1,self-owned Chinese invention patent 2,no need to change the ... 3,easy to operate and simple maintain Self-owned patent pulse backflush screen changer Specification1, Filtering area from ... 365 cm2 to 10000 cm2, initiative interationally (interational patent)2, No need to change the screen, but ... has been applied in the United States PS recycling machine. Its output is 1100kg/hr, filtration precision of ...