Zone alarm (LTD) valve box 1 .LCD display, touch screen, man-machine interface. 2. With alarm device,can remote alarm. 3. RS485 interface, network monitoring. 4. Bypass vale easy maintenancve. Technical Parameters 1. Applicable ambient temperature -20-60 degrees Celsius, ambient humidity 10%-95% . 2. Oxygen, air (breathing), nitrous oxide, carbon dioxide should be able to withstand 0.8Mpa pressure without leakage. 3. Nitrogen, power air should be able to withstand 1.2Mpa pressure without leakage. 4. Negative pressure should be able to withstand -0.075Mpa pressure without leakage. 5. The gas valve box is mainly composed of ball valves, copper tubes of corresponding. specifications, boxes, decompressors, flow meters, high and low pressure alarm devices, etc 6. Can be customized according to customer needs.