Nozzle Sealing Gasket
Уплотнительная прокладка форсунки
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The 612640130674 OEM Nozzle Sealing Gasket is a precision-engineered sealing component manufactured exclusively for the Shacman X5000 heavy-duty truck platform. This critical gasket is installed at the interface between the DEF dosing nozzle and the exhaust pipe mounting boss, creating a gas-tight seal that prevents the leakage of hot exhaust gases while precisely positioning the urea nozzle at the correct depth and angle for optimal diesel exhaust fluid spray distribution into the exhaust stream under all engine operating conditions.
Constructed from high-temperature resistant graphite composite, multi-layer stainless steel, or specialized metallic materials with precisely controlled thickness and surface finish, the nozzle sealing gasket delivers exceptional conformability, thermal conductivity, and long-term sealing reliability under the extreme thermal cycling and corrosive exhaust condensate conditions experienced at the DEF injection point. The 612640130674 part features an accurately formed inner and outer diameter that perfectly matches the nozzle body and the mounting boss counterbore, ensuring uniform compression and a complete seal when the nozzle is torqued to specification.
Installing a genuine OEM nozzle sealing gasket at every DEF injector service preserves the designed exhaust system sealing integrity and prevents the exhaust gas leaks that can cause inaccurate dosing, external DEF crystallization, and potential damage to surrounding components. The 612640130674 identifier provides complete traceability to Shacman’s rigorous material specifications and precision manufacturing quality assurance standards for this emissions-critical sealing component.
| Parameter | Specification | Details |
|---|---|---|
| OEM Part Number | 612640130674 | Unique Shacman X5000 identifier |
| Product Name | Nozzle Sealing Gasket | DEF injector mounting seal |
| Brand / Vehicle Model | Shacman X5000 | Heavy-duty truck series |
| Material | Graphite composite or multi-layer stainless steel | High-temperature and chemical resistant |
| Manufacturing Process | Precision die-cut or machined | Exact inner and outer diameter tolerances |
| Sealing Mechanism | Compressive face sealing | Conforms to surface irregularities under torque |
| Temperature Resistance | Exceeds 600°C continuous | Designed for exhaust injection point conditions |
| Fluid Compatibility | DEF and exhaust gas resistant | No degradation from urea or condensate exposure |
| Application | SCR system DEF dosing nozzle mounting | Seals nozzle-to-exhaust pipe interface |
| Packaging | Protective sealed packaging | Shacman genuine labeled packaging |
The gasket creates a positive seal at the nozzle mounting point, preventing high-temperature, high-pressure exhaust gases from escaping around the nozzle body and causing thermal damage to the nozzle solenoid and surrounding components.
The 612640130674 gasket’s specific thickness sets the correct insertion depth of the nozzle tip into the exhaust stream, which is critical for achieving the designed DEF spray pattern and optimal mixing with the exhaust gases.
The gasket material acts as a thermal barrier that reduces heat transfer from the exhaust pipe to the nozzle body, and resists chemical attack from DEF and the acidic exhaust condensate that forms during cold operation.
The nozzle sealing gasket 612640130674 is installed at the base of the DEF dosing nozzle before the nozzle is threaded into its mounting boss on the exhaust pipe of the Shacman X5000 vehicle. Before installation, the gasket sealing surfaces on both the nozzle and the mounting boss must be absolutely clean and free of any old gasket material, crystallized DEF deposits, or corrosion. The new gasket is placed over the nozzle tip and seated against the nozzle body flange. The nozzle is then threaded into the mounting boss by hand to avoid cross-threading, and tightened to the exact factory torque specification using a calibrated torque wrench. The specified torque is critical; under-torquing will result in an exhaust gas leak, while over-torquing can crush the gasket excessively or damage the nozzle threads. After installation, the DEF supply line is connected, the system is pressurized, and the nozzle area is visually inspected for any signs of exhaust gas or DEF leakage before the vehicle is returned to service.
Each nozzle sealing gasket produced under OEM number 612640130674 is manufactured from premium gasket materials specifically selected for the extreme high-temperature and chemically aggressive environment of the exhaust DEF injection point. Graphite composite gaskets are manufactured from expanded graphite reinforced with a metal core for structural integrity and crush resistance. The graphite material provides exceptional conformability to surface irregularities and maintains its sealing properties at temperatures that would degrade conventional gasket materials, while resisting the corrosive effects of DEF and exhaust condensate.
Multi-layer stainless steel gaskets are formed from precision-rolled stainless steel sheets that are cut to shape and may incorporate embossed beads that concentrate the available clamping force around the sealing area. Each gasket is manufactured to exacting dimensional tolerances for inner diameter, outer diameter, and material thickness. Each production batch undergoes dimensional inspection and material verification. Sample gaskets are subjected to temperature cycling and leakage testing to verify their sealing performance under simulated exhaust conditions. The gaskets are packaged in protective sealed packaging that prevents surface damage and contamination, and each package is labeled with the 612640130674 part number for complete traceability.
The nozzle sealing area should be visually inspected during routine vehicle service for any signs of black soot deposits around the nozzle base, which indicate an exhaust gas leak past the gasket. White crystalline DEF deposits around the nozzle can indicate either a DEF leak from the supply connection or exhaust gases escaping and causing DEF to crystallize. Any evidence of leakage must be addressed immediately to prevent inaccurate DEF dosing and potential damage to surrounding components.
The nozzle sealing gasket is a single-use component that must be replaced with a new 612640130674 part whenever the DEF dosing nozzle is removed from the exhaust pipe for any reason, including nozzle replacement, cleaning, or inspection. Reusing a nozzle sealing gasket is extremely risky because the gasket material has already been compressed and thermally cycled, and it will not provide a reliable seal when reinstalled. A leaking nozzle gasket can allow hot exhaust gases to escape, potentially damaging the nozzle solenoid, wiring, and surrounding components. The cost of a new gasket is insignificant compared to the potential damage caused by an exhaust gas leak at this critical location.
Procuring the authentic nozzle sealing gasket for your Shacman X5000 SCR system service is a simple process that ensures reliable sealing and dosing accuracy. Use the inquiry button above to verify current stock availability and request a prompt quotation. We maintain comprehensive inventory of these essential sealing components to support both individual nozzle replacements and complete fleet SCR system maintenance programs across all international markets.
To ensure you receive the exact factory-specified sealing gasket with correct material and dimensions for your application, always reference the OEM part number 612640130674 in your purchase order. Our logistics team provides complete export documentation with every international shipment for efficient customs clearance and inventory verification at your facility.
Emissions-Critical Stock Available
Immediate dispatch for Shacman X5000 DEF nozzle service worldwide.
Choosing the genuine Nozzle Sealing Gasket 612640130674 is a decision that directly protects the DEF dosing accuracy and exhaust system integrity of your Shacman X5000 vehicle. Aftermarket gaskets manufactured from inferior materials or with incorrect thickness can fail to seal properly, allowing hot exhaust gases to escape and potentially melt the plastic DEF supply line, damage the nozzle solenoid, or cause a vehicle fire. An exhaust leak at the nozzle also disrupts the carefully designed flow patterns that ensure proper DEF mixing, leading to poor NOx conversion efficiency.
The OEM gasket’s specific material, precise thickness, and exact dimensions were validated through extensive thermal cycling, vibration, and pressure pulsation testing on Shacman’s engine test stands. Engineers specified this exact sealing gasket to provide the gas-tight seal that is critical for safe and efficient SCR system operation. The 612640130674 gasket delivers the dependable sealing performance that keeps the DEF nozzle securely mounted and the exhaust gases safely contained within the pipe, where they belong.
Professional fleet technicians and maintenance managers worldwide insist on the 612640130674 nozzle sealing gasket for its guaranteed material quality, precise dimensions, and proven sealing reliability in the most punishing thermal and chemical conditions. This small but critical sealing component performs the vital function of keeping hot exhaust gases from escaping at the DEF injection point, protecting both the dosing system and the vehicle. Trust only the sealing gasket that Shacman engineered and certified for the demanding X5000 heavy truck platform.
The nozzle sealing gasket 612640130674 operates in one of the most chemically aggressive and thermally demanding locations in the entire exhaust system. It is simultaneously exposed to the DEF fluid, which contains urea and water, the hot exhaust gases, which contain acidic compounds from the combustion process, and the products of the SCR reaction itself. The gasket material must resist attack from all of these chemical species while maintaining its sealing integrity through the rapid temperature changes that occur as the engine load varies and as the DEF spray cools the nozzle tip area.
The correct torque on the nozzle body is essential for achieving the designed gasket compression. The torque specification is carefully calculated to provide sufficient sealing force without crushing the gasket or deforming the nozzle flange. Using a calibrated torque wrench and following the specified torque value and sequence is critical. After the first few thermal cycles following installation, it is good practice to recheck the nozzle torque to compensate for any initial relaxation of the gasket material, ensuring the joint remains tight and leak-free for the long service life ahead.
For our international customers, we take exceptional care in packaging the 612640130674 nozzle sealing gaskets to prevent any bending, surface damage, or contamination during global transit and warehouse storage. Each gasket is individually packed in a sealed protective envelope that maintains its surface finish and precise dimensions. Partner with our global supply network for a reliable source of genuine Shacman SCR system sealing components, and ensure that every DEF nozzle on your fleet’s vehicles is sealed with the quality and integrity that protects both emissions performance and vehicle safety.
