Apr 7, 2011
Wing Lung emergency shut-off valve pneumatic valve new developed
For the current gas, ammonia pipeline technology, some drawbacks, Shanghai Valve Factory Yong Long pushed a comprehensive analysis and the development of pipeline ball valve – QDQ series pneumatic emergency shut-off valve. Comprehensive solution to the traditional products in the gas transportation deficiencies.
1. Because of pipeline transportation of natural gas desulfurization ago contains a lot of hydrogen sulfide (which is a highly toxic and corrosive gas.) Even after the desulfurization of natural gas, there are still remnants of hydrogen sulphide. Therefore, selection must be selected pipeline valve corrosion resistance to sulfur material;
2. The general city hundreds of kilometers of gas pipelines are data cables, only regular patrols, inspection, and sometimes complex pipeline through the region, the media may result in serious leakage of fire accidents. Especially closer to the pipeline from the city to prevent the leakage of the valve is particularly important;
3. Pipeline, once operational, not allowed to stop within a few years tin can, does not allow for a moment stopped, but there is no overhaul period. Series in the pipeline on the pipeline valve failure, serious consequences. Therefore, wearing parts of pipeline valves requires long life; control officers generally or in the station control room, requires a reliable control valve performance, and require protection and explosion-proof valves have their own measures. Especially the long opening of the valve, requiring mutations in the case being, done and accurate cut. Therefore, a focus on reliable control performance.
Pneumatic emergency shut-off valve is a combination of power balance, check valves, solenoid valves and pneumatic valves advantages, the use of cut-off valve of the lift structure and the principle of check valves to prevent the media back from the multi-spring pneumatic diaphragm actuator or floating piston actuator and valve components, the receiver signal conditioning instrumentation, control, cut off the fluid in process pipe, turn on or switch. Has a simple structure, responsive, reliable action and so on. Shut-off valve of the gas supply requirements of filtered compressed air, flows through the valve body of the media should be free of impurities and grain-free gas.
Emergency shut-off valve installed in the liquefied petroleum gas, natural gas, ammonia and gas pipeline, and supporting the use of remote gas sources, the use of air control valve to open – close to the pipeline or storage tank leaks or when the fire occurred, staff long distance speed manual in the air pressure relief, or when the temperature ≥ 80 ℃} {fusible alloy melts, and the cylinder automatic pressure relief valve, emergency shut-off valve fast closure of ≤ 5 seconds stanch, to play a security role . Widely used in chemical supply pipe network system, gas heat the factory floor, gas boiler room safety facilities and silicone bra accommodation.
