FFZ75-3.5 Diverter is annular type diverter which will close and seal off on tubulars in the wellbore or completely seal off the open hole to full rated working pressure by compression of a rein reinforced packing unit. Any normal closing unit having a separate pressure regulator valve and sufficient accumulator volume can be used to operate the diverter .The hydraulic operating fluid may be clean, light petroleum hydraulic oil, or water with a water soluble oil added. In cold climates, anti-freeze should be added to prevent freezing. The closing time of the diverter is determined by the rate at which the hydraulic fluid can be delivered to the closing chamber. Minimum closing time is achieved by using short, large diameter control lines, large bore control valves, and a large accumulator volume.