Pneumatic valve in the pipeline explosion wave careful analysis of the reasons

（ ） Because the fire water system pressure to meet the most unfavorable points and full water column and the nozzle working pressure, so the fire water system of working pressure is greater than that of the drinking water system. Fire pump lift of the pump life is also high. Fire water system is in standby state, at ordinary times within the network media is almost stationary. When the fire is urgent to start the fire pump, quickly in the condition of high lift added medium to the network, the injection forming of the flow and head a shock wave. Once the shock waves reach of blast wave pneumatic valve requirements, will lead to 'explosion-proof wave pneumatic valve closure are unable to supply water system. Because of the high-rise building built higher, the working pressure of fire water system and fire pump head also choose more high, air defense basement in the underground part again, pipe network is the highest place, under pressure of shock wave is the biggest, 'explosion-proof wave pneumatic valve' is the biggest risk of closure.
（ ） Fire pump starts, as a result of failure to stop the pump switch, this rapid start-up will form the shock wave. And the pressure inside the pipeline network can appear suddenly drop water hammer, the formation of reverse shock wave. At this time the shock waves would be easy to achieve 'explosion-proof wave pneumatic valve' the action of pressure, lead to 'explosion-proof wave pneumatic valve closed. If failed to reset and restart the fire pump are unable to medium into my network. Other network access to the network through fire pump or a cistern after injection in medium, the medium of high velocity rapidly towards 'explosion-proof wave pneumatic valve', can also lead to 'explosion-proof wave pneumatic valve closed.
（ ） In dry type sprinkler system, water spray fire extinguishing system, preaction fire-fighting system, water curtain system, drench system and foam system, the 'explosion-proof wave pneumatic valve installation position if pneumatic valve is located in the rain or preaction pneumatic valve from the line, the' explosion-proof wave pneumatic valve 'both sides are hollow tubes, after the system action, a pressure medium moment full of pipes, formation of the shock wave caused' explosion-proof wave pneumatic valve closed. Medium cannot be crossed 'explosion-proof wave pneumatic valve' into the spraying pipe system, fire water system is immediately is paralyzed.
（ ） 'Blast wave pneumatic valve' after the impact lead to shut down, it will not be able to recover to a normally open state, subject to reset. 'Explosion-proof wave pneumatic valves' open/close state can't distinguish from the appearance, there is no automatic monitoring of opening and closing state of the device, such as in the daily maintenance of fire protection system in the process of formation of the shock wave, happen 'explosion-proof wave pneumatic valve closed and tend not to be found. Once the fire, fire water system were paralyzed, its consequence is unimaginable. To sum up, dedicated 'explosion-proof wave pneumatic valves in the fire water system is not suitable, easy to form the accident hidden trouble, and it is not easy to find. Ming bao pneumatic valve co. , LTD. Think, it is need to install this kind of special 'explosion-proof wave pneumatic valve', should be on both sides of the 'explosion-proof wave pneumatic valve' increase the by-pass pipe and by the pneumatic valve, normally open, closed, during the war to ensure the fire water system is in standby state.