4497SQ Concentric butterfly valve with electric actuator wafer

Concentric disc made of stainless steel 1.4301, 1.4401 or ductile cast iron. EPDM/NBR replaceable loose liner protected against axial displacement .Stainless steel 1.4021 solid spline (not pinned) shaft with the bottom side seated in blind hole of the body. Three-slide bearings, special shaped loose liner to seal with the shaft crossing. Additional shaft sealing made of EPDM/NBR o-rings. Product marking according to : EN 19, EN 1074.