Wabco 9347021010 Quadruple Protection Valve

Description

The Wabco 9347021010 Quadruple Protection Valve is a critical component within air brake systems, designed to safeguard against excessive pressure buildup and ensure reliable braking performance in commercial vehicles. This valve is typically installed within the air reservoir system, protecting downstream components from damage. It features dynamic operation, with calculated volume of 1.3412 and operates within a temperature range of -40°C to +90°C. Its robust design and precise pressure regulation—including opening pressures ranging from 4.5 to 6.1 bar and closing pressures from 3.5 to 4.5 bar—provide enhanced system safety and longevity. The valve measures 83 x 113 x 143 mm and incorporates M16 x 1.5 and M22 x 1.5 port threads, ensuring compatibility with standard air brake connections.

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 9347021010) comes with a 1-year warranty.