Air cartridge is made of air dryer,protection valve and tire inflation connection.A multi-circuit protection device,one/two integrated pressure-limited valve and two integrated one-way valve are connected with air dryer by flange.
Some variant products are also equipped with dual pressure sensors,connected with multi-circuit protection valve,used for measuring supply pressure of brake circuit.Compared with one-way valve,it has advantage of compact structure,easy installation and small space.