Wabco 4630131220 3/2 Way Valve

Description

The Wabco 4630131220 is a 3/2 way valve used within air brake systems. This valve controls the flow of compressed air, directing it to actuate brakes or other pneumatic components in commercial vehicles. Its design ensures precise and reliable switching, contributing to efficient braking performance and system responsiveness. The valve measures 35 x 45 x 115 mm and features M12 x 1.5 exhaust and port threads, as well as M26 x 1.5 mounting. It operates within a temperature range of -40°C to +80°C and has a maximum operating pressure of 10.0 bar.

Key Features & Benefits

This valve basically controls airflow in your air brake system. The ‘3/2’ part tells you what it does – three ports for air to move through, and two positions it can switch between. One position lets air flow to an actuator – like what moves your trailer brakes – and the other position cuts off that flow. It’s a simple on/off switch for the air, controlled by pressure itself, so when enough pressure builds, it flips. It's a core piece of your air brake system, often used in things like trailer supply lines or spring brakes. Think of it as a gatekeeper for the air that ultimately stops your vehicle. It's frequently used to apply or release brakes automatically based on pressure changes, so it doesn’t require constant manual input. A common setup would be in a trailer emergency brake system – if your tow vehicle disconnects, the valve triggers and applies the trailer brakes.

Symptoms, Risks & Replacements

Without this valve working right, your brakes won’t function reliably. If it sticks closed, you could lose braking power. If it sticks open, things can be over – pressurized and cause problems. It’s a pretty critical safety component. You’ll notice if this thing goes bad – usually a total brake failure, or brakes that won’t release properly, or even just erratic braking. It acts like a shield, protecting the rest of the system from damage and making sure the brakes do what they need to do when you need them to. You can find replacements pretty easily – we carry a good selection at Fixparts Online, and plenty of other suppliers do too. Just make sure you get the right one for your setup, as they can vary a bit.

Warranty Information

Wabco 3/2 Way Valve (MPN 4630131220) comes with a 1-year warranty.