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K value for Y branch

K value for Y branch

K value for Y branch

(OP)
Hi,

Can anyone give some advice on the K valve to use for a 45 y branch on a 760mm CLS pipe and 760 branch. We are looking to use a 45Y versus a 90 Deg branch connection to reduce headloss.

Assistance appreciated


Chris

RE: K value for Y branch

(OP)
Thanks for your help. The guide is comprehensive for a suppliers document.

Chris

RE: K value for Y branch

Using Miller - Internal flow systems (BHRA pub) fig 13.19
Pipe 1 is the 45deg offset
Pipe 2 is the straight thru pipe
Pipe 3 is the original pipe
Q1/Q3     0.12    0.3    0.55    0.7    0.9    1.0
K             0.8     0.6    0.4     0.3    0.4    0.45

The graph includes the variation of diameters on the other axis.  The values above are one axis where both pipes are the same diameter.

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