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(19) <br />(S)% X (SRL) ) x ( ) <br />2.31x100 2.31x100 <br />+/- psi (20) <br />pressure due to elevation change <br />• PRESSURE VARIATION: <br />Sideroll Headloss (19) + Elev pressure Gain/Loss (20) <br />(DP) <br />x 100 <br />7 <br />TOTAL SIDEROLL HEADLOSS <br />WITH 5" LATERAL <br />_ (Sideroll Lenght {SRLx{Headloss {181) x (F) <br />(2.31) x (100) <br />( )x( )x( <br />2.31 x 100 <br />PRESSURE GAIN (or LOSS) DUE TO FIELD SLOPE _ <br />Note" Look at most restrictive conditions <br />in an entire field <br />*PRESSURE VARIATION MUST NOT EXCEED + / -10% OF DP. If flow control nozzles are <br />used, then 1' -10% pressure limit can he dealt with easily. <br />REQUIRED PRESSURE AT MAINLINE AT BEGINNING OF SIDEROLL (MPS) <br />For Level Laterals = (DP) + 0.75 (19) + 1 <br />+0.75( ) + 1 =_ (MPS) <br />MANIFOLD LENGTH (NIL)" =Field Length (L) - (1)(Sm) <br />_( ) -(1x60 ) _ ft (ML) <br />