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Matters needing attention in sorting out the working mode of electric fire damper

Release Time：2021-07-15

Electric fire valve actuator according to the input signal changes and drive the valve stem to do straight stroke movement, and then open, close the valve or the valve to adhere to any opening, according to the input signal type, can be divided into three ways of working.
1. Passive switch signal mode: If your input is a passive switch, choose this mode. Please note that it is necessary to be a passive signal, such as a passive dry contact of a relay.
Working method: the actuator moves to the direction of opening or closing the valve respectively according to the on or off of the switch signal. if the switch signal is consistently adhered to, the actuator will continue to move until it reaches the position of fully opening or closing the valve, and actively stop. no matter the actuator moves in any position, only the condition of the switch signal needs to be changed (from on to off or from off to on) the fire valve, the actuators will all act in the opposite direction.
2. Current input mode: if your input is DC4-20mA current, choose this mode. working method: according to the size of the input current signal, the actuator can drive the valve stem to walk and stay in any position in the full stroke, and then finish the arbitrary scheduling of the valve opening degree.
3. Voltage input mode: if your input is DC0-10V V or 2-10V voltage, choose this mode. working method: the actuator can drive the valve stem to walk and stay in any position in the full stroke according to the size of the input voltage signal, and then finish the arbitrary scheduling of the valve opening degree.
The actuator of the electric fire damper drives the valve stem to make a straight stroke movement according to the change of the input signal, and then opens and closes the valve or the fire damper to stick to any opening degree. According to the different types of input signals, it can be divided into three operation forms, taking the passive light-on signal form as an example:.
Passive switch signal form: if your input is a passive switch value, choose this form. please note that it is necessary to be a passive signal, such as the passive dry contact of the relay. the actuator moves in the direction of opening or closing the valve respectively according to the on or off of the switch signal. if the switch signal of the electric fire damper insists all the time, the actuator will continue to move continuously until it reaches the position of fully opening or closing the valve and stops actively, no matter the actuator moves to any direction, as long as the condition of the switch signal changes (from on to off or from off to on), the actuator will move in the opposite direction.

Fire valve finishing fire control valve need to pay attention to what matters.
1. Regularly clean the outside of the regulating valve.
2. Regularly adjust the stuffing box and other sealing parts of the regulating valve. If necessary, replace the sealing parts and adhere to the tightness of the static and dynamic sealing points.
3. Regularly add smooth oil to the parts that need to be smooth.
4, timing of air or hydraulic filtration system for sewage and cleaning operations.
5. Check the connection status and corrosion status of each connection point regularly, and replace the connection parts if necessary.
Fire dampers are generally installed in the pipe of the mechanical smoke exhaust system, usually in an open state, open smoke when the fire breaks out, close when the smoke temperature in the smoke exhaust pipe reaches 280 degrees, and meet the requirements of smoke leakage and fire resistance integrity within a certain period of time, and have the effect of smoke isolation and fire resistance.