{"product_id":"electronic-expansion-valve-20010812-sxk-10-valve-body-coil-assembly-dc12v-1pc","title":"SXK-10 Electronic Expansion Valve Coil Assembly - DC12V, 1PC","description":"\u003cdiv class=\"product-description-container\" style=\"font-family: 'Segoe UI', Arial, sans-serif; line-height: 1.6; color: #333;\"\u003e\n\n    \u003cp\u003eThe \u003cstrong\u003eSXK-10 Electronic Expansion Valve (EEV) Coil Assembly\u003c\/strong\u003e is a precision-engineered \u003cstrong\u003estepper motor actuator\u003c\/strong\u003e designed for the high-accuracy regulation of refrigerant flow in HVAC and refrigeration systems. Operating on a \u003cstrong\u003eDC 12V\u003c\/strong\u003e power supply, this \u003cstrong\u003eSXK-10 coil\u003c\/strong\u003e translates electrical pulses from the system controller into mechanical rotation, precisely positioning the valve needle. Whether you are sourcing an \u003cstrong\u003eSXK-10 replacement\u003c\/strong\u003e for a VRF air conditioning system or a high-efficiency heat pump, this coil ensures optimal superheat control and energy-saving performance.\u003c\/p\u003e\n\n    \n\n    \u003chr style=\"border: 0; height: 1px; background: #eee; margin: 20px 0;\"\u003e\n\n    \u003ch3 style=\"color: #0056b3; border-left: 4px solid #16c8c8; padding-left: 12px; margin-top: 25px;\"\u003eTechnical Specifications\u003c\/h3\u003e\n    \u003cdiv style=\"overflow-x: auto;\"\u003e\n        \u003ctable style=\"width: 100%; border-collapse: collapse; margin-top: 15px; border: 1px solid #e1e1e1;\"\u003e\n            \u003cthead\u003e\n                \u003ctr style=\"background-color: #f4fcfc;\"\u003e\n                    \u003cth style=\"padding: 12px; border: 1px solid #e1e1e1; text-align: left;\"\u003eParameter\u003c\/th\u003e\n                    \u003cth style=\"padding: 12px; border: 1px solid #e1e1e1; text-align: left;\"\u003eDetails\u003c\/th\u003e\n                \u003c\/tr\u003e\n            \u003c\/thead\u003e\n            \u003ctbody\u003e\n                \u003ctr\u003e\n                    \u003ctd style=\"padding: 10px; border: 1px solid #e1e1e1; font-weight: bold;\"\u003eModel Number\u003c\/td\u003e\n                    \u003ctd style=\"padding: 10px; border: 1px solid #e1e1e1;\"\u003eSXK-10 Series\u003c\/td\u003e\n                \u003c\/tr\u003e\n                \u003ctr style=\"background-color: #fafafa;\"\u003e\n                    \u003ctd style=\"padding: 10px; border: 1px solid #e1e1e1; font-weight: bold;\"\u003eRated Voltage\u003c\/td\u003e\n                    \u003ctd style=\"padding: 10px; border: 1px solid #e1e1e1;\"\u003eDC 12V (±10%)\u003c\/td\u003e\n                \u003c\/tr\u003e\n                \u003ctr\u003e\n                    \u003ctd style=\"padding: 10px; border: 1px solid #e1e1e1; font-weight: bold;\"\u003eExcitation Method\u003c\/td\u003e\n                    \u003ctd style=\"padding: 10px; border: 1px solid #e1e1e1;\"\u003e1-2 Phase Excitation (4-Phase 8-Step)\u003c\/td\u003e\n                \u003c\/tr\u003e\n                \u003ctr style=\"background-color: #fafafa;\"\u003e\n                    \u003ctd style=\"padding: 10px; border: 1px solid #e1e1e1; font-weight: bold;\"\u003eCoil Resistance\u003c\/td\u003e\n                    \u003ctd style=\"padding: 10px; border: 1px solid #e1e1e1;\"\u003eApprox. 46Ω ± 10% (at 20°C)\u003c\/td\u003e\n                \u003c\/tr\u003e\n                \u003ctr\u003e\n                    \u003ctd style=\"padding: 10px; border: 1px solid #e1e1e1; font-weight: bold;\"\u003eInsulation Class\u003c\/td\u003e\n                    \u003ctd style=\"padding: 10px; border: 1px solid #e1e1e1;\"\u003eClass E (Encapsulated Synthetic Resin)\u003c\/td\u003e\n                \u003c\/tr\u003e\n                \u003ctr style=\"background-color: #fafafa;\"\u003e\n                    \u003ctd style=\"padding: 10px; border: 1px solid #e1e1e1; font-weight: bold;\"\u003eApplication\u003c\/td\u003e\n                    \u003ctd style=\"padding: 10px; border: 1px solid #e1e1e1;\"\u003eCommercial AC, Heat Pumps, Chillers\u003c\/td\u003e\n                \u003c\/tr\u003e\n            \u003c\/tbody\u003e\n        \u003c\/table\u003e\n    \u003c\/div\u003e\n\n    \u003ch3 style=\"color: #0056b3; border-left: 4px solid #16c8c8; padding-left: 12px; margin-top: 30px;\"\u003eDynamic Flow Control \u0026amp; Efficiency\u003c\/h3\u003e\n    \u003cp\u003eThe \u003cstrong\u003eSXK-10 stepper coil\u003c\/strong\u003e is the critical interface between the digital controller and the physical refrigeration cycle. By providing micro-step movements, it allows the valve to react to rapid load changes, maintaining a constant superheat level at the evaporator outlet. As a high-performance \u003cstrong\u003eHVAC automation part\u003c\/strong\u003e, the coil is hermetically sealed to resist moisture and vibration, making it a dependable \u003cstrong\u003erepair part\u003c\/strong\u003e for maintaining the Seasonal Energy Efficiency Ratio (SEER) of modern cooling systems. Replacing a degraded coil restores the valve's ability to \"park\" correctly, preventing refrigerant leakage during standby.\u003c\/p\u003e\n\n    \u003cdiv class=\"koeed-tool-container\" style=\"margin: 40px 0; padding: 25px; border: 2px solid #16c8c8; border-radius: 8px; background-color: #f9fbfc;\"\u003e\n        \u003ch3 style=\"color: #0056b3; margin-top: 0;\"\u003e🛠️ SXK-10 EEV Pulse \u0026amp; Flow Simulator\u003c\/h3\u003e\n        \u003cp style=\"font-size: 14px;\"\u003eSimulate how the DC 12V pulse count (Steps) dictates the valve opening and cooling capacity.\u003c\/p\u003e\n        \n        \u003cdiv style=\"margin-bottom: 15px;\"\u003e\n            \u003clabel style=\"display: block; font-weight: bold; margin-bottom: 5px;\"\u003eController Output (Steps: 0 - 500):\u003c\/label\u003e\n            \u003cinput type=\"range\" id=\"pulseSteps\" min=\"0\" max=\"500\" step=\"5\" value=\"100\" style=\"width: 100%; cursor: pointer;\"\u003e\n            \u003cdiv style=\"display: flex; justify-content: space-between; font-size: 12px;\"\u003e\n\u003cspan\u003e0 (Closed)\u003c\/span\u003e\u003cspan\u003e250 (Mid)\u003c\/span\u003e\u003cspan\u003e500 (Max)\u003c\/span\u003e\n\u003c\/div\u003e\n        \u003c\/div\u003e\n\n        \u003cdiv style=\"display: grid; grid-template-columns: 1fr 1fr; gap: 20px; margin-top: 20px;\"\u003e\n            \u003cdiv style=\"padding: 15px; background: #fff; border: 1px solid #ddd; border-radius: 4px; text-align: center;\"\u003e\n                \u003cstrong style=\"color: #333;\"\u003eValve Opening\u003c\/strong\u003e\n                \u003cp style=\"font-size: 22px; margin: 10px 0; color: #0056b3;\"\u003e\u003cspan id=\"openingPerc\"\u003e20\u003c\/span\u003e %\u003c\/p\u003e\n                \u003csmall style=\"color: #777;\"\u003eLinear Positioning\u003c\/small\u003e\n            \u003c\/div\u003e\n            \u003cdiv style=\"padding: 15px; background: #fff; border: 1px solid #16c8c8; border-radius: 4px; text-align: center;\"\u003e\n                \u003cstrong style=\"color: #333;\"\u003eFlow Capacity\u003c\/strong\u003e\n                \u003cp style=\"font-size: 22px; margin: 10px 0; color: #16c8c8;\"\u003e\u003cspan id=\"flowRate\"\u003eLow\u003c\/span\u003e\u003c\/p\u003e\n                \u003csmall style=\"color: #777;\"\u003eRefrigerant Volume\u003c\/small\u003e\n            \u003c\/div\u003e\n        \u003c\/div\u003e\n        \n        \u003cdiv id=\"eevAlert\" style=\"margin-top: 15px; padding: 10px; font-size: 13px; font-weight: bold; text-align: center; border-radius: 4px; background: #e3f2fd; color: #0d47a1;\"\u003e\n            Recommendation: Calibrate controller to zero-position before coil installation.\n        \u003c\/div\u003e\n    \u003c\/div\u003e\n\n    \u003ch3 style=\"color: #0056b3; border-left: 4px solid #16c8c8; padding-left: 12px; margin-top: 30px;\"\u003eSXK-10 Troubleshooting FAQ\u003c\/h3\u003e\n    \u003cul style=\"padding-left: 20px;\"\u003e\n        \u003cli\u003e\n\u003cstrong\u003eValve fails to move or makes a \"clicking\" noise?\u003c\/strong\u003e This is often a sign of a \u003cstrong\u003estuck valve needle\u003c\/strong\u003e or an open circuit in one of the 4 phases of the \u003cstrong\u003eSXK-10 coil\u003c\/strong\u003e. Use an ohmmeter to measure the resistance between the common wire and each phase. If any reading is infinite, the coil is burnt. If the resistance is normal (approx. 46Ω), the mechanical valve body may be contaminated with debris or oil sludge.\u003c\/li\u003e\n        \u003cli\u003e\n\u003cstrong\u003eErratic superheat readings or freezing at the evaporator?\u003c\/strong\u003e If the controller is sending pulses but the \u003cstrong\u003e12V coil\u003c\/strong\u003e has weakened magnetic force (due to heat degradation), it may miss steps. This leads to an incorrect valve position. Check for moisture ingress in the connector, which can cause intermittent shorts between the phase wires.\u003c\/li\u003e\n        \u003cli\u003e\n\u003cstrong\u003eHow to verify coil power?\u003c\/strong\u003e During system startup, the controller usually sends a full range of pulses to calibrate the valve. Use a multimeter to detect \u003cstrong\u003e12V DC pulses\u003c\/strong\u003e at the connector pins. Note that because these are fast pulses, an analog meter or an oscilloscope is preferred over a standard digital multimeter to see the voltage toggling.\u003c\/li\u003e\n    \u003c\/ul\u003e\n\n\u003c\/div\u003e\n\n\u003cscript\u003e\n    const pulseSteps = document.getElementById('pulseSteps');\n    const openingPerc = document.getElementById('openingPerc');\n    const flowRate = document.getElementById('flowRate');\n    const eevAlert = document.getElementById('eevAlert');\n\n    function updateEEVSim() {\n        const steps = parseInt(pulseSteps.value);\n        const percentage = (steps \/ 500) * 100;\n        \n        openingPerc.innerText = Math.round(percentage);\n        \n        if (percentage === 0) {\n            flowRate.innerText = \"Shut-off\";\n            flowRate.style.color = \"#d32f2f\";\n            eevAlert.innerText = \"Status: Valve fully closed. No cooling output.\";\n            eevAlert.style.backgroundColor = \"#ffebee\";\n            eevAlert.style.color = \"#c62828\";\n        } else if (percentage \u003c 30) {\n            flowRate.innerText = \"Precision\";\n            flowRate.style.color = \"#ef6c00\";\n            eevAlert.innerText = \"Status: Low load modulation (Ideal for standby).\";\n            eevAlert.style.backgroundColor = \"#fff3e0\";\n            eevAlert.style.color = \"#ef6c00\";\n        } else if (percentage \u003c 85) {\n            flowRate.innerText = \"Standard\";\n            flowRate.style.color = \"#2e7d32\";\n            eevAlert.innerText = \"Status: Optimal operating range for peak efficiency.\";\n            eevAlert.style.backgroundColor = \"#e8f5e9\";\n            eevAlert.style.color = \"#2e7d32\";\n        } else {\n            flowRate.innerText = \"Full Open\";\n            flowRate.style.color = \"#0056b3\";\n            eevAlert.innerText = \"Status: Maximum mass flow. Cooling capacity at 100%.\";\n            eevAlert.style.backgroundColor = \"#e3f2fd\";\n            eevAlert.style.color = \"#0d47a1\";\n        }\n    }\n\n    pulseSteps.addEventListener('input', updateEEVSim);\n    updateEEVSim();\n\u003c\/script\u003e","brand":"KOEED","offers":[{"title":"Default Title","offer_id":43943865647289,"sku":"305207180302","price":277.04,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0268\/8476\/7929\/files\/s-l1600_7725fc06-fbe9-4f31-add4-993c8e63020b.jpg?v=1713105070","url":"https:\/\/koeed.com\/products\/electronic-expansion-valve-20010812-sxk-10-valve-body-coil-assembly-dc12v-1pc","provider":"KOEED","version":"1.0","type":"link"}