Heavy-Duty Brass Air Brake
Shut-Off Valve with Auto-Exhaust
A premium, dual-metal manual shut-off valve designed to safely isolate pneumatic lines and automatically vent trapped pressure. Engineered specifically for professional semi-truck and trailer air systems.
Integrated Automatic Exhaust Function
Standard shut-off valves trap pressurized air inside the line, creating potential hazards during brake component maintenance. This advanced valve features a built-in automatic exhaust port.
The moment you twist the hand knob to cut off the air supply, the internal exhaust core automatically activates, safely and silently venting downstream air pressure to the atmosphere.
Forged Brass Valve Body with Rugged Zinc-Plated Fittings
Engineered to endure the harsh, moisture-rich, and high-vibration environments of truck undercarriages. The central valve body is constructed from solid forged brass to ensure zero corrosion and rust-proof reliability.
To protect critical connections from cross-threading and thread stripping, both ends are precision-machined from heavy-duty iron with a colored zinc-plated rust-resistant finish.
Standard M18 × 1.5 Precision Threads & Space-Saving Profile
Designed for seamless, universal integration on trailers and trucks. The precision-machined threads (male-to-female union style) guarantee a tight, permanent metal-to-metal gas seal.
Its ultra-compact profile fits comfortably in tight spaces around the brake chamber or main chassis frame, with an active hex nut that makes installation simple even with standard wrenches.
Technical Specifications
| Specification Parameter | Product Detail Details |
|---|---|
| Thread Size | M18 × 1.5 (Standard Metric) |
| Housing Material | Heavy-Duty Forged Brass (Copper Body) |
| Fittings & End Connectors | Corrosion-Resistant Zinc-Plated Iron |
| Actuation Type | Manual 90-Degree Turn Lever (Plated Plastic Handle) |
| Exhaust Port | Integrated Self-Venting Port with White Cross Core |
| Compatibility | Universal for Semi-Trailers, Trucks, Heavy Machinery Air Brake Systems |
Frequently Asked Questions
When the handle is in the open position, air flows straight through. When you rotate the handle 90 degrees to shut off the air flow, the valve simultaneously connects the downstream side of the line to the top exhaust port, quickly venting all pressurized trapped air out of the line so components can be serviced safely.
Yes. The line to be exhausted should be connected to the end aligned with the internal exhaust venting mechanism. Ensure the flow arrow or male/female orientation matches your air supply direction (supply on one side, tools/lines to be exhausted on the other).