Wabco 9347140060 Quadruple Protection Valve

Description

The Wabco 9347140060 Quadruple Protection Valve is a critical component in air brake systems, designed to safeguard against overpressure and ensure the reliable operation of braking mechanisms in commercial vehicles. This valve is commonly used in trucks, buses, and trailers. It features a dynamic design with calculated volume of 0.914 and operates within a temperature range of -40°C to +90°C. It boasts multiple opening pressures – 7.2 bar for openings 21 & 22, and 5.7 bar for openings 23 & 24 – alongside a charging pressure of 3.6 bar and a maximum operating pressure of 13.0 bar. With port threads including 1/2 - 14 Dry Seal PTF, and 3/8 - 18 Dry Seal NPTF/PTF, it offers versatile connectivity. The valve’s OE specification ensures optimal performance and compatibility, while its robust construction delivers long-lasting durability and reliable protection for the air brake system.

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 9347140060) comes with a 1-year warranty.