Water Handling Equipment Guide - National Wildfire Coordinating ...

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FOAM GENERATING EQUIPMENT Foam Proportioners Pilot-Operated Relief Valve Concentrate Pump Foam Concentrate Metering Valve Check Valve Water Suction Line Pump Water Check Valve Venturi Foam Solution Discharge Figure 4—Balanced pressure pump proportioner schematic. of mix ratio from the control panel and waterflow from the flow sensor. The processor then commands a pump to deliver concentrate at a proportional rate. This proportioner is capable of providing more than one foam concentrate type when more than one storage container is linked to the pump. The pump runs only on demand. Flow Totalizer Foam Concentrate Shut-Off Valve Concentrate Pump Microprocessor Box Check Valve Water Suction Line Pump Water Flow Meter Water Check Valve Foam Solution Discharge Figure 5—Direct injection proportioner schematic. 121
FOAM GENERATING EQUIPMENT Foam Proportioners Table 3—Advantages and disadvantages of proportioning devices. Proportioners* Advantages Manually Automatic regulated regulating 1 2 3 4 5 6 7a 7b 8 9 Maintain desired mix ratio with changes in waterflow & pressure X X X X X Unlimited hose length X X X X X X X X Unlimited number of hose lines X X X X X X X X Easily adjusted mix ratios X X X X X X X X No moving parts X X X X X X No loss in water pressure X X X X X No loss or low loss in water pressure X X X X X X X X Operate from pressure source X X X X X X X X X Requires no equipment investment X Refill foam while operating X X X X X X X X Can indicate foam concentrate remaining X X X X X X X X X No external power required X X X X X X X Disadvantages Tank and pump corrosion X X X Plumbing corrosion X X X Pump cavitation X X X Possible pump priming difficulties X X X Foaming in tank X X X Water tank refill fluid level obscured X X X Clean water supply contamination X X X Removes lubricants from pump X X X Possible use of more concentrate than required X X X X X Possible use of less concentrate than required X X X X X Possible inconsistent dispersion of concentrate X X X X X Foam solution degradation X Cleaning required after every use X X X X X Specific waterflow requirements X Specific pressure requirements X X Limited nozzle elevation X X Must match hose length and nozzle X X Limited hose length and size X X High discharge pressure loss X X Cannot operate from water pressure source X Dependent on pump vacuum X Concentrate viscosity affected X X X X X X Concentrate resupply interrupts concentrate input X Requires auxiliary power X X X Accurate Water Flow Range Any flow, single mix ratio X X Single flow, single mix ratio without adjustment X X X X X Any flow, any mix ratio (between 0.1 and 1.0 percent for class A foam) X X X Initial Equipment Investment $ 0 - $ 500 X X X X X $ 500 - $1,000 $1,000 - $2,000 X $2,000 - $4,000 X X X $4,000 - $6,000 122 X
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C O O RDINATING G R O U P A Publica
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Water Handling Equipment Guide Fift
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Water Handling Equipment Guide Fift
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CONTENTS IV. APPENDIXES A. Nozzle F
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WATER PUMPING EQUIPMENT Pumps Note:
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WATER PUMPING EQUIPMENT Pumps—Min
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WATER PUMPING EQUIPMENT Pumps—Min
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WATER PUMPING EQUIPMENT Pumps —Li
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WATER PUMPING EQUIPMENT Pumps —Li
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WATER PUMPING EQUIPMENT Pumps —He
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WATER PUMPING EQUIPMENT Pumps—Flo
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WATER PUMPING EQUIPMENT Pumps—Mou
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WATER PUMPING EQUIPMENT Pumps —Mo
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WATER PUMPING EQUIPMENT Pumps —Re
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WATER PUMPING EQUIPMENT Pumps—Ret
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WATER PUMPING EQUIPMENT Pumps—Ret
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WATER PUMPING EQUIPMENT Pumps —Re
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WATER PUMPING EQUIPMENT Fire Engine
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WATER PUMPING EQUIPMENT Fire Engine
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WATER PUMPING EQUIPMENT Engine Data
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Page 77 and 78: WATER PUMPING EQUIPMENT Engine Data
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Page 110 and 111: WATER PUMPING EQUIPMENT Nonhighway
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Page 124 and 125: WATER PUMPING EQUIPMENT Plumbing G.
Page 126 and 127: FOAM GENERATING EQUIPMENT Foam Prop
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Page 132 and 133: FOAM GENERATING EQUIPMENT Compresse
Page 134 and 135: FOAM GENERATING EQUIPMENT Foam Nozz
Page 136 and 137: WATER DELIVERY COMPONENTS AND ACCES
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WATER DELIVERY COMPONENTS AND ACCES
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APPENDIXES A—Nozzle Flow Rates Fl
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APPENDIXES B—Pressure and Flow Ra
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APPENDIX C
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APPENDIXES C—Flow Determination,
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APPENDIXES C—Flow Determination,
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APPENDIX D
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APPENDIXES D—Service Test for Fir
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APPENDIX E
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APPENDIXES E—Specifications and S
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APPENDIX F
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APPENDIXES F—Metric System Equiva
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APPENDIXES F—Metric System Equiva
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APPENDIXES G—Suppliers This secti
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APPENDIXES G—Suppliers General Su
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APPENDIXES G—Suppliers J&J Acquis
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APPENDIXES H—Acronyms and Abbrevi
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APPENDIX I
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APPENDIXES I—Definitions Dacron
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APPENDIXES I—Definitions Oven agi
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APPENDIX J
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APPENDIXES J—Mobile Equipment Inp
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