In DPF, the bypass system plays a role in opening or closing the bypass pipeline to control the flow of exhaust gas.When DPF is working normally, the bypass system is closed and the engine exhaust is purified by the purifier before being discharged.After the DPF completes the exhaust treatment during startup, the bypass system opens and the engine exhaust is directly discharged through the bypass pipe.The bypass system is not only the core component for the normal operation of the exhaust purifier,but also a key factor in ensuring the safe operation of the engine and the personal safety of the operators.Therefore,in the selection, installation,and maintenance of exhaust purifiers,the performance and reliability of bypass system are particularly important.
Composition of bypass system
①Bypass mechanism (valve body, valve core and valve plate, valve stem, actuator: ceramic terminal, high temperature resistant sheath signal control wire, enameled wire with high temperature resistance treatment).
②Bypass pipe (equal to the diameter of the inlet or outlet smoke pipes of the purifier).
③Pressure signal acquisition and transmission: The pressure sensor should be equipped with a heat pipe and heat dissipation fins.④Control system: electrical control box, control module, relay, indicator light, button and control circuit. The function is to display the working status of the purifier, process the collected signals, and output signals to the bypass system for opening or closing.
Factors affecting the performance of the bypass system
①Material selection
②Welding process
③Structural composition
④High temperature resistant electric actuator
⑤Control system: Back pressure signal acquisition sensor and signal transmission line
Advantages of Leelool bypass-system
Material selection：SUS304（Thickness≥10mm）
Welding process：Fish scale welding
Structural composition：Strengthening reinforcement
High temperature resistant design: pressure sensor heat dissipation bend pipe; The electric actuator adopts high-temperature resistant components with good craftsmanship; Bypass system shaft and sleeve elongation design
