... work of heatless desiccant air dryer, inlet use shuttle valve, outlet use N.C check valve. XJK-XG1P Heatless Desiccant Air Dryer Controller ... new product, control 3 valves, inlet valve is shuttle valve, and outlet valve is N.C one-way valve. Technical parameter:1. rating voltage: AC ... output current for valves: 0.8A @ DC220V3. rating voltage of valve: DC 24V4. time precision: <1% in every 3 minutes5. ...