Single and double ram type bops are widely used in oilfield and offshore platform. They have the features of compact structure, easy handling and reliable seal. The pipe ram adopts the pressure increasing seal way, which makes it seal drill tool rapidly and efficiently, even remain its seal effect after the disappearance of fluid control pressure. The open or close of ram preventor and ram replacing are both hydraulically controlled. The onsite replacing of pipe ram and sealing parts saves much time. driving mode£ºmanual & hydraulic end connection£ºflanged and bolted working pressure£º2000~10000psi nominal bore£º90mm¡¢120mm¡¢179.4mm¡¢279.4mm¡¢346mm executive standard: api 16a and relevant specification Export packing