The TMG Reverse Modulating Brake Valve can be used in negative braking systems to actuate a spring apply hydraulic release service brake. The term “reverse modulating” is used because pressure is decreased to actuate the brake from a preset pressure that keeps the brake fully released. The preset pressure is regulated to a level above the full release pressure of the brake and must be maintained to assure that brake drag does not occur.
To actuate the spring apply/hydraulic release brake, apply the brake pedal and hydraulic pressure in the brake system is reduced causing the springs to apply the brake. Brake pedal position and force is proportional to the brake system pressure and provides the feedback necessary for good braking control.
Working Conditions:
Fluid Type: Mineral Base Hydraulic Oil.
Viscosity Range: 2.8~380cst.
Fluid Temperature: -30°c~107°c.
Filtration: 18/16/13, according to ISO4406.
Maximum Back Pressure is less than 1bar.
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