The marine flanged plug valve is GB/T 593-1993 standard. Nominal diameter: DN20~80 Nominal working pressure: PN6(0.6MPa) Liquid water, seawater, lubricating oil and fuel for vessel pipeline system. Material table of main parts: Part Name Material Valve body, core ZQSn10-2, ZQSn5-5-5 Valve body HT200 CCS certified and GL, LR, DNV, BV,