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Product description:The valve installed by the main valve and outside the control pilot valve. Installed in the building bypass the protection of water supply system to protect the water supply area of the upper reaches of the main valve pressure to the water in the pressure exceeds the pressure relief valve set pressure relief valve to open, to prevent pipeline and equipment due to overpressure damage. The valve is mainly used for the relief of the high-rise building fire test of the circulatory system, the upgrading of products for spring-loaded safety valve.
Water Pressure Relief Valve,Low Pressure Relief Valve,Air Pressure Relief Valve,Hydraulic Pressure Relief Valve Hebei huahui valve Co.,ltd , http://www.civalve.com
Special structure special-purpose vehicles for handling aircraft fires and accidents that can spray fire extinguishing agents while driving. 
Airport fire truck
Airport fire truck airportcrashfire vehicle