Wabco 4750100027 Pressure Limiting Valve

Description

The Wabco 4750100027 Pressure Limiting Valve is a crucial component within air brake systems, designed to regulate and maintain safe air pressure. It's commonly used in commercial vehicles and trailers to prevent over-pressurization. This valve ensures optimal braking performance and system longevity by consistently limiting pressure to a pre-set level. The valve features a calculated volume of 0.946, operates with a delivered pressure of 1.8 at 7.5 bar, and has a maximum operating pressure of 20.0 bar. It's designed with a 1.0 to 3.5 bar range of adjustment and utilizes M22 x 1.5 port threads for both connections. Its dimensions are 86 x 88 x 125 mm, and the distance between mounting bolts is 56.5 mm. This is an OE specification exchange unit for 475 010 002 0, designed for operation within a temperature range of -40°C to +80°C.

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 4750100027) comes with a 1-year warranty.