Water supply and drainage engineering construction quality common fault: the installation of the specifications of the pneumatic valve, model does not meet the design requirements

such as pneumatic valve nominal pressure is less than the system test pressure; Water supply pipe when the pipe diameter less than or equal to the mm with brake pneumatic valve; The dry and riser of hot water heating using the pneumatic valve; Fire pump suction pipe adopts pneumatic valve adjustment.
consequences: affect the normal pneumatic valves open and close and regulate resistance, pressure, etc. Even result in the operation of the system, pneumatic valve damage was forced to repair.
measures: familiar with the application scope of all kinds of pneumatic valve, choose according to the requirement of the design specifications and types of pneumatic valves. Nominal pressure of the pneumatic valve to meet the requirements of the system test pressure. According to the requirements of construction specifications: water supply branch pipe diameter less than or equal to the mm should be adopted by the pneumatic valve; When the pipe diameter is more than mm brake should be adopted for the pneumatic valve. Dry and hot water heating control pneumatic valve, pneumatic valve gate should be adopted for fire pump suction pipe pneumatic valve should not adopt a butterfly.