The urea pump is an important part of the urea solution injection metering system.Its main function is to extract the urea solution in the urea tank,maintain a certain pressure,and then transport it to the injection unit to meet the flow and pressure requirements of the injection metering system.

　　Introduction to urea pump

　　?Urea pump design

　　1．Positive displacement liquid pump design

　　2．Diaphragm design separates fluid from motor

　　3．Speed regulating motor speed 800-3500RPM

　　?Function

　　1．Provide pressure to injection valve

　　2．The main filter element filters urea

　　3．The urea inlet filter element prevents impurities from entering

　　?Anti-freeze design

　　1．When the pump is turned off,the pressure inside the pump will naturally decay(about 15 minutes)

　　2．The main filter element will not be damaged by freezing

　　3．The urea pump can withstand the expansion volume of urea after freezing

　　?Thawing ability

　　1.The coolant from the warmed-up engine is circulated in the urea pump to defrost it.

　　2.Directly thaws urea in the pump through the heat conduction characteristics of the metal structure

　　Urea pump working circuit diagram