English 
T: +86-15061978682
E:tracy_zhuang@czpalm.com
E:tracy_zhuang@czpalm.com
Furong Town Industry Zone, Wujin, Changzhou, Jiangsu, China 213118
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Nominal pressure: 2.8MPa
Test pressure: 4.2MPa
Applicable temperature: -50℃ ~ +120℃
Applicable medium: ammonia, fluorine,propane, etc.
Characteristics
QDJ421F28-W is made up of a main valve AM3 and an electromagnetic pilot valve AEVM (NC) a single step open emergency shut-off valve.
Equipped with manual closing and manual opening functions.
Operation
The inlet medium enters the solenoid valve through the internal channel. After the solenoid valve coil is energized, the medium enters the top of the upper piston, pushing the piston to move downwards and the valve opens
When encountering an emergency situation, cut off the power supply to the solenoid valve coil and close the pilot valve. The piston moves upward under the force of the spring to close the valve, quickly cutting off the flow of medium inside the pipeline.
Applications
Mainly used in hot air defrosting hot air pipelines and compressor exhaust pipelines. Control the power supply of the solenoid valve coil by PLC or remote control to close the main valve. This can quickly cut off the flow of medium in the pipeline. To provide safety protection in emergency situations.
Nominal pressure: 2.8MPa
Test pressure: 4.2MPa
Applicable temperature: -50℃ ~ +120℃
Applicable medium: ammonia, fluorine,propane, etc.
Characteristics
QDJ421F28-W is made up of a main valve AM3 and an electromagnetic pilot valve AEVM (NC) a single step open emergency shut-off valve.
Equipped with manual closing and manual opening functions.
Operation
The inlet medium enters the solenoid valve through the internal channel. After the solenoid valve coil is energized, the medium enters the top of the upper piston, pushing the piston to move downwards and the valve opens
When encountering an emergency situation, cut off the power supply to the solenoid valve coil and close the pilot valve. The piston moves upward under the force of the spring to close the valve, quickly cutting off the flow of medium inside the pipeline.
Applications
Mainly used in hot air defrosting hot air pipelines and compressor exhaust pipelines. Control the power supply of the solenoid valve coil by PLC or remote control to close the main valve. This can quickly cut off the flow of medium in the pipeline. To provide safety protection in emergency situations.
