Models Thickener - 22m 30 747 3 Valve Knife HW ø12"-Newcon 20 679 0 Valve Knife model KGD ø16"-Clarkson 12 179 0 Valve Knife model KGD ø12"-Clarkson 9 191 0 Valve Pinch ø16" 5 122 0 Valve Pinch ø12" 2 111 0