How to use a Programmable Switch Butterfly Valve

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 range required for the experiment through the Control Valve, and then fine-tuned through other Control Valve to allow the gas to enter the use system. The commonly used Control Valve is a Programmable Switch Butterfly Valve, referred to as an oxygen meter.

The high-pressure chamber of the Programmable Switch Butterfly 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.
All Control Valve are equipped with safety valves. It is a device that protects the Control Valve and makes it safe to use. It is also a signal device for Control Valve failure. If the outlet pressure rises automatically and exceeds a certain allowable value due to damage to the valve gasket or valve or due to other reasons, the safety valve will automatically open to exhaust.
(1) According to different use requirements, Programmable Switch Butterfly Valve have many specifications. The high inlet pressure is mostly, and the low inlet pressure is not less than 2.5 times the outlet pressure. There are many outlet pressure specifications, generally, and the high outlet pressure is.
(2) When installing the Control Valve, it should be determined whether its connection specifications are consistent with the joints of the cylinder and the use system. The Control Valve and the cylinder are connected by a hemispherical surface, and the two are completely matched by tightening the nut. Therefore, the two hemispherical surfaces should be kept smooth during use to ensure good airtightness. Dust can be blown away with high-pressure gas before installation. If necessary, materials such as polytetrafluoroethylene can also be used as gaskets.
(3) When stopping work, the remaining air in the Control Valve should be released, and then the adjusting screw should be loosened to prevent the elastic element from being deformed under pressure for a long time.
(4) Programmable Switch Butterfly Valve should be strictly prohibited from contacting grease to avoid fire accidents.
(5) The Control Valve should be protected from impact and vibration and should not come into contact with corrosive substances.