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Quick Exhaust Valve – QRV (WABCO)
This valve reduces brake lag by exhausting air directly to the atmosphere instead of routing it back through long air lines. Built with WABCO’s precision engineering, it offers reliable operation, corrosion resistance, and long service life. Its compact and durable design ensures consistent performance even under high-pressure, high-vibration, and harsh environmental conditions.
By speeding up brake release, the QRV enhances brake responsiveness, reduces lining wear, and ensures safer handling during frequent stop-and-go operations.
Key Features
- Enables rapid exhaust of air for quicker brake release
- Improves brake responsiveness and reduces lag
- WABCO-grade precision construction for high reliability
- Corrosion-resistant metal body with durable internals
- Enhances safety in heavy-duty braking cycles
Product Specifications
| GROUP | MODEL | REF. PART NUMBER | SPECIFICATIONS |
|---|---|---|---|
| 11.067 | 3128, 2523, 2528 | A4004310306 | Quick Exhaust Valve – QRV – WABCO Type |
Process Steps
- Depressurize the air system and secure the vehicle.
- Disconnect air lines from the old QRV.
- Remove mounting bolts and detach the valve.
- Install the new QRV in the same position and orientation.
- Reconnect air lines per OEM marking/port codes.
- Pressurize the system, check for leaks, and test brake release timing.
FAQ
When should the QRV be replaced?
Replace if exhaust is slow, valve leaks air, or brakes release unevenly.
Does a faulty QRV affect braking?
Yes, it can cause delayed brake release, overheating, and increased brake wear.
