Fisher Volume Booster

Volume boosters are used in conjunction with positioners on throttling control valves to increase stroking speed. 

Fisher volume boosters such as the 2625 and VBL incorporate fixed deadband, soft seat construction, and an integral bypass restriction to eliminate positioner saturation problems that can occur with volume boosters that do not have these features.

Volume boosters maintain positioner steady-state accuracy and deliver high-volume output for fast stroking when large, rapid input signal changes occur.

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