A Specification:DN50-DN150(GB)                DN50-DN400(DIN)                DN50-DN200 PN25(DIN) B Brief introduction to the product: Handwheel drive;epoxy coating is applied on the flanged connection surface;the ductile iron valve plate is rubber-clad and beset with bronze nuts,and service life is long.The product is installed at ground pipeline,and is applicable to manual operations.The rising height of valve plate may be judged.lt is mostly applied to fire fighting system. C Materials Valve body:Cast iron or ductile iron , epoxy spray coating Valve cap:Cast iron or ductile iron,epoxy spray coating Valve disc:Ductile iron coated with EPDM or NBR Valve stem:2Cr13