JY41 Oxygen special globe valve is based on the operation characteristics of the oxygen network and considering the flammable and explosive characteristics of the oxygen medium, with safety, reliability and superior performance as the design principle, and with reference to the provisions of the “Oxygen Safety Regulations” formulated by the Ministry of Metallurgical Industry of the People’s Republic of China designed and manufactured to ensure the safe operation of the oxygen network special valves.
Structural characteristics
1. Oxygen globe valve is made of excellent silicon brass or stainless steel casting, with high mechanical strength, wear resistance, good safety and other advantages. Used in the oxygen pipe, with the best explosion-proof and flame retardant performance, eliminate the unsafe factors on the oxygen pipe.
2. The sealing surface is made of stainless steel body processing or surfacing carbide, not easy to wear and abrasion, good sealing, no relative sliding between the valve disc and the valve body sealing surface when opening and closing, so the wear and abrasion are not serious, good sealing performance, long service life.
3. For valves with PN≤4.0MPa and DN < 200, a single disc structure is adopted, and the medium flows from below the disc into the upper part of the disc (that is, low into and high out); for valves with DN≥250, a double disc structure is adopted, and the medium flows from above the disc into the lower part (that is, high into and low out), which on the one hand meets the needs of the internal bypass valve structure. On the other hand, due to the effect of medium pressure, the closing force of the valve is greatly reduced. At the same time, for nominal pressure PN≥6.3MPa, DN250 ~ 500 adopts out-of-band bypass valve structure. The purpose is to reduce the pressure difference in front of the valve and behind the valve to avoid high flow rates, high scour and prevent high temperatures, thus ensuring the safe operation of the oxygen network and reducing the operating torque.
4. The support part adopts a fully enclosed structure, and the protective cover plate on the support can be opened when the packing is pressed, which plays the role of oil and dust prevention. And there is a clear oil prohibition mark.
5. The upper part of the valve stem is equipped with a dust-proof device, all valves in contact with oxygen are strictly degreased and oil-forbidden before assembly, and the packing and gasket are made of polytetrafluoroethylene, which can ensure safe and reliable sealing when used.
6. The valve is equipped with electrostatic safety device to avoid sparking due to static electricity. A ground screw is arranged on the valve body flange, and the static electricity of the valve is directly exported through the wire to ensure the safety of the valve.
