Friday, August 20, 2010

Parallel and Series Control Valve

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



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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