The butterfly valve is operated by a handle or a worm gear. The disc are controlled by manual operators.
Manual Butterfly Valve
Spec
Model: BU6Valve Size: DN50-DN500 (2″ – 20″)Body Material: Ductile Cast IronValve Seat: Nylon Coated Ductile Iron / Stainless SteelRated Pressure: 1600 KPaOperator: Hand Lever / Gear OperatorValve Application: Cold and Hot Water Systems