2\u003e\n\u003cp\u003eCastair's gauge catalog covers three dial styles in multiple sizes and pressure ranges:\u003c\/p\u003e\n\n\u003ch3\u003eStandard Dry Gauges — 2.5\" Size\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eG251430B\u003c\/strong\u003e — 1\/4\" NPT, 2.5\" dial, 0-300 PSI, back mount, dry\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eG251430U\u003c\/strong\u003e — 1\/4\" NPT, 2.5\" dial, 0-300 PSI, bottom mount, dry\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eLiquid-Filled Gauges — 2.5\" Size\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003e*GL251430B\u003c\/strong\u003e — 1\/4\" NPT, 2.5\" liquid-filled dial, 0-300 PSI, back mount\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e*GL251430U\u003c\/strong\u003e — 1\/4\" NPT, 2.5\" liquid-filled dial, 0-300 PSI, bottom mount\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eFlanged Dial Gauge\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eGF251430B — THIS PRODUCT\u003c\/strong\u003e — 1\/4\" NPT, 2.5\" flanged dial, 0-300 PSI, bottom mount\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eWhen Does a Shop Need the Flanged Gauge vs. Standard or Liquid-Filled?\u003c\/h2\u003e\n\u003cp\u003eIf you are replacing a gauge that has a flanged bezel and clips or bolts to the panel face, you need the GF251430B. Fitting a non-flanged gauge in a flanged-gauge hole leaves the gauge unsecured and looks unfinished.\u003c\/p\u003e\n\u003cp\u003eIf your application has significant vibration or pressure pulsation (as most piston compressors do), the liquid-filled gauges (*GL251430B or *GL251430U) are a better choice — the glycerin fill keeps the needle steady and extends mechanism life. The GF251430B is a dry gauge; if the existing gauge was liquid-filled and you want equivalent performance, match fill type as well as mount type.\u003c\/p\u003e\n\u003cp\u003eIf you are replacing a gauge on a Castair compressor and are not sure which variant was originally installed, call us. We can help you identify the correct replacement by the compressor model number.\u003c\/p\u003e\n\n\u003ch2\u003eWhat's in the Box\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e1 x Castair flanged-dial pressure gauge, 1\/4\" NPT bottom mount (GF251430B)\u003c\/li\u003e\n\u003cli\u003e1\/4\" NPT male fitting (bottom mount)\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eTechnical Specifications\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003ePart Number:\u003c\/strong\u003e GF251430B\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eConnection Size:\u003c\/strong\u003e 1\/4\" NPT\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMount:\u003c\/strong\u003e Bottom mount\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDial Style:\u003c\/strong\u003e Flanged\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDial Size:\u003c\/strong\u003e 2.5 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePressure Range:\u003c\/strong\u003e 0-300 PSI\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFill:\u003c\/strong\u003e Dry\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFrame:\u003c\/strong\u003e Steel\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWhy Buy From Air Compressor Factory Direct?\u003c\/h3\u003e\n\u003cp\u003eGetting the gauge right matters — wrong mount type and it will not fit; wrong pressure range and it reads inaccurately. We have specialized in Castair compressors and parts since 2016 and carry the full gauge lineup. Free shipping, free tech support at 866-217-0063, full manufacturer warranty on all Castair parts.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eCall 866-217-0063 for quick answers and help!\u003c\/strong\u003e\u003c\/p\u003e","brand":"Cast Air","offers":[{"title":"Default Title","offer_id":53342552686805,"sku":"GF251430B","price":78.1,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0622\/8466\/0949\/files\/PRESSURE-GAUGES-300x175.jpg?v=1772652699","url":"https:\/\/aircompressorfactorydirect.com\/products\/castair-pressure-gauge-1-4-npt-2-5-flanged-dial-0-300-psi-bottom-mount-gf251430b","provider":"Air Compressor Factory Direct","version":"1.0","type":"link"}