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ManualsBrandsDarley ManualsEngine Driven Clear Water PumpsDolphin Self-Priming High-Volume Floating Water Pump — 24,000 GPH, 11 HP 390cc Honda GXV390 Engine, 2 1/2in. Discharge/4in. Suction Ports

Prepared by: TED Rev.: 3

Approved by: TED 1 Date:01/22/03

1200552

Operator’s Manual Table of Contents

For Darley “DOLPHIN” Floating Fire Pump

Description, Operation & Maintenance, Lubrication------------------------------------------------- 1200552

Related Drawings ------------------------------------------------------------------------------------------- DHC1201

Operator Instructions – Definitions----------------------------------------------------------------------- 1200510

Chart – Discharge Nozzle Pressure ----------------------------------------------------------------------- 1201501

Chart – Friction Loss and Reach -------------------------------------------------------------------------- 1201502

Model: DOLPHIN

Pump Serial Number:

IF FURTHER INFORMATION IS NEEDED, CALL W.S. DARLEY & CO. AT

CHIPPEWA FALLS, WI. AT 800-634-7812 or 715-726-2650

Summary of content (14 pages)

PAGE 1
Operator’s Manual Table of Contents For Darley “DOLPHIN” Floating Fire Pump Description, Operation & Maintenance, Lubrication------------------------------------------------- 1200552 Related Drawings ------------------------------------------------------------------------------------------- DHC1201 Operator Instructions – Definitions----------------------------------------------------------------------- 1200510 Chart – Discharge Nozzle Pressure ---------------------------------------------------------------
PAGE 2
OPERATION INSTRUCTIONS “DOLPHIN” FLOATING PUMP WARNING: Do not use this pump for hose testing. Check engine oil level before starting engine. Read engine instructions before usage. PREPARATIONS FOR PUMPING This pump is equipped with a mechanical seal. Do not run pump dry or at high speed if not placed in water of adequate depth. Connect discharge hose to pump. Start engine. Place float pump in water immediately after starting. Float pump is self-priming.
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PAGE 4
OPERATING CHARACTERISTICS OF PUMPS CENTRIFUGAL PUMPS: A centrifugal pump develops pressure by centrifugal force of the liquid rotating in the impeller wheel. The pressure developed depends upon the peripheral speed of the impeller (increasing as the square of the speed) and it remains fairly constant over a wide range of capacities up to the maximum output of the pump, if speed remains constant.
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WATER HORSEPOWER - the theoretical power required to deliver a given quantity of water per minute against a given head. BRAKE HORSEPOWER -- Actual power as delivered by a motor or engine to a driven machine. PUMP EFFICIENCY -- The quotient of the water horsepower divided by brake horsepower required to produce it. WATER HAMMER -- a series of shock waves produced in a pipeline or pump by a sudden change in water velocity. A sudden change in flow velocity can result from rapid closure of valves.
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= 27.7 inches of water One foot of water = 0.43 pounds per square inch One inch of mercury = = 1.13 feet of water 0.49 pounds per square inch One cubic foot of water = = 62.4 pounds 7.5 gallons One gallon of water = = = = 231 cubic inches 0.13 cubic feet 8.34 pounds 3.8 liters One Imperial Gallon = 1.2 U.S. gallons Atmospheric Pressure (Sea Level) = = = Prepared by: AAD Approved by: TED 3 14.8 pounds per square inch 29.9 inches of mercury 34 feet of water Rev.
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TABLE NO. 2 DISCHARGE FROM SMOOTH BORE NOZZLE Pressures measured by Pitot gage.
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TABLE NO. 2 DISCHARGE FROM SMOOTH BORE NOZZLE Pressures measured by Pitot gage.
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Approximate Discharge From Different Nozzles at the end of Fifty Feet of Average, 2 1/2” Rubber Lined Fire Hose, for Various Pump Pressures with Discharge Gage Wide Open PUMP SIZE OF NOZZLE & GALLONS PER MINUTE PRESSURE 3/4 7/8 1 1 1/8 1 1/4 1 3/8 1 1/2 LBS 30 40 50 60 70 80 90 100 110 120 130 140 150 175 200 225 250 90 103 115 126 136 145 154 162 171 179 186 193 200 215 230 243 257 119 137 153 168 182 194 206 217 228 239 249 258 267 288 309 328 345 153 177 198 216 234 250 265 280 295 30
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TABLE NO. 4 Pump or Hydrant Pressure required to give Effective Nozzle Pressure through various Lengths of best Rubber Lined Hose.
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TABLE NO.
PAGE 12
Friction Loss in Fire Hose Loss in PSI per 100 Feet of Hose SIZE HOSE G.P.M. LINEN HOSE 1 1/2 2 2 1/2 3/4 10 1.0 13.5 15 2.2 20 3.6 25 5.5 30 8.0 1.9 40 13.0 3.2 50 20.0 4.9 1.6 60 28.0 7.0 70 37.0 9.0 80 47.0 90 59.0 100 72.0 1 BEST RUBER LINED HOSE 1 1/2 2 2 1/2 3.5 0.5 .1 29.0 7.2 1.0 0.3 50.0 12.3 1.7 0.4 75.0 18.5 2.6 0.6 105.0 26.0 3.6 0.9 180.0 44.0 6.1 1.5 67.0 9.3 2.3 2.2 96.0 13.5 3.3 3.1 131.0 17.0 4..3 11.5 3.8 171.0 23.
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TABLE NO. 7 Friction Loss in 15-year-old Steel Pipe Loss in PSI per 100 Feet of Pipe PIPE SIZE 1/8 1/4 3/8 1/2 3/4 1 1 1/4 1 1/2 2 2 1/2 3 4 6 8 G.P.M. 1 2.8 0.9 2 52.0 12.0 45.0 10.0 3.2 5 55.0 4.0 18.0 4.5 1.4 0.4 10 64.0 16.0 5.0 1.3 0.6 15 135.0 34.0 11.0 2.7 1.3 0.5 20 59.0 18.0 4.7 2.2 0.8 25 89.0 27.0 7.1 3.4 1.2 30 125.0 35 39.0 10.0 4.7 1.7 0.6 51.0 13.0 6.3 2.2 0.7 40 66.0 17.0 8.0 2.9 0.9 45 82.0 21.0 10.0 3.6 1.
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TABLE NO. 8 Resistance of Fittings Equivalent Lengths of Straight Pipe - Feet PIPE SIZE 1/2 Gate Valve 0.4 0.6 0.8 1.1 1.4 1.8 2.2 2.8 4.1 5.3 6.7 9.4 Global Valve 3.0 4.5 6.0 8.5 10.5 14.0 17.0 22.0 32.0 42.0 53.0 75.0 Angle Valve 1.4 2.0 2.7 3.8 4.8 6.3 7.9 10.5 14.5 18.5 23.0 33.0 Std. Elbow 1.1 1.5 2.0 2.8 3.5 4.7 5.8 7.5 11.0 14.0 18.0 24.0 45 Elbow 0.6 0.8 1.0 1.4 1.6 2.1 2.5 3.1 4.2 5.2 6.3 8.5 Long Sweep EI Str Run Tee Std.