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* Corrected - A brake proportioning valve distributes brake pressure between front and rear brakes. Different valves are in use depending upon the types of brakes and weight distribution of the car. The proportioning valve generally assures that the rear brakes do not "lock" as the car brakes and even more weight is transferred to the front wheels.

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βˆ™ 2012-09-16 11:18:21
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Q: What is a brake proportion valve?
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How does a brake pressure control valve work?

the brake control valve is used to control the amount of hydrauic pressure form the hydraulic system to the brake system through the metering valve.

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What does air in brake line do to the brakes?

The air in an air brake system is the "fluid" to activate the brake, much like brake fluid activates the brakes in your car. One difference is that you are not pushing air down the lines when you step on the brake pedal, instead you are releasing a metered amount of air, or "application pressure" from the reservoir, through the treadle valve (brake pedal/valve) to the brake chambers, to apply the brakes. Air also releases the parking brake, as the parking brake is always in the on mode, until you push a valve on the dashboard, sending compressed air to the parking brake chambers, releasing them. The parking brakes are spring powered, and the air over rides these springs.

What are Metering valves are used on?

The metering valve is a device installed in the vehicle braking system of the rear drum brake and the front disc brake. The valve controls the pressure distribution of the brake to stabilize the vehicle during braking, improve braking efficiency, and make braking safer. Metering valves are located at various points in the brake system, depending on the brand and model, and may be used to adjust the internal pressure of the hydraulic brake system. Contact Tel : 0086-020-22939609 Phone : +86-15625008015 What’app : 15625008015

On a big rig where is the SR-1 spring brake valve located?

I think you mean QR-1 valve, and you're not guaranteed to have that. You could have a QR-1, QR-1, or an R14 relay valve. It's usually mounted high and near the center. Go under the truck, follow the lines from the emergency chamber of the brake chamber up - the valve they both connect to will be the metering valve for the spring brakes. A QR-1 valve will have three air lines attached to it, a QR-1C will have four, an R14 relay valve will have at least five.

Related questions

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If you have 4 wheel disc brakes, it doesn't use a proportion valve.

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