Control Valves - Adding Flow Coefficients for Valves in Series or Parallel

Control Valves in Series

The equivalent flow coefficient K_v or C_v for two control valves installed in series can be calculated as

1 / (K_vt)² =  1 / (K_v1)² + 1 / (K_v2)²                                       (1)

where

K_vt = resulting K_v

K_v1 = K_v valve 1

K_v2 = K_v valve 2

Control Valves in Parallel

The equivalent K_v or C_v for two control valves installed in parallel can be calculated as

K_vt = K_v1 + K_v2                                            (2)

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• Engineering ToolBox, (2008). Control Valves - Adding Flow Coefficients for Valves in Series or Parallel. [online] Available at: https://www.engineeringtoolbox.com/adding-kv-cv-d_1120.html [Accessed Day Mo. Year].

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