Control Valves - adding Kv or Cv values

Kv or Cv for control valves in series or parallel

Control Valves in Series

Control valves in series - flow coefficient

The resulting Kv or Cv for two control valves installed in series can be calculated as

1 / (Kvt)2 =  1 / (Kv1)2 + 1 / (Kv2)2                                       (1)

where

Kvt = resulting Kv

Kv1 = Kv valve 1

Kv2 = Kv valve 2

Control Valves in Parallel

Control valves in parallel - flow coefficient

The resulting Kv or Cv for two control valves installed in parallel can be calculated as

Kvt = Kv1 + Kv2                                            (2)

Related Topics

  • Control Valves - Control Valve terminology, bodies, trim, flow characteristics, Cv and Kv sizing, noise, actuators and positioners

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