{
  "version": "packet03-v1",
  "curve_identity": {
    "pump_designation_chart": "1\u00d71\u00bd\u00d77\u00bc L IN-INI inline process",
    "rpm": 3550,
    "impeller_no": "R-3080",
    "closed_impeller": true,
    "historical_date": "1965-04-01",
    "rating": "2466-1",
    "brake_power_basis_SG": 1,
    "NPSH_label": "WATER",
    "test_water_temperature": "not stated; no other-fluidor-temperaturepermission"
  },
  "head_trim_curves": [
    {
      "impeller_diameter_in": 7.25,
      "samples": [
        [
          20,
          231
        ],
        [
          40,
          222
        ],
        [
          60,
          209
        ],
        [
          80,
          187
        ],
        [
          100,
          151
        ]
      ]
    },
    {
      "impeller_diameter_in": 6.75,
      "samples": [
        [
          20,
          188
        ],
        [
          40,
          180
        ],
        [
          60,
          166
        ],
        [
          80,
          141
        ],
        [
          100,
          110
        ]
      ]
    },
    {
      "impeller_diameter_in": 6,
      "samples": [
        [
          20,
          150
        ],
        [
          40,
          145
        ],
        [
          60,
          130
        ],
        [
          80,
          102
        ],
        [
          100,
          65
        ]
      ]
    }
  ],
  "maximum_trim_efficiency_and_calculated_power": [
    {
      "Q_USgpm": 40,
      "head_ft": 222,
      "efficiency_percent_graphical": 44,
      "hydraulic_hp_calculated_SG1": 2.242424242424242,
      "brake_hp_calculated_SG1": 5.096418732782369
    },
    {
      "Q_USgpm": 60,
      "head_ft": 209,
      "efficiency_percent_graphical": 52,
      "hydraulic_hp_calculated_SG1": 3.1666666666666665,
      "brake_hp_calculated_SG1": 6.0897435897435885
    },
    {
      "Q_USgpm": 80,
      "head_ft": 187,
      "efficiency_percent_graphical": 52,
      "hydraulic_hp_calculated_SG1": 3.7777777777777777,
      "brake_hp_calculated_SG1": 7.264957264957264
    },
    {
      "Q_USgpm": 100,
      "head_ft": 151,
      "efficiency_percent_graphical": 48,
      "hydraulic_hp_calculated_SG1": 3.813131313131313,
      "brake_hp_calculated_SG1": 7.944023569023569
    }
  ],
  "water_NPSH_samples": [
    [
      50,
      2.8
    ],
    [
      60,
      3.8
    ],
    [
      80,
      6.1
    ],
    [
      100,
      9.9
    ]
  ],
  "source_brake_power_contour_labels_hp": [
    3,
    5,
    7.5
  ],
  "source_BHP_comparison": "AtQ60/head209ft, recoveredefficiency\u224852%givescalculatedBHP\u22486.1 atSG1, betweenprinted5and7.5BHPcontours. Power output is independentlycalculated, notdigitizedcontinuousBHPcurve.",
  "reading_allowances": {
    "head_ft": 10,
    "efficiency_percentage_points": 3,
    "water_NPSH_ft": 1
  },
  "interpolation": "Piecewise linear only within each stated trimcurve; efficiency/power andNPSH restricted tosavedspans; no speed/trimextrapolation or affinity-lawfit.",
  "power_equation": "BHP=Q_USgpm*head_ft*SG/(3960*eta_fraction)",
  "NPSH_comparison": "CompareNPSHavailable atsameflowfluidandstatewithrequiredcriterion plusadoptedmargin; WATERcurvealone neither givesmargin norhotfluidcorrection.",
  "limits": [
    "Sourcecurve atonepump/speed; selectedreadingsnotgenericperformance",
    "No reconstructedminimumtrim becauseambiguoussmallfractionlabel notused",
    "No productselection/vendorqualification/minimumflow/shutoffacceptance",
    "EfficiencyandNPSHreadingsfromhistoricalwatercurve do notestablishviscous/hot/otherfluidcorrection"
  ]
}