Wabco 4750100240 Pressure Limiting Valve

Description

The Wabco 4750100240 Pressure Limiting Valve is a crucial component within air brake systems, designed to regulate and limit air pressure, ensuring optimal braking performance and safety in commercial vehicles. This valve is typically installed within the air lines leading to the brake actuators. It maintains a consistent and safe operating pressure, preventing over-pressurization and potential damage to the braking system. This device features a calculated volume of 1.26 and operates with a delivered pressure of 1.4 at 8.0 bar, while also being able to handle a maximum operating pressure of 20.0 bar. It is designed with M22 x 1.5 port threads and mounting provisions for 2x Ø 8.6 mm bolts, while the bolt spacing is 56.5 mm. The adjustable pressure range is from 1.0 to 3.5 bar and it is built to OE specification with a temperature range of -40°C to +80°C. Its dimensions are 100 x 140 x 90 mm.

Key Features & Benefits

This valve basically controls the maximum air pressure that goes into your brake system. It takes the higher pressure from your air compressor and reduces it to a safe level for the rest of your components – things like your air bags, actuators, and brake chambers. It’s a pretty simple idea, but really important for keeping everything working correctly. It doesn't make pressure, it just manages it, stepping it down to what the system needs. Think of it as a gatekeeper for your air brake system. It sits between the air compressor and the rest of the braking components. It ensures no single part is over – pressurized. It’s commonly found on trucks and trailers, anything that relies on air brakes to stop safely. Different vehicles might have it located in slightly different spots, usually somewhere along the air lines near the compressor or the first major components.

Symptoms, Risks & Replacements

Well, if this valve fails, you could have too much pressure going to parts that aren’t designed for it. That’s a recipe for blown seals, damaged actuators, or even complete brake failure. It acts like a shield, protecting the more sensitive parts of your air system. You’ll notice if it's failing – things like brakes dragging, unusually long stopping distances, or the air compressor running constantly. It's a relatively inexpensive part considering what it protects, and it's one of those things it's best to replace proactively if you suspect trouble. Fixparts Online has a good selection of these if you're looking for a replacement, and they often have diagrams that help you find the correct one for your vehicle.

Warranty Information

Wabco Pressure Limiting Valve (MPN 4750100240) comes with a 1-year warranty.