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Total Dynamic Suction Lift or Head

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seungwon2

seungwon2

Mechanical
Apr 7, 2004
9
When calculating head of the system, I want to know the exact meaning of '+' or '-' for velocity head and friction head. Please kindly help me.

DSL = Static suction lift - velocity head at suction + total friction head in suction line

DSH = Static suction head + velocity head at pump suction flange – total friction head in suction line
 
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