Grundfos KPG.1400.250.14.T.50.21.E.40 Handleiding

Grundfos Waterpomp KPG.1400.250.14.T.50.21.E.40

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Pagina 1/52

OPTIMISED

Design of

stormwater

tan ks

OPTIMISED Design of stormwater tanks

Stormwater tanks

grundfos wAter utility

THE CHALLENGE AHEAD ...........................................................................................................................................................3

STORMWATER TANKS IN DUTY-MODE OF OPERATION ................................................................................................ 7

FILLING ..................................................................................................................................................................................... 7

FIRST FLUSH ............................................................................................................................................................................8

RETENTION TIME ..................................................................................................................................................................8

RISK FOR OVERFLOW ..........................................................................................................................................................8

CLEANING AND MIXING ...................................................................................................................................................9

EMPTYING ............................................................................................................................................................................. 13

PHYSICAL DESIGN OF STORMWATER TANKS ..................................................................................................................17

FORM AND SHAPE .............................................................................................................................................................17

BENCHES .............................................................................................................................................................................. 19

DIMENSIONS .......................................................................................................................................................................21

STORAGE VOLUME .............................................................................................................................................................22

INLET .......................................................................................................................................................................................23

OUTLET .................................................................................................................................................................................. 24

OPEN/CLOSED TANK CONFIGURATION ................................................................................................................... 29

OBSTACLES ...........................................................................................................................................................................30

SERVICE ACCESS ................................................................................................................................................................30

FLUSHjETS ....................................................................................................................................................................................32

CONSIDERATIONS FOR SIZING .....................................................................................................................................32

RECOMMENDATION FOR INSTALLATION AND POSITIONING .................................................................................35

RECTANGULAR TANKS ...................................................................................................................................................... 35

CIRCULAR TANKS WITH SUMP PLACED AT THE WALL .........................................................................................37

CIRCULAR TANKS WITH CENTRE SUMP ................................................................................................................... 38

PIPING AND MANIFOLD .................................................................................................................................................40

PIPE INSTALLATION ...........................................................................................................................................................40

TUBE AND CHANNEL TANKS ........................................................................................................................................ 43

RECOMMENDATION FOR CONTROLS AND SET POINTS ............................................................................................ 44

CONTROL STRATEGY ........................................................................................................................................................ 44

EQUIPMENT FOR STORMWATER TANKS ..........................................................................................................................46

BIBLIOGRAPHY ..........................................................................................................................................................................49

DESIGN OF STORMWATER TANKS

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