portable fire pump honda - srfdtraining.org fire pumps.pdf · discharges twice the pressure soft...
TRANSCRIPT
Objectives
• Identify the parts of the portable pump and pump equipment
• Perform field maintenance on the portable pump
• Set up and operate portable pump providing water
Information provided
• Pump description and hardware
• Pump Maintenance
• Pump set up and application
• References
Pump description
• Honda Model WH20X • 4 stroke, air cooled, single cylinder gas
engine, 9.9 cu in • Single stage centrifugal pump, 70 psi. max • Maximum of 130 GPM with open butt • Self priming 1 Minute @ 16.4 feet • Fuel tank 2.5 hour run time
Pump Hardware
• Brass Bag contents – ½” Nozzle Tip – Screwdriver – Hose clamp with spanner – Spark plug – Wrenches
• 10mm • Spark plug
– “O” rings – Ear plugs – Spare Priming Plug
Also a water container for Pump priming
Additional Pump Ware
• Foot Valve – One way check valve for
priming
• Rope – For Tying off equipment – Tying off shovel
• Shovel – For shallow water – Prevents sucking debris
Pump Maintenance
• Gasoline 86 octane or higher • Spark plug (NGK BPR6ES or equivalent)
Gap .7-.8mm • Carburetor sediment cup for cleaning • Oil; capacity .6 quarts, 10W-30 grade • Air cleaner; warm soapy water, dry, apply
oil
Field Expedient Repair • Same power unit as PPV fans
– Emergency field repair – Parts or Replacement
• Fuel sediment cup – Drain sediment or water – 10mm plug
• Cord breaks or spring fails – Remove housing (10mm) and wind cord to start motor
• Spark plug – 90% of portable pump failures are due to fouled plugs – After troubleshooting replace the sparkplug – Gap with sheet metal on exhaust, its close
Pull cord breaks
Remove pull cord assembly 3-10mm head bolts
Cooling fan with hub under pull assembly
NOTE: Notch for pull start
Field Pull Cord
Knotted utility rope in notch
Wind utility rope clockwise and give it a pull
Caution: Hub will be uncovered and spinning at high RPM
Caution: Hub will be uncovered and spinning at high RPM
Drafting
• Environmental consideration – Hydrocarbon leaks/spill near water supply
• Use plastic or salvage cover to limit hazard – Mud and soft soil
• Use wood/salvage cover/logs under pump protect pump from sinking or splattering mud over cooling fins
– Enclosed space • CO poisoning
What is a Footvalve?
• A 2 ½” check valve strainer for the
suction hose on our portable pumps, allows a pre-primed suction
• Reduces the time needed to completely
prime the suction hose and provide water from the pump
Fill method, Priming the hose
Submerge hose as deep as possible
Water Level
Lift hose, water remains in hose
Drafting
• Attach hard suction • Prime pump
– Foot valve method to fill hose – Fill pump case through prime plug hole
• Tighten all suction hoses – Wrench tight – Leaks reduce drafting capability
Start Pump and increase throttle
• Fill pump through priming cap • Ignition, fuel, choke on • Pull start, throttle up • Prime in less than 1 minute
Optimum Pump Performance
P 100’, 1 1/2” Hose Pump
½”nozzle 50-60 GPM
Draft height, pump performance and hose layout are some factors that influence actual flow
70 PSI pump Pressure -50 PSI ½ “ tip -12 PSI F.L =50-60 GPM
Performance in the Field Flows at
4 foot draft with 100’ of hose, ¾”
tip. Actual performance
varies
¼
Throttle
½
Throttle
Full
Throttle
1 ½ inch
30 GPM @
10 PSI N.P
65 GPM @
25 PSI N.P
85 GPM @
30 PSI/N.P
2 ½ Inch
35 GPM @
10 PSI N.P
70 GPM @
40 PSI N.P
90 GPM @
50 PSI N.P
Pressure Multiplier
• Need Pressure? – Elevation – Hose size and length – Friction loss
• Develop pressure by utilizing series pumping
• One pump supplying the next will double pressure. Volume will remain the same.
Pressure Multiplier First Stage Must be primed First!
Second Stage
Discharges twice the pressure
Soft hose between pumps visually shows cavitation
Volume Multiplier
Pump one
Pump two
Supply, double the volume
Construct the siamese! 2 double females, 1-double male
Clapper siamese reduces efficiency!
Fire Suppression
• Optimum pump operations include – Correct hoseline for application – Pump as close to water level as possible – Planning pressure or volume application
Hose lay theory Hose Size
Nozzle Pressure
Tip Size
GPM Single pump
Length’
Series pump(2) Length’
Parallel pump(2) Length’
1 ½” 50 3/8” 30 1000’ 4500’ N/A
1 ½” 50 ½” 50 250’ 1250’ N/A
1 ½” 50 ¾” 120 50’ 250’ N/A
2 ½” 50 1 1/8” 260 N/A N/A 100’
2 ½” 20/relay supply
N/A 130 1650’ 4000’ N/A
2 ½” 20/relay supply
N/A 260 N/A N/A 350’
Nozzle Tips
• Fog – Must use pumps in
series!! – 2 ½” rated at 50 psi
• Limited application
– 1 ½” tips operate at 100 and 75 psi
• Pump rated at 70 • Limited application
• Smooth Bore – Most useful for all
pump operations – Benefit from 50 psi tip
pressure – 1 ½” and 2 ½” tips