{"product_id":"dpf-scrf-sic-ceramic-diesel-particulate-filter-158mm-6-22","title":"DPF\/SCRF SiC Ceramic Diesel Particulate Filter 158mm (6.22\")","description":"\u003cstyle\u003e\n  .cat-faq-module {\n    max-width: 100%;\n    margin: 30px 0;\n    font-family: 'Segoe UI', Roboto, Arial, sans-serif;\n    background: #ffffff;\n    border-radius: 28px;\n    box-shadow: 0 8px 30px rgba(0, 0, 0, 0.06);\n    border: 1px solid #edf2f7;\n    padding: 30px 32px 10px 32px;\n    box-sizing: border-box;\n  }\n  .cat-faq-module .module-header {\n    display: flex;\n    align-items: center;\n    gap: 14px;\n    padding-bottom: 18px;\n    border-bottom: 3px solid #f0f4fa;\n    margin-bottom: 20px;\n  }\n  .cat-faq-module .module-header h2 {\n    font-size: 28px;\n    font-weight: 700;\n    color: #0b1a33;\n    margin: 0;\n    letter-spacing: -0.3px;\n  }\n  .cat-faq-module .module-header .badge {\n    background: #0b1a33;\n    color: #fff;\n    font-size: 14px;\n    font-weight: 600;\n    padding: 2px 18px;\n    border-radius: 30px;\n    letter-spacing: 0.3px;\n  }\n  .cat-faq-module details {\n    display: block;\n    margin-bottom: 6px;\n    border-bottom: 1px solid #eef2f6;\n    padding: 8px 0;\n    transition: all 0.2s ease;\n  }\n  .cat-faq-module details:last-of-type {\n    border-bottom: none;\n  }\n  .cat-faq-module summary {\n    display: flex;\n    align-items: center;\n    cursor: pointer;\n    font-size: 17px;\n    font-weight: 600;\n    color: #0b1a33;\n    padding: 10px 4px 10px 0;\n    list-style: none;\n    position: relative;\n    user-select: none;\n    gap: 12px;\n  }\n  .cat-faq-module summary::-webkit-details-marker {\n    display: none;\n  }\n  .cat-faq-module summary::before {\n    content: \"▶\";\n    font-size: 14px;\n    color: #1a73e8;\n    transition: transform 0.25s ease;\n    display: inline-block;\n    width: 20px;\n    font-weight: 400;\n  }\n  .cat-faq-module details[open] \u003e summary::before {\n    transform: rotate(90deg);\n  }\n  .cat-faq-module summary .q-mark {\n    background: #eef5ff;\n    color: #1a73e8;\n    font-weight: 700;\n    font-size: 14px;\n    padding: 0 12px;\n    border-radius: 20px;\n    line-height: 26px;\n  }\n  .cat-faq-module .answer-wrap {\n    padding: 8px 20px 16px 36px;\n    color: #2c3e50;\n    font-size: 15.5px;\n    line-height: 1.75;\n  }\n  .cat-faq-module .answer-wrap p {\n    margin: 0 0 12px 0;\n  }\n  .cat-faq-module .answer-wrap p:last-child {\n    margin-bottom: 0;\n  }\n  .cat-faq-module .answer-wrap ul, \n  .cat-faq-module .answer-wrap ol {\n    padding-left: 22px;\n    margin: 6px 0 12px 0;\n  }\n  .cat-faq-module .answer-wrap li {\n    margin-bottom: 4px;\n  }\n  .cat-faq-module .answer-wrap strong {\n    color: #0b1a33;\n  }\n  .cat-faq-module .warning-box {\n    background: #f9fcff;\n    border-left: 5px solid #1a73e8;\n    padding: 14px 22px;\n    border-radius: 12px;\n    margin: 12px 0 4px 0;\n    font-size: 15px;\n  }\n  .cat-faq-module table {\n    width: 100%;\n    border-collapse: collapse;\n    font-size: 14.5px;\n    margin: 12px 0;\n  }\n  .cat-faq-module table th,\n  .cat-faq-module table td {\n    border: 1px solid #dce1e9;\n    padding: 10px 8px;\n    text-align: left;\n    vertical-align: middle;\n  }\n  .cat-faq-module table th {\n    background: #f0f4fa;\n  }\n  .cat-faq-module .contact-item {\n    margin-bottom: 10px;\n    padding-left: 4px;\n  }\n  .cat-faq-module .contact-item strong {\n    display: inline-block;\n    min-width: 60px;\n  }\n  @media (max-width: 640px) {\n    .cat-faq-module { padding: 18px 16px 6px 16px; }\n    .cat-faq-module .module-header h2 { font-size: 22px; }\n    .cat-faq-module summary { font-size: 15px; }\n    .cat-faq-module .answer-wrap { padding: 6px 8px 12px 20px; font-size: 14.5px; }\n    .cat-faq-module table { font-size: 13px; }\n    .cat-faq-module table th, .cat-faq-module table td { padding: 6px 4px; }\n  }\n\u003c\/style\u003e\n\n\u003cdiv class=\"cat-faq-module\"\u003e\n  \u003cdiv class=\"module-header\"\u003e\n    \u003ch2\u003e Product Description \u003c\/h2\u003e\n    \u003cspan class=\"badge\"\u003eClick to expand\u003c\/span\u003e\n  \u003c\/div\u003e\n\n  \u003c!-- Q1 – 什么是SDPF\/SCRF --\u003e\n  \u003cdetails\u003e\n    \u003csummary\u003e\u003cspan class=\"q-mark\"\u003eQ1\u003c\/span\u003e What is SDPF \/ SCRF?\u003c\/summary\u003e\n    \u003cdiv class=\"answer-wrap\"\u003e\n      \u003cp\u003e\u003cstrong\u003eSDPF\u003c\/strong\u003e (Selective Catalytic Reduction Filter) or \u003cstrong\u003eSCRF\u003c\/strong\u003e (SCR on Filter) is an integrated after‑treatment device that combines a DPF (Diesel Particulate Filter) with an SCR (Selective Catalytic Reduction) catalyst coating on the same substrate. This configuration simultaneously removes particulate matter (soot) and reduces NO\u003csub\u003ex\u003c\/sub\u003e emissions.\u003c\/p\u003e\n      \u003cp\u003e\u003cstrong\u003eStructure and operating principle:\u003c\/strong\u003e\u003c\/p\u003e\n      \u003cul\u003e\n        \u003cli\u003eThe SCRF is positioned close to the engine outlet (tight‑coupled) to reach urea decomposition temperature and SCR light‑off temperature quickly, avoiding excessive NO\u003csub\u003ex\u003c\/sub\u003e emissions during cold starts.\u003c\/li\u003e\n        \u003cli\u003eUrea is injected upstream of the SCRF; the generated NH\u003csub\u003e3\u003c\/sub\u003e reacts with NO\u003csub\u003ex\u003c\/sub\u003e over the SCR catalyst layer, while the filter walls trap soot.\u003c\/li\u003e\n        \u003cli\u003eAt low temperatures (below 200°C), urea decomposition is incomplete and NO\u003csub\u003e2\u003c\/sub\u003e conversion is limited. The tight‑coupled SCRF overcomes this by achieving faster warm‑up.\u003c\/li\u003e\n        \u003cli\u003eA downstream under‑floor SCR catalyst (with higher catalyst loading) provides additional NO\u003csub\u003ex\u003c\/sub\u003e conversion during normal driving. Some heavy‑duty systems also include a small auxiliary SCR with an ASC (Ammonia Slip Catalyst) to control excess NH\u003csub\u003e3\u003c\/sub\u003e.\u003c\/li\u003e\n        \u003cli\u003eNO\u003csub\u003ex\u003c\/sub\u003e sensors upstream of the DOC and downstream of the SCRF are used to control urea dosing and monitor SCRF performance.\u003c\/li\u003e\n      \u003c\/ul\u003e\n      \u003cp\u003eThis layout (DOC + SCRF close‑coupled + under‑floor SCR) is typical for modern Euro 6 heavy‑duty diesel engines.\u003c\/p\u003e\n    \u003c\/div\u003e\n  \u003c\/details\u003e\n\n  \u003c!-- Q2 – SDPF和DPF之间的区别 --\u003e\n  \u003cdetails\u003e\n    \u003csummary\u003e\u003cspan class=\"q-mark\"\u003eQ2\u003c\/span\u003e Difference between SDPF (SCRF) and DPF?\u003c\/summary\u003e\n    \u003cdiv class=\"answer-wrap\"\u003e\n      \u003cp\u003eAlthough both are wall‑flow ceramic filters, SDPF (SCRF) and DPF differ significantly in design and function:\u003c\/p\u003e\n      \u003ctable\u003e\n        \u003cthead\u003e\n          \u003ctr\u003e\n            \u003cth\u003eFeature\u003c\/th\u003e\n            \u003cth\u003eSDPF \/ SCRF\u003c\/th\u003e\n            \u003cth\u003eDPF\u003c\/th\u003e\n          \u003c\/tr\u003e\n        \u003c\/thead\u003e\n        \u003ctbody\u003e\n          \u003ctr\u003e\n            \u003ctd\u003e\u003cstrong\u003ePrimary function\u003c\/strong\u003e\u003c\/td\u003e\n            \u003ctd\u003eSimultaneous particulate filtration and NO\u003csub\u003ex\u003c\/sub\u003e reduction (SCR)\u003c\/td\u003e\n            \u003ctd\u003eOnly particulate filtration\u003c\/td\u003e\n          \u003c\/tr\u003e\n          \u003ctr\u003e\n            \u003ctd\u003e\u003cstrong\u003eCatalytic coating\u003c\/strong\u003e\u003c\/td\u003e\n            \u003ctd\u003eContains SCR catalyst (e.g., Cu‑zeolite) with precious metals\u003c\/td\u003e\n            \u003ctd\u003eTypically uncoated or only catalysed for soot oxidation\u003c\/td\u003e\n          \u003c\/tr\u003e\n          \u003ctr\u003e\n            \u003ctd\u003e\u003cstrong\u003ePorosity\u003c\/strong\u003e\u003c\/td\u003e\n            \u003ctd\u003eHigher porosity (typically \u0026gt; 50%) to allow SCR coating penetration and to maintain low backpressure\u003c\/td\u003e\n            \u003ctd\u003eLower porosity (typically 40‑50%)\u003c\/td\u003e\n          \u003c\/tr\u003e\n          \u003ctr\u003e\n            \u003ctd\u003e\u003cstrong\u003eUrea injection\u003c\/strong\u003e\u003c\/td\u003e\n            \u003ctd\u003eRequires urea dosing upstream\u003c\/td\u003e\n            \u003ctd\u003eNo urea required\u003c\/td\u003e\n          \u003c\/tr\u003e\n          \u003ctr\u003e\n            \u003ctd\u003e\u003cstrong\u003eNO\u003csub\u003ex\u003c\/sub\u003e conversion\u003c\/strong\u003e\u003c\/td\u003e\n            \u003ctd\u003eConverts NO\u003csub\u003ex\u003c\/sub\u003e to N\u003csub\u003e2\u003c\/sub\u003e using NH\u003csub\u003e3\u003c\/sub\u003e\n\u003c\/td\u003e\n            \u003ctd\u003eDoes not reduce NO\u003csub\u003ex\u003c\/sub\u003e\n\u003c\/td\u003e\n          \u003c\/tr\u003e\n          \u003ctr\u003e\n            \u003ctd\u003e\u003cstrong\u003eTypical application\u003c\/strong\u003e\u003c\/td\u003e\n            \u003ctd\u003eEuro 6 heavy‑duty and light‑duty diesel vehicles\u003c\/td\u003e\n            \u003ctd\u003eEuro 4\/5 vehicles, or as a stand‑alone filter\u003c\/td\u003e\n          \u003c\/tr\u003e\n          \u003ctr\u003e\n            \u003ctd\u003e\u003cstrong\u003eCost\u003c\/strong\u003e\u003c\/td\u003e\n            \u003ctd\u003eHigher due to coating and complex design\u003c\/td\u003e\n            \u003ctd\u003eLower\u003c\/td\u003e\n          \u003c\/tr\u003e\n        \u003c\/tbody\u003e\n      \u003c\/table\u003e\n      \u003cp\u003eThe key structural difference is that the SDPF\/SCRF has \u003cstrong\u003ehigher porosity\u003c\/strong\u003e to accommodate the SCR washcoat without excessively increasing backpressure.\u003c\/p\u003e\n    \u003c\/div\u003e\n  \u003c\/details\u003e\n\n  \u003c!-- Q3 – SDPF的示例图（根据图片用文字描述） --\u003e\n  \u003cdetails\u003e\n    \u003csummary\u003e\u003cspan class=\"q-mark\"\u003eQ3\u003c\/span\u003e Example performance diagram of SDPF\u003c\/summary\u003e\n    \u003cdiv class=\"answer-wrap\"\u003e\n      \u003cp\u003eThe following diagram illustrates the NO\u003csub\u003ex\u003c\/sub\u003e conversion efficiency of a close‑coupled SCRF system compared to an under‑floor SCR system, based on real test data.\u003c\/p\u003e\n      \u003ctable\u003e\n        \u003cthead\u003e\n          \u003ctr\u003e\n            \u003cth\u003eSystem\u003c\/th\u003e\n            \u003cth\u003eTemperature range\u003c\/th\u003e\n            \u003cth\u003eNO\u003csub\u003ex\u003c\/sub\u003e conversion efficiency\u003c\/th\u003e\n            \u003cth\u003eKey remarks\u003c\/th\u003e\n          \u003c\/tr\u003e\n        \u003c\/thead\u003e\n        \u003ctbody\u003e\n          \u003ctr\u003e\n            \u003ctd\u003e\n\u003cstrong\u003ecc‑SCRF\u003c\/strong\u003e (close‑coupled)\u003c\/td\u003e\n            \u003ctd\u003e200 – 400°C\u003c\/td\u003e\n            \u003ctd\u003eReaches ~80% at 250°C, exceeds 90% above 300°C\u003c\/td\u003e\n            \u003ctd\u003eFast light‑off, active during cold start and warm‑up\u003c\/td\u003e\n          \u003c\/tr\u003e\n          \u003ctr\u003e\n            \u003ctd\u003e\u003cstrong\u003eUnder‑floor main SCR\u003c\/strong\u003e\u003c\/td\u003e\n            \u003ctd\u003e300 – 600°C\u003c\/td\u003e\n            \u003ctd\u003eReaches ~80% only above 400°C\u003c\/td\u003e\n            \u003ctd\u003eHigher catalyst loading, but slower light‑off\u003c\/td\u003e\n          \u003c\/tr\u003e\n          \u003ctr\u003e\n            \u003ctd\u003e\u003cstrong\u003eAuxiliary small SCR (with ASC)\u003c\/strong\u003e\u003c\/td\u003e\n            \u003ctd\u003e200 – 450°C\u003c\/td\u003e\n            \u003ctd\u003eProvides additional NO\u003csub\u003ex\u003c\/sub\u003e conversion and ammonia slip control\u003c\/td\u003e\n            \u003ctd\u003eOften used in heavy‑duty vehicles\u003c\/td\u003e\n          \u003c\/tr\u003e\n        \u003c\/tbody\u003e\n      \u003c\/table\u003e\n      \u003cp\u003e\u003cstrong\u003eDiagram interpretation:\u003c\/strong\u003e\u003c\/p\u003e\n      \u003cul\u003e\n        \u003cli\u003eThe cc‑SCRF (solid curve) achieves high NO\u003csub\u003ex\u003c\/sub\u003e conversion (\u0026gt;80%) already at ~250°C, while the under‑floor SCR (dashed curve) reaches the same level only above 400°C.\u003c\/li\u003e\n        \u003cli\u003eTwo urea injection points are shown: one upstream of the cc‑SCRF and a second upstream of the under‑floor SCR (for heavy‑duty applications).\u003c\/li\u003e\n        \u003cli\u003eA small auxiliary SCR is placed downstream to handle residual NH\u003csub\u003e3\u003c\/sub\u003e.\u003c\/li\u003e\n        \u003cli\u003eNO\u003csub\u003ex\u003c\/sub\u003e sensors before and after the system enable precise urea dosing and performance monitoring.\u003c\/li\u003e\n      \u003c\/ul\u003e\n      \u003cp\u003eThis configuration ensures optimal NO\u003csub\u003ex\u003c\/sub\u003e reduction across the entire operating range, especially during transient conditions.\u003c\/p\u003e\n    \u003c\/div\u003e\n  \u003c\/details\u003e\n\n  \u003c!-- Q4 – SDPF\/SCRF 涂PT和不涂PT之间的区别 --\u003e\n  \u003cdetails\u003e\n    \u003csummary\u003e\u003cspan class=\"q-mark\"\u003eQ4\u003c\/span\u003e Difference between Pt‑coated and uncoated SDPF\/SCRF?\u003c\/summary\u003e\n    \u003cdiv class=\"answer-wrap\"\u003e\n      \u003cp\u003eThe coating of platinum (Pt) on the SDPF\/SCRF significantly affects performance, especially at low temperatures. Here is a detailed comparison:\u003c\/p\u003e\n      \u003ctable\u003e\n        \u003cthead\u003e\n          \u003ctr\u003e\n            \u003cth\u003eAspect\u003c\/th\u003e\n            \u003cth\u003ePt‑coated SDPF\/SCRF\u003c\/th\u003e\n            \u003cth\u003eUncoated SDPF\/SCRF\u003c\/th\u003e\n          \u003c\/tr\u003e\n        \u003c\/thead\u003e\n        \u003ctbody\u003e\n          \u003ctr\u003e\n            \u003ctd\u003e\u003cstrong\u003eNO oxidation\u003c\/strong\u003e\u003c\/td\u003e\n            \u003ctd\u003eEnables NO → NO\u003csub\u003e2\u003c\/sub\u003e conversion, improving low‑temperature SCR performance\u003c\/td\u003e\n            \u003ctd\u003eLimited NO oxidation; relies mainly on engine‑out NO\u003csub\u003e2\u003c\/sub\u003e\n\u003c\/td\u003e\n          \u003c\/tr\u003e\n          \u003ctr\u003e\n            \u003ctd\u003e\u003cstrong\u003eLow‑temperature activity\u003c\/strong\u003e\u003c\/td\u003e\n            \u003ctd\u003eHigher activity below 250°C due to faster NH\u003csub\u003e3\u003c\/sub\u003e activation and NO\u003csub\u003e2\u003c\/sub\u003e promotion\u003c\/td\u003e\n            \u003ctd\u003eLower activity; needs higher temperature for effective SCR\u003c\/td\u003e\n          \u003c\/tr\u003e\n          \u003ctr\u003e\n            \u003ctd\u003e\u003cstrong\u003eUrea decomposition\u003c\/strong\u003e\u003c\/td\u003e\n            \u003ctd\u003eSlightly improved due to local heat release from oxidation reactions\u003c\/td\u003e\n            \u003ctd\u003eNo such benefit\u003c\/td\u003e\n          \u003c\/tr\u003e\n          \u003ctr\u003e\n            \u003ctd\u003e\u003cstrong\u003ePassive regeneration\u003c\/strong\u003e\u003c\/td\u003e\n            \u003ctd\u003eEnhanced soot oxidation (due to NO\u003csub\u003e2\u003c\/sub\u003e) – lowers regeneration temperature\u003c\/td\u003e\n            \u003ctd\u003eHigher soot oxidation temperature, more active regeneration needed\u003c\/td\u003e\n          \u003c\/tr\u003e\n          \u003ctr\u003e\n            \u003ctd\u003e\u003cstrong\u003eDurability\u003c\/strong\u003e\u003c\/td\u003e\n            \u003ctd\u003ePt may suffer from sulfur poisoning and thermal ageing\u003c\/td\u003e\n            \u003ctd\u003eMore robust, no precious metal degradation\u003c\/td\u003e\n          \u003c\/tr\u003e\n          \u003ctr\u003e\n            \u003ctd\u003e\u003cstrong\u003eCost\u003c\/strong\u003e\u003c\/td\u003e\n            \u003ctd\u003eSignificantly more expensive\u003c\/td\u003e\n            \u003ctd\u003eLower cost\u003c\/td\u003e\n          \u003c\/tr\u003e\n          \u003ctr\u003e\n            \u003ctd\u003e\u003cstrong\u003eTypical application\u003c\/strong\u003e\u003c\/td\u003e\n            \u003ctd\u003eEuro 6d, cold‑start heavy‑duty, and vehicles with frequent low‑load operation\u003c\/td\u003e\n            \u003ctd\u003eEuro 5\/6 without extreme cold‑start demands\u003c\/td\u003e\n          \u003c\/tr\u003e\n        \u003c\/tbody\u003e\n      \u003c\/table\u003e\n      \u003cp\u003eIn summary, Pt coating greatly improves cold‑start NO\u003csub\u003ex\u003c\/sub\u003e reduction and passive regeneration, but adds cost and complexity. The choice depends on emission targets and operating conditions.\u003c\/p\u003e\n    \u003c\/div\u003e\n  \u003c\/details\u003e\n\n  \u003c!-- Q5 – 我们的SDPF\/SCRF使用的是什么SCR基材 --\u003e\n  \u003cdetails\u003e\n    \u003csummary\u003e\u003cspan class=\"q-mark\"\u003eQ5\u003c\/span\u003e Which SCR substrate material do we use?\u003c\/summary\u003e\n    \u003cdiv class=\"answer-wrap\"\u003e\n      \u003cp\u003eOur SDPF\/SCRF products use a \u003cstrong\u003ecopper‑based zeolite (Cu‑zeolite)\u003c\/strong\u003e as the SCR catalyst material.\u003c\/p\u003e\n      \u003cp\u003e\u003cstrong\u003eKey advantages of Cu‑zeolite SCR:\u003c\/strong\u003e\u003c\/p\u003e\n      \u003cul\u003e\n        \u003cli\u003e\n\u003cstrong\u003eExcellent low‑temperature activity:\u003c\/strong\u003e Effective even below 200°C, ideal for cold‑start and low‑load conditions.\u003c\/li\u003e\n        \u003cli\u003e\n\u003cstrong\u003eHigh hydrothermal durability:\u003c\/strong\u003e Withstands temperatures up to 650°C without significant degradation.\u003c\/li\u003e\n        \u003cli\u003e\n\u003cstrong\u003eGood resistance to sulfur poisoning\u003c\/strong\u003e compared to iron‑based zeolites.\u003c\/li\u003e\n        \u003cli\u003e\n\u003cstrong\u003eBroad operating window:\u003c\/strong\u003e Maintains high NO\u003csub\u003ex\u003c\/sub\u003e conversion from 200°C to 500°C.\u003c\/li\u003e\n        \u003cli\u003e\n\u003cstrong\u003eLower precious metal content\u003c\/strong\u003e than vanadium‑based systems, reducing cost.\u003c\/li\u003e\n      \u003c\/ul\u003e\n      \u003cp\u003eThis Cu‑zeolite coating is applied to the cordierite or silicon carbide DPF substrate (depending on the model) to provide both particulate filtration and SCR functionality in a single unit.\u003c\/p\u003e\n    \u003c\/div\u003e\n  \u003c\/details\u003e\n\n  \u003c!-- Q6 – SDPF\/SCRF的主要功能和工作原理是什么？ --\u003e\n  \u003cdetails\u003e\n    \u003csummary\u003e\u003cspan class=\"q-mark\"\u003eQ6\u003c\/span\u003e Main functions and working principle of SDPF\/SCRF\u003c\/summary\u003e\n    \u003cdiv class=\"answer-wrap\"\u003e\n      \u003cp\u003e\u003cstrong\u003eMain functions:\u003c\/strong\u003e\u003c\/p\u003e\n      \u003cul\u003e\n        \u003cli\u003e\n\u003cstrong\u003eParticulate filtration:\u003c\/strong\u003e Traps soot and ash particles from diesel exhaust, reducing PM emissions by \u0026gt; 90%.\u003c\/li\u003e\n        \u003cli\u003e\n\u003cstrong\u003eNO\u003csub\u003ex\u003c\/sub\u003e reduction:\u003c\/strong\u003e Converts nitrogen oxides (NO and NO₂) into harmless nitrogen (N₂) and water (H₂O) via selective catalytic reduction.\u003c\/li\u003e\n        \u003cli\u003e\n\u003cstrong\u003ePassive soot oxidation:\u003c\/strong\u003e Generates NO₂ from NO (with Pt coating) to oxidise trapped soot at lower temperatures, reducing regeneration frequency.\u003c\/li\u003e\n      \u003c\/ul\u003e\n      \u003cp\u003e\u003cstrong\u003eWorking principle (step‑by‑step):\u003c\/strong\u003e\u003c\/p\u003e\n      \u003col\u003e\n        \u003cli\u003e\n\u003cstrong\u003eExhaust gas enters the SCRF\u003c\/strong\u003e – containing NO, NO₂, soot, and other gaseous pollutants.\u003c\/li\u003e\n        \u003cli\u003e\n\u003cstrong\u003eUrea injection\u003c\/strong\u003e – AdBlue (urea‑water solution) is sprayed upstream; it decomposes into NH\u003csub\u003e3\u003c\/sub\u003e and CO₂.\u003c\/li\u003e\n        \u003cli\u003e\n\u003cstrong\u003eNH\u003csub\u003e3\u003c\/sub\u003e mixes with exhaust\u003c\/strong\u003e and flows into the SCRF channels.\u003c\/li\u003e\n        \u003cli\u003e\n\u003cstrong\u003eFiltration\u003c\/strong\u003e – The wall‑flow structure forces the gas through the porous walls, trapping soot on the inlet channels.\u003c\/li\u003e\n        \u003cli\u003e\n\u003cstrong\u003eSCR reaction\u003c\/strong\u003e – NH\u003csub\u003e3\u003c\/sub\u003e reacts with NO\u003csub\u003ex\u003c\/sub\u003e over the Cu‑zeolite catalyst layer on the filter walls, producing N₂ and H₂O.\u003c\/li\u003e\n        \u003cli\u003e\n\u003cstrong\u003eRegeneration\u003c\/strong\u003e – Accumulated soot is periodically burned off via passive oxidation (using NO₂) or active regeneration (raising exhaust temperature to ~600°C).\u003c\/li\u003e\n        \u003cli\u003e\n\u003cstrong\u003eClean gas exits\u003c\/strong\u003e – with significantly reduced particulate and NO\u003csub\u003ex\u003c\/sub\u003e emissions.\u003c\/li\u003e\n      \u003c\/ol\u003e\n      \u003cp\u003eThis integrated design saves space, reduces system complexity, and improves overall emission control efficiency compared to separate DPF + SCR units.\u003c\/p\u003e\n    \u003c\/div\u003e\n  \u003c\/details\u003e\n\n  \u003c!-- Q7 – 堇青石材质和碳化硅的区别？ --\u003e\n  \u003cdetails\u003e\n    \u003csummary\u003e\u003cspan class=\"q-mark\"\u003eQ7\u003c\/span\u003e Difference between cordierite and silicon carbide materials?\u003c\/summary\u003e\n    \u003cdiv class=\"answer-wrap\"\u003e\n      \u003cp\u003eBoth cordierite and silicon carbide (SiC) are used as DPF\/SCRF substrates. Their differences are summarized below:\u003c\/p\u003e\n      \u003ctable\u003e\n        \u003cthead\u003e\n          \u003ctr\u003e\n            \u003cth\u003eProperty\u003c\/th\u003e\n            \u003cth\u003eCordierite\u003c\/th\u003e\n            \u003cth\u003eSilicon Carbide (SiC)\u003c\/th\u003e\n          \u003c\/tr\u003e\n        \u003c\/thead\u003e\n        \u003ctbody\u003e\n          \u003ctr\u003e\n            \u003ctd\u003e\u003cstrong\u003eThermal conductivity\u003c\/strong\u003e\u003c\/td\u003e\n            \u003ctd\u003eLow (1–2 W\/mK)\u003c\/td\u003e\n            \u003ctd\u003eHigh (15–20 W\/mK)\u003c\/td\u003e\n          \u003c\/tr\u003e\n          \u003ctr\u003e\n            \u003ctd\u003e\u003cstrong\u003eThermal expansion coefficient\u003c\/strong\u003e\u003c\/td\u003e\n            \u003ctd\u003eVery low (~1.5×10⁻⁶\/℃)\u003c\/td\u003e\n            \u003ctd\u003eHigher (~4.0×10⁻⁶\/℃)\u003c\/td\u003e\n          \u003c\/tr\u003e\n          \u003ctr\u003e\n            \u003ctd\u003e\u003cstrong\u003eThermal shock resistance\u003c\/strong\u003e\u003c\/td\u003e\n            \u003ctd\u003eGood, but limited above 1000°C\u003c\/td\u003e\n            \u003ctd\u003eExcellent, withstands high thermal cycling\u003c\/td\u003e\n          \u003c\/tr\u003e\n          \u003ctr\u003e\n            \u003ctd\u003e\u003cstrong\u003eMaximum operating temperature\u003c\/strong\u003e\u003c\/td\u003e\n            \u003ctd\u003e~1200°C\u003c\/td\u003e\n            \u003ctd\u003e~1600°C\u003c\/td\u003e\n          \u003c\/tr\u003e\n          \u003ctr\u003e\n            \u003ctd\u003e\u003cstrong\u003ePorosity\u003c\/strong\u003e\u003c\/td\u003e\n            \u003ctd\u003eTypically 40–50%\u003c\/td\u003e\n            \u003ctd\u003eTypically 40–50% (can be tailored)\u003c\/td\u003e\n          \u003c\/tr\u003e\n          \u003ctr\u003e\n            \u003ctd\u003e\u003cstrong\u003eCost\u003c\/strong\u003e\u003c\/td\u003e\n            \u003ctd\u003eLower\u003c\/td\u003e\n            \u003ctd\u003eHigher\u003c\/td\u003e\n          \u003c\/tr\u003e\n          \u003ctr\u003e\n            \u003ctd\u003e\u003cstrong\u003eWeight\u003c\/strong\u003e\u003c\/td\u003e\n            \u003ctd\u003eHeavier\u003c\/td\u003e\n            \u003ctd\u003eLighter\u003c\/td\u003e\n          \u003c\/tr\u003e\n          \u003ctr\u003e\n            \u003ctd\u003e\u003cstrong\u003eApplication\u003c\/strong\u003e\u003c\/td\u003e\n            \u003ctd\u003ePassenger cars, light‑duty\u003c\/td\u003e\n            \u003ctd\u003eHeavy‑duty, high‑performance, and regeneration‑intensive\u003c\/td\u003e\n          \u003c\/tr\u003e\n        \u003c\/tbody\u003e\n      \u003c\/table\u003e\n      \u003cp\u003eIn general, cordierite is cost‑effective and suitable for standard applications, while SiC offers superior thermal durability and is preferred for heavy‑duty and high‑temperature conditions, especially where frequent regeneration is required.\u003c\/p\u003e\n    \u003c\/div\u003e\n  \u003c\/details\u003e\n\n  \u003c!-- Q8 – SDPF\/SCRF最小起订量 --\u003e\n  \u003cdetails\u003e\n    \u003csummary\u003e\u003cspan class=\"q-mark\"\u003eQ8\u003c\/span\u003e Minimum order quantity (MOQ) for SDPF\/SCRF\u003c\/summary\u003e\n    \u003cdiv class=\"answer-wrap\"\u003e\n      \u003cp\u003eOur minimum order quantities vary by material type:\u003c\/p\u003e\n      \u003cul\u003e\n        \u003cli\u003e\n\u003cstrong\u003eSilicon Carbide (SiC) material:\u003c\/strong\u003e \u003cstrong\u003e3 pieces\u003c\/strong\u003e (3pcs)\u003c\/li\u003e\n        \u003cli\u003e\n\u003cstrong\u003eCordierite material:\u003c\/strong\u003e \u003cstrong\u003e10 pieces\u003c\/strong\u003e (10pcs)\u003c\/li\u003e\n      \u003c\/ul\u003e\n      \u003cp\u003eThese MOQs are set to ensure efficient production and coating processes. For larger volumes, we offer competitive pricing and shorter lead times. If you require a specific quantity below these MOQs, please contact our sales team to discuss possibilities.\u003c\/p\u003e\n    \u003c\/div\u003e\n  \u003c\/details\u003e\n\n  \u003c!-- Q9 – 公司总部地址 --\u003e\n  \u003cdetails\u003e\n    \u003csummary\u003e\u003cspan class=\"q-mark\"\u003eQ9\u003c\/span\u003e Where is your headquarters located?\u003c\/summary\u003e\n    \u003cdiv class=\"answer-wrap\"\u003e\n      \u003cp\u003eOur company headquarters is located at:\u003c\/p\u003e\n      \u003cp\u003e\u003cstrong\u003eBuilding C, Zhongguan Innovation Center, Dongcheng 2nd Road, Pujiang Town, Minhang District, Shanghai, China\u003c\/strong\u003e\u003c\/p\u003e\n      \u003cp\u003eWe welcome business visits by appointment. Please contact us in advance to arrange a suitable time.\u003c\/p\u003e\n    \u003c\/div\u003e\n  \u003c\/details\u003e\n\n  \u003c!-- Q10 – 如何联系我们 --\u003e\n  \u003cdetails\u003e\n    \u003csummary\u003e\u003cspan class=\"q-mark\"\u003eQ10\u003c\/span\u003e How can I contact you?\u003c\/summary\u003e\n    \u003cdiv class=\"answer-wrap\"\u003e\n      \u003cp\u003eYou can reach our team directly via WhatsApp or email. We are happy to assist with any questions about products, sizing, orders, or technical support.\u003c\/p\u003e\n\n      \u003cdiv class=\"contact-item\"\u003e\n        \u003cstrong\u003eDavin\u003c\/strong\u003e\u003cbr\u003e\n        WhatsApp: \u003ca href=\"https:\/\/wa.me\/8613335696939\" target=\"_blank\"\u003e+86 133 3569 6939\u003c\/a\u003e\u003cbr\u003e\n        E-mail: \u003ca href=\"mailto:KSRCAT@proton.me\"\u003eKSRCAT@proton.me\u003c\/a\u003e\n      \u003c\/div\u003e\n\n      \u003cdiv class=\"contact-item\"\u003e\n        \u003cstrong\u003eAlison\u003c\/strong\u003e\u003cbr\u003e\n        WhatsApp: \u003ca href=\"https:\/\/wa.me\/8615082475717\" target=\"_blank\"\u003e+86 150 8247 5717\u003c\/a\u003e\u003cbr\u003e\n        E-mail: \u003ca href=\"mailto:Ksrcatalytic@gmail.com\"\u003eKsrcatalytic@gmail.com\u003c\/a\u003e\n      \u003c\/div\u003e\n\n      \u003cdiv class=\"contact-item\"\u003e\n        \u003cstrong\u003eMia\u003c\/strong\u003e\u003cbr\u003e\n        WhatsApp: \u003ca href=\"https:\/\/wa.me\/8613681711685\" target=\"_blank\"\u003e+86 136 8171 1685\u003c\/a\u003e\u003cbr\u003e\n        E-mail: \u003ca href=\"mailto:Kesairay@proton.me\"\u003eKesairay@proton.me\u003c\/a\u003e\n      \u003c\/div\u003e\n\n      \u003cp\u003eWe typically respond within 24 hours (Monday–Saturday). Please include your order number or vehicle details for faster assistance.\u003c\/p\u003e\n    \u003c\/div\u003e\n  \u003c\/details\u003e\n\u003c\/div\u003e","brand":"SVIPCAT","offers":[{"title":"Cordierite \/ SCR Coating \/ 158x140mm","offer_id":54463874957658,"sku":null,"price":70.63,"currency_code":"GBP","in_stock":true},{"title":"Cordierite \/ PT + SCR Coating \/ 158x140mm","offer_id":54463874990426,"sku":null,"price":121.78,"currency_code":"GBP","in_stock":true},{"title":"Silicon carbide \/ SCR Coating \/ 158x140mm","offer_id":54463875023194,"sku":null,"price":104.73,"currency_code":"GBP","in_stock":true},{"title":"Silicon carbide \/ PT + SCR Coating \/ 158x140mm","offer_id":54463875055962,"sku":null,"price":155.88,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0958\/5164\/3226\/files\/33_0409e9ad-d8dd-42db-aed8-a446c64b4f4c.jpg?v=1784792352","url":"https:\/\/www.svipcat.com\/products\/dpf-scrf-sic-ceramic-diesel-particulate-filter-158mm-6-22","provider":"SVIPCAT Store","version":"1.0","type":"link"}