Retardant Contract: 2004 |
| Home > LAQA > Phos-Chek D75-R | ||
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| Lot Acceptance and Quality Assurance Information | ||
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| Phos-Chek D75-R | ||
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| Phos-Chek D75-R is a dry concentrate formulation that contains a mixture of monoammonium phosphate and ammonium sulfate as the fire retardant salts. D75-R is a high viscosity (1000-1600 centipoise), gum-thickened product. It contains viscosity stabilizers, corrosion inhibitors, and iron oxide color. An eductor or batch mixer is used to add the dry concentrate to the proper amount of water. Recirculation is required before loading the mixed retardant is into aircraft. | ||
| Product Type: | High-viscosity, gum-thickened, dry powder; batch or eductor-mixed. | |
| Qualification: | Qualified for use from a permanent or temporary base and can be applied from a fixed-wing airtanker or helicopter bucket. | |
| Use Level: | 1.20 pounds of dry retardant mixed with 1 gallon of water will produce 1.07 gallons of mixed retardant. Each gallon of mixed retardant contains the equivalent of 1.12 pounds of powder. | |
| Yield: | 1 ton of powder yields 1786 gallons of mixed retardant. | |
| Viscosity: | 1000-1600
centipoise (cP). Field measurement (Marsh funnel) 24-34 sec through the large tip. |
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| Salt Content: | 11.3
percent by weight active salt: 8.5 percent by weight AS, (NH4)2SO4 and
2.8 percent by weight MAP, NH4H2PO4. Field measurement (refractometer): A reading of 12.1 indicates a proper salt content. A reading between 11.25 and 13.25 indicates an acceptable salt content. |
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| Specific Weight: | 8.91 lb/gal of mixed retardant. | |
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E-mail: cjohnson12@fs.fed.usor szylstra@fs.fed.us |
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