Oxygen is special globe valves in the physical chemistry experiments, often want to use oxygen, nitrogen, hydrogen and argon gas, etc. These gases are generally stored in a dedicated high-pressure gas. 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. Directly under the oxygen valve for short. Oxygen valve belongs to compulsory sealed valve, the valve is closed, must be pressure on the disc, to force a sealing surface does not leak. When medium by disc below into the valve 6, the operating force needed to overcome the resistance, is stem and packing of the friction force and the thrust produced by medium pressure, close the valve strength is stronger than open the valve, so it's bigger, the diameter of the stem or stem top bending failure happens. From the valve seal, flange globe valve is replaced by the disc above the medium flow direction into the valve cavity, in medium pressure at this moment, close the valve of the force is small, and the strength of the valve, the valve stem diameter can be reduced accordingly. At the same time, in the role of media, this kind of valve is tight. in China 'three for' regulation, the flow of cut-off valve, shall be applied. The oxygen valve opens, the opening of the disc height, is 25% ~ 30% of nominal diameter, flow has reached maximum, said valve to full open position. So stop valve fully open position, should be determined by disc's schedule. type: according to the ministry of metallurgical industry the number of technical regulations of oxygen pipe network in iron and steel enterprises regulations adopted JY41W oxygen cut-off Industrial Valves. Oxygen cut-off valve is according to the pipeline operation characteristics and consideration of inflammable and explosive properties of oxygen medium, with safe, reliable and superior performance as design principles, and with reference to the oxygen safety regulations formulated by the ministry of metallurgical industry regulation and the design, manufacturing to ensure special oxygen oxygen pipe network safe operation of the valve. Full set company production of oxygen pipeline valve, valve JY41W oxygen special valve stainless steel valve, cut-off valve copper oxygen cut-off valve, JY41W oxygen special valve stainless steel valve, cut-off valve copper oxygen since put on the market for large and medium-sized steel mills, oxygen plant, petrochemical plant oxygen pipeline of high praise! Oxygen pipeline with stop valve body material with stainless steel or excellent flame-retardant copper alloy, sealing surface for ontology or D802 surfacing, the rest of the oxygen valve with stainless steel or copper alloy; Transmission part USES incombustible grease lubrication, oil and marked with obvious forbidden tags. In the special oxygen valve structure, stent use full close, and a guide in addition to electrostatic device, equipped with dust cap on the valve stem. Oxygen valve structure characteristics 1, for the nominal pressure PN 1 or more. 6 mpa, DNl25 ~ 200 oxygen valve adopts by-pass structure; DN250 ~ 500 USES out-of-band bypass valve structure. Its purpose is to reduce the valve before and after the valve pressure difference to avoid high temperature high velocity, high scouring and prevention, so as to ensure the safe operation of the oxygen pipe network, but also reduces the oxygen stainless steel globe valve operating torque. 2 the flow direction of medium, : PN 1 or more. 6 mpa, valve DN 100 or less oxygen medium by the disc into the disc above (below The low into the above) , a DN 125 medium or by disc BuFang into below ( High to low) O for DN 125 valve adopts medium or high in low flow, on the one hand, foot inside the needs of the by-pass valve structure, on the other hand, due to the effect of medium pressure valve closing force greatly reduced. 3, the oxygen valve is equipped with conducting electrostatic safety device, can avoid because of electrostatic generation. 4, compared with the normal cut-off valve, oxygen support parts of the globe valve adopts fully enclosed structure, and the compression packing can open the protective cover on the stent, have played an important role in oil dustproof. And there is a clear ban on oil mark. 5 all the parts, oxygen valve adopts strict degreasing process.
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