The high-pressure chamber of the ammonia valve is connected to the steel cylinder, and the low-pressure chamber is the gas outlet leading to the use system. The indication value of the high pressure gauge is the pressure of the gas stored in the cylinder. The outlet pressure of the low pressure gauge can be controlled by the adjusting screw.

When using, first turn on the main switch of the cylinder, then turn the low pressure gauge pressure adjusting screw clockwise to compress the main spring and drive the film, spring spacer and ejector rod to open the valve. In this way, the imported high-pressure gas enters the low-pressure chamber after being throttled and decompressed from the high-pressure chamber, and leads to the working system through the outlet. Turn the adjusting screw to change the height of the valve opening, so as to adjust the throughput of high-pressure gas and achieve the required pressure value.

Ammonia shut-off valves are equipped with safety valves. It is a device to protect the ammonia gas pressure reducing valve and make it safe to use, and it is also a signal device for the failure of the ammonia gas pressure reducing valve. If the outlet pressure rises by itself and exceeds a certain allowable value due to valve gasket, valve damage or other reasons, the safety valve will automatically open the exhaust.