Wabco 9730030100 Relay Valve

Description

The Wabco 9730030100 Relay Valve is a critical component within air brake systems, primarily used in commercial vehicles to ensure reliable and efficient braking performance. This valve regulates air pressure between the brake pedal and the service brakes, quickly supplying and exhausting air to activate the brakes. It features connections for exhaust, multiple port threads including M22 x 1.5 JED-388-3, and a silencer connection. This pressure reduction valve operates within a temperature range of -40°C to +80°C, features a 1:1 regulating ratio, and has an opening pressure of 0.3 bar with a maximum operating pressure of 15.0 bar. The dimensions of the valve are 137 x 113 x 132 mm, adhering to OE specifications for dependable functionality and longevity.

Key Features & Benefits

Basically, a relay valve takes the signal from your brake pedal – that initial push – and boosts it, sending a stronger, faster signal down the air brake lines to the brake chambers at each wheel. It’s like an amplifier for your braking. It manages the air pressure, allowing a quick build – up when you apply the brakes, and then releases it when you let off. It also has a “quick release” feature – it vents the air from the brake lines faster than the foot valve alone can, which helps with quicker braking and prevents the brakes from staying partially applied. It sits in the air brake system, usually somewhere between your foot valve and the air brake chambers. It's a key component in how your air brakes work, taking that initial signal and distributing the air pressure to actually do the stopping. Think of it as a middleman, stepping up the power. It's most commonly found on trucks and trailers, of course, anything using air brakes.

Symptoms, Risks & Replacements

Well, if this valve fails, you’ll notice if you're trying to stop. You might get a delayed response when you hit the brakes, or they might not apply fully. It can also cause the brakes to drag a little, which wastes fuel and wears down your brake components faster. A failing relay valve is a safety issue, plain and simple. You want to address it as soon as you suspect a problem. We carry a good selection of them, and you can also find options at places like Fixparts Online, just to compare. Getting the right one is important, so make sure you have your vehicle’s information handy when you order.

Warranty Information

Wabco Relay Valve (MPN 9730030100) comes with a 1-year warranty.