Abstract: A pressure control valve applicable to anti-skid devices in automobile vehicles is provided with two hydraulically independent fluid circuits. One circuit controls the actuation of vehicle's brakes and the other circuit controls the braking effect of the vehicle's wheels to avoid skidding of the vehicle. Both circuits are related through the functions of two pistons, one piston being for storage to serve as an intermediary between a control fluid and a spring which accumulates energy and work as a differential piston, and the other piston being for the main actuation of the valve. The axial movements of the pistons allow the brake circuit fluid to compress or decompress as well as to open and close a valve which connects the conventional brake circuit to the anti-skid system.