Wabco 9732880050 Compact Relay Valve

Description

The Wabco 9732880050 is a compact relay valve used within air brake systems. It regulates air pressure to ensure optimal braking performance in commercial vehicles and trailers. This device features a calculated volume of 2.886 and mounting provisions for 2x Ø 8.8 mm bolts, with a bolt spacing of 38 mm. It has ports with threads of 1/2 - 14 NPTF, 3/8 - 18 NPTF, a flap connection, and 1/4 - 18 NPTF. The relay valve operates with a maximum pressure of 8.0 bar and is specified to OE standards, offering reliable performance across a temperature range of -40°C to +80°C. Its compact dimensions are 121 x 134 x 178 mm.

Key Features & Benefits

This little valve basically takes the signal from your brake pedal – a relatively low – pressure signal – and amplifies it. It takes that small signal and uses the air from your main air reservoir to deliver a strong, full – pressure signal to your brake chambers at the wheels. Think of it like a muscle – your foot press is the signal, and this valve makes the big muscles – the brakes – actually work. It’s a quick – response valve, meaning it opens and closes fast to match what you’re doing with the pedal. It also has a quick exhaust feature to release pressure rapidly when you let off the brakes. It sits in the air brake line between your brake pedal control valve and the brake chambers on the axles. It’s a key part of making the brakes actually apply when you press the pedal. Without it, you’d have a weak, delayed braking response, or potentially no brakes at all. It’s found on most heavier vehicles – trucks, trailers, buses – anything with air brakes.

Symptoms, Risks & Replacements

It’s critically important for safety, plain and simple. It’s part of what gives you reliable stopping power. You’ll notice if a relay valve is failing because your brakes might feel slow to respond, feel weak, or you might even get a partial or complete loss of braking on an axle. It acts like a shield, protecting the rest of your air brake system from excessive pressure. If you’re having brake issues, this is one of the first things we check. You can often find these readily available – we carry a good selection at Fixparts Online, and it’s something a decent mechanic can replace pretty easily.

Warranty Information

Wabco Compact Relay Valve (MPN 9732880050) comes with a 1-year warranty.