In physical and chemical experiments, gases such as oxygen, nitrogen, hydrogen, and argon are often used. These gases are generally stored in special high-pressure gas cylinders. When in use, the gas pressure is reduced to the required range of the experiment through a
Universal Valve, and then fine-tuned through other control valves to allow the gas to enter the use system. The commonly used Universal Valve is a
Gate Valve, referred to as an oxygen meter. Working principle of the Gate Valve
The high-pressure chamber of the Gate Valve is connected to the cylinder, and the low-pressure chamber is the gas outlet and leads to the use system. The indication 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 in use, first turn on the main switch of the cylinder, and then turn the low-pressure gauge pressure adjusting screw clockwise to compress the main spring and drive the film, spring pad and push rod to open the valve. In this way, the imported high-pressure gas enters the low-pressure chamber after throttling and decompression 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, thereby adjusting the amount of high-pressure gas passing through and reaching the required pressure value.
Universal Valve are equipped with safety valves. It is a device to protect the Universal Valve and make it safe to use. It is also a signal device for Universal Valve failure. If the outlet pressure rises automatically and exceeds a certain allowable value due to damage to the valve pad or valve or due to other reasons, the safety valve will automatically open to exhaust.
