... , high strength and toughness, the surface hardness not less than HRC60.The material of sealing parts of valve body ... Nut4Valve Rubber5Valve Body6Valve Guide7Valve SeatMeanwhile, we also provide below spare parts.1Liner: 6 1/2", 7", 140mm, 150mm,160mm ... 140, 150, 170, 2303Valve assenbly: valve, seat and rubber4Crosshead5Extension rod6Crosshead Assembly7Gasket 8Oil seal 9O-ring 10Bearing 11Upper guide ...