The latest Pibiviesse cage ball control valves are an enhanced second generation of control ball design based on a changeable internal cage that divides the pressure drop in stages. The attenuator plates, which are mounted on a replaceable cartridge, are offset by an optimally designed angle to obtain a number of significant control advantages: elimination of noise and high frequency vibration; turndown is increased to 250:1; lower torques; increased accuracy; ease of operation and guaranteed stability during throttling operation; zero leakage; anti-cavitation; and high CV and rangeability. The Pibiviesse cage ball valve is specially designed for reliable performance under even the most severe operating conditions and is based on their robust trunnion mounted ball valve design. The cage ball valve is used by process plant operators throughout the world and has been used on a wide variety of applications including loading arms flow control, gas to flare gas booster stations, metering and mixing stations in the oil and gas industries; compressor control and flow control by LNG plant operators; and compressor anti-surge, catalyst handling, and cavitation control in the petrochemical industries.