Adding Kv or Cv values

Adding Kv or Cv when control valves are in series or parallel

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Control Valves in Parallel

control valves in parallel

The resulting Kv or Cv if two valves are installed in parallel can be calculated as

Kvt = Kv1 + Kv2  (1)

where

Kvt = resulting Kv

Kv1 = Kv valve 1

Kv2 = Kv valve 2

Control Valves in Series

control valves series

The resulting Kv or Cv if two valves are installed in series can be calculated as

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

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Related Topics

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

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