Wabco 4750103020 Pressure Limiting Valve

Description

The Wabco 4750103020 is a Pressure Limiting Valve crucial for the safe and reliable operation of air brake systems. This valve is designed to protect air brake components from excessive pressure, commonly used in trucks, buses, and other commercial vehicles. It effectively regulates air pressure, preventing damage to the system and ensuring optimal braking performance. The valve features a calculated volume of 0.723, operates with a delivered pressure of 5.3 at 7.5 bar, and has a maximum operating pressure of 20.0 bar. It accepts port threads of M22 x 1.5 and mounts with 2x Ø 8.6 mm bolts. Its dimensions are 85 x 50 x 170 mm, and it boasts an adjustable pressure range of 1.2 to 6.2 bar, while adhering to OE specifications for reliable functionality across a temperature range of -40°C to +80°C.

Key Features & Benefits

This valve basically controls the maximum air pressure that gets to certain parts of your air brake system, specifically things like the spring brakes. It limits how much pressure builds up. It’s a pretty simple idea, but it’s crucial for safety. It can also act as a kind of safety net, preventing over – pressurization that could damage other components. Think of it like a gatekeeper for the air pressure. It’s typically installed between the air compressor and the air tanks, and then connected to the spring brakes and sometimes other systems. It's there to make sure no single part gets overwhelmed. It ensures everything stays within safe operating limits, even if your compressor is working a little too hard, or if there's a surge in pressure somewhere.

Symptoms, Risks & Replacements

It's important because those spring brakes are a big deal. They're your emergency brake, and you need them to work every time. If pressure gets too high, it can cause them to partially apply unexpectedly, or even fail completely. This valve protects against that. You’ll notice if this valve fails because your spring brakes might not hold properly, or might drag a bit. It's a key safety component, and keeping it in good working order is essential. You can often find replacements at places like Fixparts Online, and they aren't too difficult to swap out if you're comfortable working on air brakes.

Warranty Information

Wabco Pressure Limiting Valve (MPN 4750103020) comes with a 1-year warranty.