Oxygen valve in the physical chemistry experiments, often need oxygen, nitrogen, hydrogen, oxygen valve in the physical chemistry experiments, 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 pressure reducing valve, pressure reducing valve for oxygen or oxygen table. Oxygen valve working principle of the valve of the high pressure cavity connected with the cylinder, 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 Industrial Valves 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. 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. Other gases oxygen valve, pressure reducing valve of the pressure reducing valve use method and matters needing attention and the oxygen valve 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. Cause analysis 1 oxygen valve burning explosion. Rust, dust, welding slag in the piping and pipe wall or high temperature valve port friction burn this kind of situation is related to the kinds of impurities, particle size and air velocity, iron powder with oxygen combustion, and the particle size is fine, the lower the flash point; The faster the gas velocity, the more prone to burn. 2. The pipe or valve oil, low ignition point of the material such as rubber, ignition under high temperature. 3. Adiabatic compression produced by high temperature fuel combustion. before 15 mpa, the temperature is 20 ℃, and after the valve for atmospheric 0. 1 mpa, if open the valve block rate, oxygen valve after temperature according to the adiabatic compression formula of up to 553 ℃, it has reached or exceed certain substances of ignition. 4. High pressure pure oxygen fuel burning in the lower is the cause of oxygen pipeline valve burning. Oxygen tube and valve in high pressure pure oxygen, the risk is very big, the experiment proved that fire could detonate varies inversely with the pressure, these poses a great threat to oxygen piping and valves.
Shenzhen Mech Valve Trading Co., Ltd. has built its reputation on a commitment to providing quality products and services while rapidly responding to international needs for innovative products.
Shenzhen Mech Valve Trading Co., Ltd. is a company that offers reliable products. For customization, cast iron gate valve and resilient seal gate valve in different styles are also in the offer list. Click Mech Valve for more details.
Shenzhen Mech Valve Trading Co., Ltd. always believes that the average profitability of our company is sufficient.