Oxygen valve in the physical chemistry experiments, often need oxygen, nitrogen, hydrogen and argon gas, etc. These gases are generally stored in a dedicated high-pressure gas cylinders. When used by reducing valve gas pressure drop to experiment the required range, after other fine tuning control valve, make the gas input using the system. The most commonly used oxygen air valve for the oxygen pressure reducing valve, hereinafter referred to as oxygen table. A, the working principle of the oxygen valve oxygen high pressure cavity connected with the cylinder valve, low pressure chamber for gas exports, and to use the system. High pressure table for the cylinder value for the pressure of the gas storage. The low pressure table of outlet pressure can be controlled by the adjusting screw. When used to open the master switch, and then clockwise (low pressure gauge pressure adjustment screw, compress the main spring and transmission film, spring block and ejector and open the valve. Such imports of high-pressure gas by the high pressure chamber after the throttle pressure into the low pressure chamber, and the export system to work. Turn the adjusting screw, change the height of the valve to open, so as to regulate the amount of by high pressure gas and achieve the required pressure value. Oxygen valves are equipped with safety relief valve. It is to protect the pressure reducing valve and the safe use of devices, is also the pressure reducing valve malfunction signal device. If the valve pad, damage to the valve, or due to other reasons, cause the outlet pressure to rise and more than a certain permission value, safety valve will automatically open the exhaust. Second, the use of the oxygen valve ( 1) According to the requirements of different, there are many specifications oxygen pressure reducing valve. The highest inlet pressure mostly, the minimum inlet pressure not less than 2 of outlet pressure. 5 times. Outlet pressure and specifications, as commonly, top outlet pressure is. ( 2) Installing a pressure reducing valve shall determine whether the connection specification is consistent with the sub cylinder and use the system. Pressure reducing valve and cylinder adopt the half spherical connection, screw the nut on the two perfectly match. Therefore, when use should remain on the surface of the two hemispheres is bright and clean, in order to ensure a good airtight effect. Before the installation can use high pressure gas blowing dust. When necessary, can be materials such as ptfe gasket. ( 3) Oxygen valve should be forbidden contact grease, in order to avoid fire accidents. ( 4) Stop working, pressure reducing valve should be residual air in the net, then loosen the adjusting screw to avoid elastic element compression deformation for a long time. ( 5) Oxygen valve should avoid impact vibration, cannot be in contact with corrosive substances. Three, other oxygen valve, gas valve of the pressure reducing Industrial Valves use method and matters needing attention and the oxygen Industrial Valves are basically the same. However, should also be pointed out that: special pressure reducing valve is generally not to be used for other gases. In order to prevent misuse, and some special pressure reducing valve between the cylinder and the use of special connectors. Such as hydrogen and propane adopt left thread, also known as a reverse thread, when installation should pay special attention to. In this paper, the keyword search: long ding Industrial Valves supply information automatic control equipment co. , LTD
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