We are leading company in china manufacture cast iron butterfly valve.house material is GGG40,
Design standard:GB12238 BS5155 EN593 AND API609,
Face to fact:according to EN558-1 series 13,EN558-1 series 14 AWWA C504.
Flange drilling:according to EN1092 PN10-16
Working temperature:NBR 0-70℃ EPDM 0-80℃
Coating Epoxy costing with thickness ≥250um