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This main & trailer self-sealing air valve is a heavy-duty pneumatic fitting specially built for semi-truck tractor-trailer air brake systems. Adopting an integrated ball valve structure, it delivers large airflow with zero air resistance. It enables smooth connection and disconnection between tractor and trailer air lines, with reliable self-sealing and exhaust functions. Built for professional truck drivers and fleet maintenance, it solves common headaches like tight coupling, poor airflow, air leakage and difficult trailer decoupling.
✅ Integrated Ball Valve Construction One-piece ball valve design removes air flow restriction. Delivers high volume airflow without pressure drop, keeps your air brake system working at full efficiency.
✅ Smooth Plug & Release with Exhaust Built-in exhaust port allows easy insertion and removal of the air coupling. No fighting to disconnect trailer air hoses, saves massive time during trailer hook-up and drop-off.
✅ Reliable Self-Sealing & Self-Locking Self-sealing structure prevents air leakage after connection. Self-locking function secures the fitting tightly during operation, avoids accidental disconnection while driving.
✅ Universal Connector Design Multi-purpose universal coupling, compatible with most standard tractor-trailer air line fittings. One fitting works with multiple attachments for flexible installation.
✅ Heavy-Duty Solid Brass Build Solid brass valve body with red/blue color-coded knobs for easy identification of service & emergency air lines. Corrosion-resistant, stable performance under long-term vibration and high air pressure in truck applications.
✅ Color Coded for Quick Identification Red and blue assemblies match standard North American trailer air line color coding, easy to tell emergency and service lines apart during maintenance.
FAQs
Product & Usage
1. Are KRANK tools built for professional use?
Yes, all our tools are engineered for heavy-duty performance and long-term reliability.
2. Are KRANK tools safe to use for beginners?
Yes, our tools are designed with safety features and easy handling in mind.
3. Can KRANK tools be used in extreme conditions?
Yes, they are tested to perform reliably in demanding environments.
Maintenance & Accessories
1. What maintenance is required for the tools?
Regular cleaning and proper storage are usually enough to keep your tools in top condition.
2. Can replacement parts or accessories be purchased separately?
Yes, we provide compatible parts and add-ons to extend the life of your tools.
3. Do you provide instruction manuals or usage guides?
Every tool comes with a detailed user manual, and digital guides are available online.
Warranty & Guarantee
1. Do the tools come with a warranty?
Every KRANK tool includes a 1-year warranty, with extended options available on select products.
2. How do I register my KRANK tool for warranty coverage?
You can register online using your product serial number for faster support.
3. What does the warranty cover?
It includes defects in materials and workmanship under normal use conditions.
4. Is there an option to extend the warranty?
Yes, extended warranty plans are available for select tools at checkout.
Purchasing & Support
1. How fast is shipping and delivery?
Orders ship within 24 hours, and delivery typically takes 3–5 business days.
2. Do you offer bulk or corporate purchasing options?
Yes, KRANK provides special pricing and packages for business or team orders.
3. How can I contact customer support if I need help?
You can reach our support team by email or phone — we’re here to assist you.
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