Lug Type Butterfly Valve PN16 GS Ductile Iron Disc Lug Type Butterfly Valve PN16 GS Ductile Iron Disc Lug Type Butterfly Valve PN16 GS Ductile Iron Disc Lug type butterfly valve PN16 Stainless Steel disc Lug Type Butterfly valve PN16 Stainless Steel disc Lug type butterfly valve PN16 Stainless Steel Flanged type triple-acting air release valve Flanged type single-acting air release valve + ball valve Double Flanged, double eccentric butterfly valve Double Flanged, double eccentric Butterfly Valve