Installing a recycle valve in parallel with the antisurge valve of a turbine-driven multistage (low pressure/high pressure) centrifugal compressor, in combination with control system modifications, ...

This is further accomplished as follows: • If the flow of Train 1 already equals that of Train 2 (i.e., FI 5134 = FI 5135), both trains' driver speeds are increased in proportion to the available high ...