... of housing, side gate, hydro-cylinder, cylinder cap, piston, piston rod, lock shaft, sealing parts, ram, etc. Oil well's sealing ... 5- The horizontal secondary seal equipment of side gate piston rod and sealing leakage hole not only guarantee the exchange ability ... &bottom connection:Flanged,studdedShanghai Jefa Machinery Co.,Ltd specialize in API 6A &16A products as below:1) Wellheads (casing/tubing ...