ZSFC dry-type alarm valve dry rain alarm valve ductile iron dry alarm valve stainless steel dry alarm valve Shanghai dry alarm valve manufacturers imported dry rain alarm fire alarm valve inlet valve ZSFC dry-type alarm valve Product Description: ZSFC dry-type alarm valve is 1: 5 differential, manual reset valve outside. A dry sprinkler system water control valves. When the dry sprinkler system (dry system) for one or more nozzles only action, compressed gas pressure on the system side of the rapid decline in the formation of start pressure, the valve automatically opens, so that the water entering the system side of the pipe, and starting a fire alarm device. Dry alarm valve in place without the threat of freezing should be installed. Volume of dry pipe automatic sprinkler system should not exceed 1 500L: If there is exhaust pipe network volume should not exceed 3000L. The company produces a series of high-strength ductile iron, austenitic stainless steel dry alarm valve; there are 100,150,200 three sizes of dry alarm valve, can basically meet the needs of users. Produced by dry alarm valve sets of supply, the user simply to install according to the body flange height and flange dimensions, commissioning