... 6A&16A 2.Application:well drilling 3.Power:Manual/hydraulic API hydraulic ram bop Standard:API 6AApplication:well drillingMaterial:forged steel ... . Ram BOP is mainly composed of housing, side gate, hydro-cylinder, cylinder cap, piston, piston rod, lock shaft, sealing parts, ram, ... rod can prevent the inter-leakage between well fluid and hydraulic oil. And installation and dismantling of packing set is ...