It adopts built-in safety valve for exhaust.The pressure-reducing mechanism adopts piston spring pressure-reducing structure. and is disposed longitudinally to make the structure more compact. Fashionable anodized surface treatment, 12 levels in adjustment. Output pressure: 50PSL Output flow(can be selected): 0?3L/min?0?4L/min?0?8L/min?0?15L/min?0?25L/min