Lowara 10SV 05CE022 1015L119S [67/72] The table is valid for the hazen williams coefficient c 100 cast iron pipework for steel pipework multiply the values by 1 41 for stainless steel copper and coate...

Lowara 10SV 04F015 1015L1181 [67/72] The table is valid for the hazen williams coefficient c 100 cast iron pipework for steel pipework multiply the values by 1 41 for stainless steel copper and coated cast iron pipework multiply the values by 1 85 when the equivalent pipeline length has been determined the flow resistance is obtained from the table of flow resistance the values given are guideline values which are bound to vary slightly according to the model especially for gate valves and non return valves for which it is a good idea to check the values supplied by manufacturers
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FLOW RESISTANCE
TABLE OF FLOW RESISTANCE IN BENDS, VALVES AND
GATES
The flow resistance is calculated using the equivalent pipeline length method according to the table below:
The table is valid for the Hazen Williams coefficient C=100 (cast iron pipework);
for steel pipework, multiply the values by 1,41;
for stainless steel, copper and coated cast iron pipework, multiply the values by 1,85;
When the equivalent pipeline length has been determined, the flow resistance is obtained from the table of
flow resistance.
The values given are guideline values which are bound to vary slightly according to the model, especially for gate
valves and non-return valves, for which it is a good idea to check the values supplied by manufacturers.
TABELLA LUNGHEZZA DI TUBAZIONE EQUIVALENTE
ACCESSORY
TYPE
25 32 40 50 65 80 100 125 150 200 250 300
45° bend 0,2 0,2 0,4 0,4 0,6 0,6 0,9 1,1 1,5 1,9 2,4 2,8
90° bend 0,4 0,6 0,9 1,1 1,3 1,5 2,1 2,6 3,0 3,9 4,7 5,8
90° smooth bend 0,4 0,4 0,4 0,6 0,9 1,1 1,3 1,7 1,9 2,8 3,4 3,9
Union tee or cross 1,1 1,3 1,7 2,1 2,6 3,2 4,3 5,3 6,4 7,5 10,7 12,8
Gate - - - 0,2 0,2 0,2 0,4 0,4 0,6 0,9 1,1 1,3
Non return valve 1,1 1,5 1,9 2,4 3,0 3,4 4,7 5,9 7,4 9,6 11,8 13,9
G-a-pcv-en_a_th
DN
Equivalent pipeline length (m)
TECHNICAL APPENDIX

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