Dialog of the DEF

摘要

DIESEL EXHAUST FLUID IS GREAT FOR REDUCING NOx, BUT THE VALVES THAT REGULATE FLOW TO THE HEATING ELEMENT CAN OFTEN BECOME UNRESPONSIVE. THIS SOLENOID-POWERED GATE VALVE SHOULD ENSURE A LONG AND PRODUCTIVE INTERACTION Selective catalytic reduction (SCR) systems using diesel exhaust fluid (DEF) are now an established method for control of NOx emissions in diesel engines. However, because DEF systems have a freezing point of -11℃ (12°F), on occasion engine coolant must be circulated to the reservoir to thaw the fluid. Most systems have adopted poppet, diaphragm or spool valves to regulate flow to the DEF heating element; however, these valves are susceptible to contamination and do not perform well when a low pressure drop is required.