Antifouling valve including the valve seat, valve cover, valve piece (PEEK) bolts, nuts and spring, valve body there is no airflow slot, since that is characteristic of the valve seat, valve cover the surface, an additional filter layer and anti-fouling layer, and valve covered with the spring to make appropriate technical improvements, making the composition of the gas valve in complex working conditions, air flow channel will not be sticky filth obstruction, valve seat and valve cover significantly reduced the adhesion force, so that the trajectories of the valve returned to normal, improve the valve so as to achieve 3 times more life, energy saving 5% -10% of good results