The structure of the working principle of the oxygen pressure pneumatic valve

in the physical chemistry experiments, often should use oxygen, nitrogen, hydrogen and argon gas, etc. These gases are generally stored in a dedicated high-pressure gas cylinders. When used by reduced pressure pneumatic valve gas pressure drop to experiment the required range, after other fine tuning control pneumatic valve, make the gas input using the system. The most commonly used vacuum pneumatic valve, pneumatic valve as oxygen decompression or oxygen table.
oxygen pressure pneumatic valve working principle of the oxygen decompression
working principle of the pneumatic valve, pneumatic valve of high pressure oxygen decompression cavity connected with the cylinder, the 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.
opens first cylinders when using 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.
the reduced pressure pneumatic valve pneumatic valve is equipped with safety. It is to protect the vacuum pneumatic valve and the safe use of devices, and reduced pressure pneumatic valve malfunction signal device. If the valve gasket, valve damage, or due to other reasons, cause the outlet pressure to rise and more than a certain permission value, safety and pneumatic valve will automatically open the exhaust.
oxygen decompression using the method of pneumatic valve
( According to the different using requirements, oxygen pressure pneumatic valve has many specifications. The highest inlet pressure mostly, the minimum inlet pressure of not less than outlet pressure. Times. Outlet pressure and specifications, as commonly, top outlet pressure is.
　　( Installing a vacuum pneumatic valve shall determine whether the connection specification is consistent with the sub cylinder and use the system. Reduced pressure pneumatic valve and cylinder connected by half spherical, 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.
　　( Oxygen pressure pneumatic valve should be forbidden contact grease, in order to avoid fire accidents.
　　( When to stop working, should put a net the pressure-relief residual air in the pneumatic valve, then loosen the adjusting screw to avoid elastic element compression deformation for a long time.
　　( Reduced pressure pneumatic valve should avoid impact vibration, cannot be in contact with corrosive substances.
other gas reduced pressure pneumatic valve working principle
some gases, such as the permanent gas such as nitrogen, air, argon, oxygen pressure pneumatic valve can be used. But there are some gases, corrosive gases such as ammonia, requires special vacuum pneumatic valve. Common on the market there are nitrogen, air, hydrogen, ammonia, acetylene, propane, steam and other special pneumatic valve.
the reduced pressure pneumatic valve and pressure relief valve working principle, using method and matters needing attention and the oxygen pressure pneumatic valve is basically the same. However, should also be pointed out that: vacuum pneumatic valve is generally not used in other gases. In order to prevent misuse, and some special vacuum pneumatic valve and the use of special connection between the cylinder. Such as hydrogen and propane adopt left thread, also known as a reverse thread, when installation should pay special attention to.