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 pipe very easy, without influencing the stability of the line. In the 'wafer' variation, the value is pressed in between or secured with flanges https://spencerjrsop.thezenweb.com/comprehending-the-conveniences-applications-industrial-piping-systems-sturdy-economical-flow-control-option-shutoffs-for-cast-iron-wafer-butterfly-valve-75775999