{"product_id":"emerson-xc-726-hc-2b-thermal-expansion-valve","title":"Emerson Thermal Expansion Valve XC-726 HC-2B","description":"\u003c!-- Koeed Product Description: Emerson XC-726 HC-2B --\u003e\n\u003cdiv style=\"font-family: 'Segoe UI', Arial, sans-serif; color: #333; line-height: 1.6; width: 100%;\"\u003e\n\n  \u003c!-- SEO Introduction --\u003e\n  \u003csection style=\"margin-bottom: 30px;\"\u003e\n    \u003ch2 style=\"color: #0056b3; border-bottom: 2px solid #16c8c8; padding-bottom: 10px;\"\u003eEmerson Thermal Expansion Valve XC-726 HC-2B\u003c\/h2\u003e\n    \u003cp\u003e\n      The \u003cstrong\u003eEmerson XC-726 HC-2B\u003c\/strong\u003e is a heavy-duty, replaceable-element thermal expansion valve designed for large-capacity refrigeration, air conditioning, and heat pump systems. Featuring a rugged stainless steel power assembly, the \u003cstrong\u003eXC-726 series\u003c\/strong\u003e ensures stable superheat control even under fluctuating load conditions.\n    \u003c\/p\u003e\n    \u003cp\u003e\n      As a critical component in \u003cstrong\u003eindustrial chillers\u003c\/strong\u003e and \u003cstrong\u003ecold storage automation\u003c\/strong\u003e, the HC-2B valve body paired with the XC-726 power head provides precise refrigerant flow modulation. Key industry keywords: \u003cem\u003eEmerson TXV, Thermal Expansion Valve, XC-726 Power Head, HC-2B Valve Body, Superheat Adjustment, Refrigeration Control.\u003c\/em\u003e\n    \u003c\/p\u003e\n  \u003c\/section\u003e\n\n  \u003c!-- Technical Specifications --\u003e\n  \u003csection style=\"margin-bottom: 30px;\"\u003e\n    \u003ch3 style=\"color: #0056b3;\"\u003eTechnical Specifications\u003c\/h3\u003e\n    \u003cdiv style=\"overflow-x: auto;\"\u003e\n      \u003ctable style=\"width: 100%; border-collapse: collapse; min-width: 600px;\"\u003e\n        \u003cthead\u003e\n          \u003ctr style=\"background-color: #16c8c8; color: white;\"\u003e\n            \u003cth style=\"padding: 12px; text-align: left;\"\u003eComponent \/ Parameter\u003c\/th\u003e\n            \u003cth style=\"padding: 12px; text-align: left;\"\u003eTechnical Details\u003c\/th\u003e\n          \u003c\/tr\u003e\n        \u003c\/thead\u003e\n        \u003ctbody\u003e\n          \u003ctr style=\"background-color: #f4fcfc;\"\u003e\n            \u003ctd style=\"padding: 10px; border: 1px solid #eee;\"\u003e\u003cstrong\u003ePower Head Model\u003c\/strong\u003e\u003c\/td\u003e\n            \u003ctd style=\"padding: 10px; border: 1px solid #eee;\"\u003eXC-726 (Stainless Steel Diaphragm)\u003c\/td\u003e\n          \u003c\/tr\u003e\n          \u003ctr style=\"background-color: #fafafa;\"\u003e\n            \u003ctd style=\"padding: 10px; border: 1px solid #eee;\"\u003e\u003cstrong\u003eValve Body Model\u003c\/strong\u003e\u003c\/td\u003e\n            \u003ctd style=\"padding: 10px; border: 1px solid #eee;\"\u003eHC-2B (Solder Connection)\u003c\/td\u003e\n          \u003c\/tr\u003e\n          \u003ctr style=\"background-color: #f4fcfc;\"\u003e\n            \u003ctd style=\"padding: 10px; border: 1px solid #eee;\"\u003e\u003cstrong\u003eRefrigerant Compatibility\u003c\/strong\u003e\u003c\/td\u003e\n            \u003ctd style=\"padding: 10px; border: 1px solid #eee;\"\u003eR-22, R-407C, R-134a, R-404A (Depending on charge)\u003c\/td\u003e\n          \u003c\/tr\u003e\n          \u003ctr style=\"background-color: #fafafa;\"\u003e\n            \u003ctd style=\"padding: 10px; border: 1px solid #eee;\"\u003e\u003cstrong\u003eEqualization\u003c\/strong\u003e\u003c\/td\u003e\n            \u003ctd style=\"padding: 10px; border: 1px solid #eee;\"\u003eExternal Equalization (1\/4\" ODF)\u003c\/td\u003e\n          \u003c\/tr\u003e\n          \u003ctr style=\"background-color: #f4fcfc;\"\u003e\n            \u003ctd style=\"padding: 10px; border: 1px solid #eee;\"\u003e\u003cstrong\u003eMax Working Pressure\u003c\/strong\u003e\u003c\/td\u003e\n            \u003ctd style=\"padding: 10px; border: 1px solid #eee;\"\u003e450 psig (31 bar)\u003c\/td\u003e\n          \u003c\/tr\u003e\n          \u003ctr style=\"background-color: #fafafa;\"\u003e\n            \u003ctd style=\"padding: 10px; border: 1px solid #eee;\"\u003e\u003cstrong\u003eApplication Range\u003c\/strong\u003e\u003c\/td\u003e\n            \u003ctd style=\"padding: 10px; border: 1px solid #eee;\"\u003e-40°F to +50°F (Evaporating Temp)\u003c\/td\u003e\n          \u003c\/tr\u003e\n        \u003c\/tbody\u003e\n      \u003c\/table\u003e\n    \u003c\/div\u003e\n  \u003c\/section\u003e\n\n  \u003c!-- Application \u0026 Reliability --\u003e\n  \u003csection style=\"margin-bottom: 30px;\"\u003e\n    \u003ch3 style=\"color: #0056b3;\"\u003eApplication \u0026amp; Reliability\u003c\/h3\u003e\n    \u003cp\u003e\n      The \u003cstrong\u003eEmerson XC series\u003c\/strong\u003e is renowned for its modularity. The HC-2B valve body allows for easy maintenance without de-brazing the entire line, as the internal cage and power head (XC-726) can be replaced independently. \n    \u003c\/p\u003e\n    \u003cul style=\"list-style-type: square; padding-left: 20px;\"\u003e\n      \u003cli\u003e\n\u003cstrong\u003ePrecise Modulation:\u003c\/strong\u003e Large diaphragm area provides high force to overcome high pressure drops, ensuring stable evaporator feeding.\u003c\/li\u003e\n      \u003cli\u003e\n\u003cstrong\u003eCorrosion Resistance:\u003c\/strong\u003e Stainless steel power assembly protects against harsh industrial environments and moisture.\u003c\/li\u003e\n      \u003cli\u003e\n\u003cstrong\u003eSystem Safety:\u003c\/strong\u003e Prevents liquid slugging of the compressor by maintaining optimal superheat levels.\u003c\/li\u003e\n    \u003c\/ul\u003e\n  \u003c\/section\u003e\n\n  \u003c!-- Koeed B2B Tool: Superheat Analysis \u0026 Adjustment Guide --\u003e\n  \u003csection style=\"margin-bottom: 30px; padding: 20px; background-color: #f0fafa; border-radius: 8px; border-left: 5px solid #16c8c8;\"\u003e\n    \u003ch3 style=\"color: #0056b3; margin-top: 0;\"\u003eKoeed FAE Tool: TXV Superheat Calculator\u003c\/h3\u003e\n    \u003cp style=\"font-size: 0.9em;\"\u003eInput your gauge readings to determine if the XC-726 needs adjustment.\u003c\/p\u003e\n    \n    \u003cdiv style=\"display: grid; grid-template-columns: 1fr 1fr; gap: 15px; margin-bottom: 15px;\"\u003e\n      \u003cdiv\u003e\n        \u003clabel style=\"display: block; font-weight: bold; margin-bottom: 5px;\"\u003eSuction Temp (°C):\u003c\/label\u003e\n        \u003cinput type=\"number\" id=\"suctionTemp\" value=\"10\" step=\"0.1\" style=\"width: 100%; padding: 8px; border: 1px solid #ccc; border-radius: 4px;\"\u003e\n      \u003c\/div\u003e\n      \u003cdiv\u003e\n        \u003clabel style=\"display: block; font-weight: bold; margin-bottom: 5px;\"\u003eSaturation Temp (°C):\u003c\/label\u003e\n        \u003cinput type=\"number\" id=\"satTemp\" value=\"4\" step=\"0.1\" style=\"width: 100%; padding: 8px; border: 1px solid #ccc; border-radius: 4px;\"\u003e\n      \u003c\/div\u003e\n    \u003c\/div\u003e\n    \n    \u003cdiv style=\"background: white; padding: 15px; border-radius: 4px; text-align: center; border: 1px dashed #16c8c8; margin-bottom: 15px;\"\u003e\n      \u003cspan style=\"font-size: 0.9em; color: #666;\"\u003eCurrent Superheat:\u003c\/span\u003e\u003cbr\u003e\n      \u003cstrong style=\"font-size: 1.5em; color: #0056b3;\"\u003e\u003cspan id=\"shValue\"\u003e6.00\u003c\/span\u003e K\u003c\/strong\u003e\n    \u003c\/div\u003e\n\n    \u003cdiv id=\"actionBox\" style=\"padding: 10px; border-radius: 4px; font-weight: bold; text-align: center; background-color: #e8f5e9; color: #2e7d32;\"\u003e\n      Status: Optimal Range (5K - 8K)\n    \u003c\/div\u003e\n\n    \u003cscript\u003e\n      const sTemp = document.getElementById('suctionTemp');\n      const satTemp = document.getElementById('satTemp');\n      const shValue = document.getElementById('shValue');\n      const actionBox = document.getElementById('actionBox');\n\n      function calculateSH() {\n        const t1 = parseFloat(sTemp.value) || 0;\n        const t2 = parseFloat(satTemp.value) || 0;\n        const sh = t1 - t2;\n        shValue.innerText = sh.toFixed(2);\n\n        if (sh \u003c 4) {\n          actionBox.innerText = \"ACTION: Too Low! Turn Stem CLOCKWISE (In) to Increase Superheat.\";\n          actionBox.style.backgroundColor = \"#ffebee\";\n          actionBox.style.color = \"#c62828\";\n        } else if (sh \u003e 9) {\n          actionBox.innerText = \"ACTION: Too High! Turn Stem COUNTER-CLOCKWISE (Out) to Decrease Superheat.\";\n          actionBox.style.backgroundColor = \"#fff3e0\";\n          actionBox.style.color = \"#ef6c00\";\n        } else {\n          actionBox.innerText = \"STATUS: Optimal Range for XC-726 Operation.\";\n          actionBox.style.backgroundColor = \"#e8f5e9\";\n          actionBox.style.color = \"#2e7d32\";\n        }\n      }\n\n      sTemp.addEventListener('input', calculateSH);\n      satTemp.addEventListener('input', calculateSH);\n    \u003c\/script\u003e\n  \u003c\/section\u003e\n\n  \u003c!-- Troubleshooting FAQ --\u003e\n  \u003csection\u003e\n    \u003ch3 style=\"color: #0056b3;\"\u003eTroubleshooting FAQ\u003c\/h3\u003e\n    \u003cdiv style=\"margin-bottom: 15px;\"\u003e\n      \u003cp style=\"font-weight: bold; color: #16c8c8; margin-bottom: 5px;\"\u003eQ1: Frost forming on the XC-726 power head body?\u003c\/p\u003e\n      \u003cp style=\"margin-top: 0; font-size: 0.95em;\"\u003eThis often indicates the valve is \"hunting\" or sticking. Verify the external equalizer line is connected to the top of the suction line and is not restricted by oil or debris.\u003c\/p\u003e\n    \u003c\/div\u003e\n    \u003cdiv style=\"margin-bottom: 15px;\"\u003e\n      \u003cp style=\"font-weight: bold; color: #16c8c8; margin-bottom: 5px;\"\u003eQ2: System cannot reach low temperature despite TXV adjustment?\u003c\/p\u003e\n      \u003cp style=\"margin-top: 0; font-size: 0.95em;\"\u003eThe HC-2B internal cage may be undersized for the current load, or the XC-726 power head has lost its charge. Check the bulb temperature vs. suction pressure; if they don't correlate, replace the power head.\u003c\/p\u003e\n    \u003c\/div\u003e\n    \u003cdiv style=\"margin-bottom: 15px;\"\u003e\n      \u003cp style=\"font-weight: bold; color: #16c8c8; margin-bottom: 5px;\"\u003eQ3: Excessive noise\/whistling at the valve body?\u003c\/p\u003e\n      \u003cp style=\"margin-top: 0; font-size: 0.95em;\"\u003eThis is usually caused by flash gas in the liquid line. Ensure there is a full sight glass of liquid refrigerant before the TXV inlet. Check the liquid line filter-drier for a pressure drop.\u003c\/p\u003e\n    \u003c\/div\u003e\n  \u003c\/section\u003e\n\n\u003c\/div\u003e","brand":"EMERSON","offers":[{"title":"Default Title","offer_id":44246885695673,"sku":"166333343202","price":277.96,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0268\/8476\/7929\/files\/s-l1600_8a30ae24-c564-4c71-ad8b-8d9ddc9ace10.png?v=1723712020","url":"https:\/\/koeed.com\/ko\/products\/emerson-xc-726-hc-2b-thermal-expansion-valve","provider":"KOEED","version":"1.0","type":"link"}