Service Contract No 2007 / 147-446 - Swaziland

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6 . 3 M a i n t e n a n c e S u r v e yWhen the impact of maintenance practices was evaluated, it was decided to classify theexisting maintenance practices followed by the producer, according to existing literaturesources as acceptable if it will not influence the performance of the system adversely andunacceptable/ineligible if it will impair the performance. The acceptable values are viewed asthe absolute minimum values for the sustaining of an acceptable Us value in the system.Table 7. Maintenance schedule for sprinkler irrigation systemsInspect the system for leakagesMonitor With each cycle AnnuallyCheck system pressure and system flow<strong>Service</strong> air valves and hydrantsCheck sprinklers for wear and replace springs,washers and nozzles where necessaryXXXXFlush mainlinesXTable 8. Maintenance practices implemented by FAMonitor Results ClassificationInspect the system for leakages Daily AcceptableCheck system pressure and system flow Never Unacceptable<strong>Service</strong> air valves and hydrants Attend to fault UnacceptableCheck sprinklers for wear and replace springs, washersand nozzles where necessaryNeverUnacceptableFlush mainlines Never UnacceptableThe following is a list of items that require urgent maintenanceIntake sump requires urgent attentionThe balancing dam is leakingPump and mechanical control valveInstallation of vacuum gauges and one pressure gauge before pump control valvesReplace all damaged and hardened gasketsReplace all worn male and female pipe fittingsMaphobeni Farmers Association Report - 2009 Page - 51 -
Attend to leakages in air valves, mainlines and hydrantsReplace all draglines that have more than three jointsReplace leaking and corroded hydromatics, pipelets, and sprinkler standsReplace plastic with brass, correctly sized and identical nozzlesReplace old and worn out sprinklers with the correct type of sprinklerFix malfunctioning scour valves.Hydromatics that burnt during harvesting must be replacedMaphobeni Farmers Association Report - 2009 Page - 52 -
Page 1 and 2:
Restructuring and DiversificationMa
Page 3 and 4:
DISCLAIMERThe contents of this repo
Page 5 and 6:
5.2 Delivery tests ................
Page 8 and 9:
LIST OF APPENDICESAppendix 1: SEB u
Page 10 and 11: 1 I N T R O D U C T I O NAssociatio
Page 12 and 13: pumps. 2 x Howden 100-400 in the ri
Page 14 and 15: 3.1.2 R e v i e w o f C o n t a c t
Page 16 and 17: 9 SCHEDULE OF BLOCKS THAT IRRIGATE
Page 18 and 19: Maphobeni Farmers Association Repor
Page 24 and 25: Based on equation 1 above the flow
Page 26 and 27: ReducersThe inlet on the pump sucti
Page 28 and 29: d1.5d0.5dd3d 3d 1.5dFigure 9. Spaci
Page 30 and 31: hf6375kQ4d2……………………
Page 32 and 33: Table 1. Pump and motor specificati
Page 34 and 35: Table 2. Irrigation pumps evaluatio
Page 36 and 37: Phase two river pump station‣ Pum
Page 38 and 39: Filters: 3%Capital Recovery Rate (C
Page 40 and 41: 4.3.1 M a i n l i n e s i z eThe So
Page 42 and 43: 5 F I E L D E V A L U A T I O N O F
Page 44 and 45: 5.1.2 S p r i n k l e r p r e s s u
Page 46 and 47: 0 L/4 L/2 3L/4 LL3L/4LL/2Test block
Page 48 and 49: Phase two booster Pumps running und
Page 50 and 51: The installation of this unit (on t
Page 52 and 53: Old AgePhase one of the irrigation
Page 54 and 55: The effects of different nozzles/em
Page 56 and 57: Interest RatesIt can be argued that
Page 58 and 59: 6 . 2 M a n a g e m e n t P r a c t
Page 62 and 63: 7 C O N S T R A I N T S T O E F F I
Page 64 and 65: phase one and two was found to be 1
Page 66 and 67: 8 R E C O M M E N D A T I O N STo e
Page 68 and 69: OVERALL MANAGEMENT AND MAINTENANCEM
Page 70 and 71: 10 L I T E R A T U R E R E F E R E
Page 72 and 73: 11 P R O D U C T I N F O R M A T I
Page 86 and 87: SEB usage for River pump station Ph
Page 88: Appendix 2: capital recovery factor
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Service Contract No 2007 / 147-446 - Swaziland

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