Wabco 4750103040 Pressure Limiting Valve

Description

The Wabco 4750103040 Pressure Limiting Valve is a critical component within air brake systems, designed to protect the system from overpressure. It's commonly used in heavy-duty vehicles and trailers to regulate air pressure, ensuring safe and reliable braking performance. This valve features a nominal diameter of 4mm for the exhaust and operates within a range of 5.8 to 10.8 bar, with a maximum operating pressure of 20.0 bar. Its construction, adhering to OE specifications, provides precise pressure regulation and consistent performance across a temperature range of -40°C to +80°C. The valve measures 55 x 88 x 142 mm and has M22 x 1.5 port threads, along with 2x Ø 8.6 mm mounting holes and a distance between bolts of 56mm.

Key Features & Benefits

This valve basically controls the maximum air pressure that gets to certain parts of your air brake system, specifically things like the spring brakes. It limits how much pressure builds up. It’s a pretty simple idea, but it’s crucial for safety. It can also act as a kind of safety net, preventing over – pressurization that could damage other components. Think of it like a gatekeeper for the air pressure. It’s typically installed between the air compressor and the air tanks, and then connected to the spring brakes and sometimes other systems. It's there to make sure no single part gets overwhelmed. It ensures everything stays within safe operating limits, even if your compressor is working a little too hard, or if there's a surge in pressure somewhere.

Symptoms, Risks & Replacements

It's important because those spring brakes are a big deal. They're your emergency brake, and you need them to work every time. If pressure gets too high, it can cause them to partially apply unexpectedly, or even fail completely. This valve protects against that. You’ll notice if this valve fails because your spring brakes might not hold properly, or might drag a bit. It's a key safety component, and keeping it in good working order is essential. You can often find replacements at places like Fixparts Online, and they aren't too difficult to swap out if you're comfortable working on air brakes.

Warranty Information

Wabco Pressure Limiting Valve (MPN 4750103040) comes with a 1-year warranty.