& nbsp; < b > series brake valve & nbsp; & nbsp; & nbsp; 3514010 - C0100 11, 12 - inlet & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; 21 4-M16X1.5-6H, 22, a port & nbsp & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; 2-M16X1.5-6H & nbsp; & nbsp; & nbsp; 3 - exhaust port < b > use: < / b > in the braking process of the dual circuit brake system and release process achieve sensitive servo control. application: Dongfeng Tianlong / Hercules series models.