The Sitrak SCR Air Control Device is a precision-engineered component critical for the proper functioning of the Selective Catalytic Reduction (SCR) system in modern Sinotruk Sitrak trucks. This device manages and regulates the compressed air supply required for dosing and atomizing Diesel Exhaust Fluid (DEF) into the exhaust stream, which is essential for reducing harmful nitrogen oxide (NOx) emissions. As an integral part of our comprehensive range of Sinotruk Sitrak parts, this air control device ensures optimal SCR system performance, helping vehicles meet stringent Euro V and Euro VI emission standards. Constructed with durable materials and high-precision fittings, the Sitrak SCR Air Control Device provides reliable air pressure regulation and distribution to the SCR dosing module.
The Sitrak SCR Air Control Device is an assembly of pneumatic components designed to supply and regulate compressed air to the SCR system’s dosing unit. This air is used to atomize Diesel Exhaust Fluid (DEF), also known as AdBlue, into a fine mist before it is injected into the exhaust stream. The device typically includes straight-through joint bodies, polyamide tubing, and fittings that connect the vehicle’s air supply to the SCR doser.
This device plays a pivotal role in emission control by managing the air pressure and flow rate to the SCR dosing injector. The precise control of air is necessary to create the correct spray pattern and droplet size for the DEF. If the air pressure is too low, the DEF may not atomize properly, leading to poor mixing and reduced NOx conversion. If it’s too high, it can cause excessive DEF consumption or system damage. The Sitrak SCR Air Control Device incorporates components that maintain pressure stability even when the vehicle’s main air system experiences fluctuations.
The construction of the Sitrak SCR Air Control Device focuses on durability and reliability. The straight-through joint bodies (NG6/NW4 and NG8/NW6) are made from high-quality materials like brass or stainless steel, providing leak-free connections and resistance to corrosion from DEF or environmental contaminants. The polyamide tubing (Φ6*1 and Φ8*1) is flexible, heat-resistant, and capable of withstanding the chemical properties of compressed air and potential DEF exposure.
The environmental and operational benefits of the Sitrak SCR Air Control Device are significant. By enabling precise DEF dosing, it directly contributes to reducing a truck’s NOx emissions by up to 90%, helping fleet operators meet strict environmental standards such as Euro V and VI. This not only avoids potential fines for non-compliance but also supports corporate sustainability goals. A properly functioning air control device also improves fuel efficiency indirectly by ensuring the SCR system works optimally, preventing the engine from entering a derate or limp mode due to emission faults.
| No. | Part Number | Part Name English | Quantity |
|---|---|---|---|
| 1 | WG9000361107 | Straight Through Joint Body NG6/NW4 | 1 |
| 2 | WG9000361106 | Straight Through Joint Body NG8/NW6 | 2 |
| 3 | 190003179782 | Polyamide Tube (Φ6*1) | 3 |
| 4 | 190003179781 | Polyamide Tube (Φ8*1) | 3 |
Our Sitrak SCR Air Control Device is manufactured with exacting tolerances to ensure precise air pressure and flow regulation for the SCR system. Each component, from the joint bodies to the polyamide tubing, is designed to meet OEM specifications, guaranteeing that the DEF is atomized perfectly for maximum NOx reduction. This precision directly translates to reliable compliance with emission standards, avoiding costly fines and vehicle downtime.
Constructed from high-grade materials, our Sitrak SCR Air Control Device is built to last in the demanding environment of a truck’s exhaust after-treatment system. The joint bodies are corrosion-resistant, and the polyamide tubing is specially formulated to withstand exposure to heat, vibration, and potential DEF contact. This durability prevents common failure points like cracking, leaking, or clogging, which can lead to SCR system malfunctions. The robust design ensures long service intervals and reduces the frequency of replacements, lowering your total cost of ownership. Our device is engineered to maintain performance over thousands of operating hours, providing peace of mind and reliability for your critical emission control system.
Designed as a direct OEM replacement, our Sitrak SCR Air Control Device ensures seamless compatibility with Sinotruk SCR systems. The kit includes all necessary components with the correct fittings and tubing lengths, making installation straightforward for technicians. There’s no need for modifications or additional parts, which saves valuable time during maintenance or repairs. The plug-and-play nature of the device minimizes vehicle downtime, getting trucks back on the road faster. Clear installation guidelines are provided to ensure correct setup and optimal performance from the first use. By choosing a genuine compatible part, you eliminate guesswork and ensure the SCR system functions as intended by the manufacturer.
We back our Sitrak SCR Air Control Device with full technical support and a solid warranty. Our expert team can assist with installation queries, troubleshooting, and system integration advice, ensuring you achieve the best performance from the product. The warranty covers any manufacturing defects, giving you confidence in the quality and reliability of your purchase. We also provide access to a wide inventory of genuine Sinotruk parts, making us a one-stop solution for all your SCR system maintenance needs. Our commitment to customer satisfaction means we’re here to support your fleet’s operational efficiency and compliance goals long after the sale.
The Sitrak SCR Air Control Device is more than just a set of fittings and tubes; it is a vital subsystem that ensures your truck’s SCR system operates at its designed efficiency. A well-functioning air control device is key to preventing common SCR problems such as DEF crystallisation, injector clogging, and insufficient NOx conversion, which can lead to increased emissions, reduced fuel economy, and potential engine derates. Regular inspection and timely replacement of this device, using genuine Sinotruk parts, are essential maintenance practices.
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