... sealing, easy adjustment.Hot tags: Flange Type Butterfly Valve, China manufacturer, factory, mill, supplier, cheapFlange Concentric Butterfly ValveThe Flange Concentric Butterfly Valve is widely used for water ... .10, ASME B16.5, DIN 3202End connection: FF, RFOptional seating: resilient, NBR, EPDM, VITONActuators: manual, pneumatic, electric, hydraulic