What is Cast Iron Wafer Butterfly Shutoff? A wafer style butterfly shutoff is made to make the total removal of a control valve from a pipeline very easy, without influencing the stability of the line. In the 'wafer' version, the value is pushed in between or attached with flanges https://cast-iron-wafer-butterfly04699.59bloggers.com/38009485/recognizing-the-benefits-applications-industrial-piping-solutions-durable-cost-efficient-flow-control-remedy-valves-for-cast-iron-wafer-butterfly-valve