Wabco 9710020220 Emergency Release Valve Relay

Description

The Wabco 9710020220 Relay Emergency Valve with Release Valve is a critical component in air brake systems, designed to rapidly apply and release brakes in emergency situations. This valve is commonly used in commercial vehicles and heavy machinery to ensure driver and passenger safety. It’s a combination of the 9710020200 relay valve and release valve 9630010130. The valve features a calculated volume of 3.095 and operates within a temperature range of -40°C to +65°C, guaranteeing reliable performance in diverse conditions. Its dimensions are 166 x 110 x 169 mm, and it boasts ports with M22 x 1.5 JED-152 and M16 x 1.5 JED-152 threads, alongside a silencer port. With an adjustable range of 0.7 bar and a maximum operating pressure of 10.0 bar, this valve provides precise control and enhances braking efficiency, while adhering to OE specifications for optimal compatibility and performance.

Key Features & Benefits

This relay basically controls the air that releases the spring brakes when you hit the emergency brake button – or if there’s a serious drop in air pressure in the system. It’s an electrically controlled valve; when it gets the signal, it opens up and lets air flow to release those brakes. Think of it as a gatekeeper for that air. It also holds the air pressure in to keep the spring brakes applied normally. It's a crucial part of your air brake system's safety features. Your spring brakes are designed to always apply if you lose air pressure – that’s a fail – safe. This relay is what allows you to manually override that and release those spring brakes when you want to, and also deals with a total air loss. It’s really the control center for that emergency release function. It’s connected to your brake pedal, the emergency brake button, and your air reservoir, so it’s always ready to act.

Symptoms, Risks & Replacements

Without a functioning relay, you won't be able to manually release the spring brakes if needed, and more seriously, the system may not properly release them in an emergency air loss situation. That could mean being stuck, or worse, not being able to control the vehicle. You’ll notice if this part is going bad because the brakes might drag, or the emergency release button won’t work smoothly. It can also cause issues with maintaining proper air pressure. You can find these relays pretty easily, Fixparts Online has a good selection if you’re looking. It’s a relatively inexpensive part considering the trouble it can save you, and definitely something you want to keep in good working order.

Warranty Information

Wabco Emergency Release Valve Relay (MPN 9710020220) comes with a 1-year warranty.