Table 8-8 Useful life and annual maintenance costs for pumping plant components. Annual Maintenance Estimated useful life Item (% initial cost) (hours) (years) Well and casing 20 0.5 1.5 – Plant housing 20 0.5 5 – Pump, Centrifugal 32,000 50,000 15 3 5 – – Pump, turbine: Bowl(s) -about 50 percent of cost of pump 16,000 20,000 8 5 7 – – unit Column plumbing etc 32,000 40,000 15 3 5 – – Power transmission Gear head 30,000 15 15 V-Belt 6,000 4 8 5 7 – – Flat-Belt, rubber and fabric 10,000 6 10 5 7 – – Flat-Belt, leather 20,000 8 5 7 – Electric motor 50,000 70,000 25 35 1.0 3.0 – – – Diesel engine 28,000 14 22 14 22 – – Gasoline or distillate engine Air-cooled 8,000 8 12 8 12 – – Water-cooled 18,00 10–16 10 16 – Propane engine 28,000 14 22 14 22 – – Sources: USDA-NRCS. NEH 15, Chapter of 8, ‘Cost Pumping’ Wade and for Florida Citrus Irrigation of Florida, Borman. “Economic Considerations Systems.” Univ. IFAS,( 2003)
Table 8-8 Useful life and annual maintenance costs for pumping plant components. Item Estimated useful life Annual Maintenance (% initial cost) (hours) (years) Well and casing 20 0.5 – 1.5 Plant housing 20 0.5 – 5 Pump, Centrifugal 32,000 – 50,000 15 3 – 5 Pump, turbine: Bowl(s) -about 50 percent of cost of pump unit 16,000 – 20,000 8 5 – 7 Column plumbing etc 32,000 – 40,000 15 3 – 5 Power transmission Gear head 30,000 15 15 V-Belt 6,000 4 – 8 5 – 7 Flat-Belt, rubber and fabric 10,000 6 – 10 5 – 7 Flat-Belt, leather 20,000 8 5 – 7 Electric motor 50,000 – 70,000 25 – 35 1.0 – 3.0 Diesel engine 28,000 14 – 22 14 – 22 Gasoline or distillate engine Air-cooled 8,000 8 – 12 8 – 12 Water-cooled 18,00 10–16 10 – 16 Propane engine 28,000 14 – 22 14 – 22 Sources: USDA-NRCS. NEH 15, Chapter 8, ‘Cost of Pumping’ Wade and Borman. “Economic Considerations for Florida Citrus Irrigation Systems.” Univ. of Florida, IFAS,( 2003)
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