A brake metering valve is used to Balance the Braking Forces. It is only found on vehicles with front disc and rear drum brakes. The metering valve holds back fluid to the front brakes until enough pressure is created to overcome the return springs inside the rear drums. It is also known as a “metering block.”Jan 24, 2019
What's another name for proportioning valve?
Conventional proportioning valves should really be referred to as “braking force regulators” or “brake pressure regulating valves.” While their name might imply true proportional control, in reality they provide a combination of the control found in Figures A and B.
What does the brake proportioning valve do?
A properly-working proportioning valve ensures your rear brakes do not lock-up during heavy braking. This is crucial in any car, but especially in pickup trucks with light backends.
How does a metering valve work?
The metering valve consists of a valve attached to a piston. The piston is held closed by a spring. When there is no force on the brake pedal, the valve allows a small amount of fluid to pass. This allows the fluid to expand and contract with changes in temperature.Jan 24, 2019
Do I need a metering valve?
For your disc / drum brake system, a metering valve is essential for proper balance. A metering valve will control fluid flow from the master cylinder causing the rear drum brakes to engage just before the front disc brakes. This allows the car to settle evenly under braking instead of nose diving.Dec 5, 2018
What are the purposes of the proportioning metering and pressure differential valves?
The proportioning valve is used to prevent rear-wheel lockup. These valves achieve balanced braking by reducing fluid flow and pressure to the rear brakes during hard and sudden stops. It activates only during hard and panicked stops. Most of the time, during light and moderate braking, the valve lies dormant.