Wabco 9347022700 Quadruple Protection Valve

Description

The Wabco 9347022700 Quadruple Protection Valve is a critical component within air brake systems, designed to safeguard against dangerous pressure build-up. This valve is commonly used in heavy-duty vehicles and trailers to protect all four air brake circuits. It operates by isolating individual circuits in the event of a leak or malfunction, ensuring continued braking performance in critical situations. With dimensions of 91 x 113 x 111 mm, this dynamic valve features multiple pressure settings for optimized performance, including a maximum operating pressure of 20.0 bar and various opening/closing pressures ranging from 6.7 to 7.0 bar. Its OE specification ensures compatibility and reliable function within existing air brake systems.

Key Features & Benefits

This valve basically does four key things. First, it prevents air from flowing backwards in the system – think of it like a one – way street for the compressed air. Second, it maintains pressure even if the engine isn't running, so your brakes stay engaged when you need them. Third, it protects against excessive pressure buildup. Too much pressure is dangerous, and this valve releases it to keep things safe. And finally, it acts like a shield, preventing the entire air brake system from losing pressure if there’s a leak downstream – say, in a brake chamber at one of the wheels. It’s a core part of your air brake system, obviously. Specifically, it's usually placed where the service and spring brakes split. The service brakes are what you use to slow down and stop normally with the pedal. The spring brakes are a safety feature that automatically apply if you lose air pressure—it keeps the vehicle from rolling away. This valve manages the air flow to both systems, ensuring everything works as it should.

Symptoms, Risks & Replacements

It’s crucial for safety, plain and simple. If this valve fails, you’ll notice if your brakes feel spongy, or if the spring brakes don’t engage properly when you shut off the engine. A malfunctioning valve can lead to reduced braking performance, or even complete brake failure – and that’s obviously something you want to avoid. Regular checks and replacement when needed are the best way to keep everything safe. You can find a good replacement at places like Fixparts Online, and they have diagrams that can help you pinpoint the right part for your vehicle.

Warranty Information

Wabco Quadruple Protection Valve (MPN 9347022700) comes with a 1-year warranty.