... ''-48'' Class 150-class600Wenzhou ONO Valve CO.,Ltd is a professional manufacturer of valve.Our products include globe valves,check valves ... ), 304, 316, 304L, 316L, 38CrMoAlA, 25Cr1MoV7) Packing: graphite 8) Operating type: worm gear, pneumatic actuatorDrawing and technique data sheet will be ... worked out for your confirmation before after place order. wafer type butterfly valve