In order to be proficient in a variety of boiler maintenance methods, we must first master the basic principles and work flow of the boiler hot water circulating pump work, and now we will introduce to the next boiler hot water circulating pump Working principle and workflow. Hot Water Circulating Pump (Air Fluid Network in Asia) I. Hot Water Circulating Pump for Boiler The working principle of the boiler: When the boiler is started, after the system pressure is normal, the hot water circulating pump starts to drive the heating medium water to flow, and the water flow switch or water flow Sensor, the output water flow signal (switch signal or pulse signal) to the master, the master receives the water flow signal, start the fan before the cleaning, and testing various safety devices are normal, in the case of various safety devices normal , The ignition, and then open a valve, two valves, gas into the burner under the action of spark ignition gas combustion (in the ignition process, the fan is usually half-speed operation or power off by inertial operation, to be lit After combustion, the fan speed is determined based on the amount of gas. For gas proportional valve models, the proportional valve is divided into ignition current, minimum current, maximum current, and can be adjusted respectively), the flame is normally burned by ion flame detection, The device emits into the air or radiated, to achieve the purpose of heating. After reaching the set heating temperature, turn off the flame and enter standby mode. So repeated cycle. Second, the boiler hot water circulation pump work flow: normal heating system → normal pressure test system → hot water circulating pump → water flow switch or water flow sensor open → output water flow signal → → → before entering the wind turbine cleaning normal pressure, the safety device Normal → ignition (the fan enters low speed operation or enters power off and relies on inertial operation) → opens the first and second solenoid valves (the proportional valve automatically enters into the ignition gas quantity, the sub-valve enters into the small fire to ignite) → ignites the flame → the ion flame, Normal combustion, the fan into the normal speed → reach the set temperature → flame out → fan after cleaning, hot water circulating pump delay off. This article is published by the Asian Fluid Network, reproduced, please specify the Asian Fluid Network, to promote the service hotline: 4006030811, QQ: 4006030811, Editor: Yao Xiaoxia to read: pump valve pipe fittings Exhibition Water Expo Xiamen Maritime Exhibition Internet Forum Yiwu Fair loading mold ten brand 2016 exhibition information