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PERFORMANCE DATA (cont)
FAN PERFORMANCE — HORIZONTAL DISCHARGE UNITS (cont)
LEGEND
*Motor drive ranges:
Low Range: 805-1007
High Range: 941-1176
All other rpms require field-supplied drive.
Refer to page 261 for general Fan Performance Data notes.
NOTE: Maximum continuous bhp is:
Low Range: 5.75
High Range: 8.63
581A300 (25 TONS) (Medium Heat Units)*
Airflow
(Cfm)
External Static Pressure (in. wg)
0.2 0.4 0.6 0.8 1.0
Rpm Bhp Watts Rpm Bhp Watts Rpm Bhp Watts Rpm Bhp Watts Rpm Bhp Watts
6,500 799 2,730 3.14 833 2,914 3.35 872 3,135 3.61 914 3,392 3.90 958 3,687 4.24
7,000 856 3,294 3.79 887 3,481 4.00 921 3,699 4.25 958 3,950 4.54 999 4,235 4.87
7,500 913 3,929 4.52 941 4,118 4.74 972 4,335 4.99 1006 4,582 5.27 1042 4,860 5.59
8,000 971 4,637 5.33 996 4,829 5.55 1024 5,046 5.80 1055 5,290 6.08 1088 5,562 6.40
8,500 1029 5,421 6.24 1052 5,617 6.46 1078 5,835 6.71 1106 6,077 6.99 1136 6,345 7.30
9,000 1087 6,285 7.23 1108 6,484 7.46 1132 6,703 7.71 1158 6,946 7.99 1185 7,211 8.29
9,500 1145 7,231 8.32 1165 7,433 8.55 1187 7,655 8.80 1211 7,898 9.08 1236 8,161 9.39
10,000 1203 8,262 9.50 1222 8,468 9.74 1243 8,693 10.00 1265 8,936 10.28 1288 9,199 10.58
10,500 1261 9,381 10.79 1279 9,592 11.03 1299 9,820 11.29 1319 10,065 11.58 1341 10,327 11.88
11,000 1320 10,592 12.18 1337 10,807 12.43 1355 11,038 12.70 1374 11,284 12.98 1394 11,547 13.28
11,500 1378 11,896 13.68 — — — — — — — — — — — —
12,000 — — —— — ——— ——— —— — —
12,500 — — —— — ——— ——— —— — —
581A300 (25 TONS) (Medium Heat Units)* (cont)
Airflow
(Cfm)
External Static Pressure (in. wg)
1.2 1.4 1.6 1.8 2.0
Rpm Bhp Watts Rpm Bhp Watts Rpm Bhp Watts Rpm Bhp Watts Rpm Bhp Watts
6,500 1005 4,020 4.62 1052 4,390 5.05 1100 4,791 5.51 1148 5,221 6.00 1195 5673 6.52
7,000 1041 4,555 5.24 1084 4,908 5.64 1128 5,294 6.09 1172 5,710 6.57 1217 6153 7.08
7,500 1080 5,168 5.94 1119 5,508 6.33 1160 5,878 6.76 1201 6,279 7.22 1242 6708 7.71
8,000 1122 5,862 6.74 1158 6,190 7.12 1195 6,548 7.53 1233 6,934 7.97 1272 7347 8.45
8,500 1167 6,638 7.63 1200 6,959 8.00 1234 7,305 8.40 1269 7,677 8.83 1304 8076 9.29
9,000 1214 7,499 8.63 1244 7,813 8.99 1275 8,149 9.37 1308 8,511 9.79 1340 8896 10.23
9,500 1262 8,447 9.72 1290 8,754 10.07 1319 9,084 10.45 1349 9,437 10.85 1379 9812 11.28
10,000 1312 9,482 10.91 1338 9,785 11.25 1365 10,110 11.63 1392 10,454 12.02 — — —
10,500 1363 10,608 12.20 1387 10,909 12.55 — — — — — — — — —
11,000 —— —————————————
11,500 —— —————————————
12,000 ———————————————
12,500 ———————————————
Bhp — Brake Horsepower Input to Fan
Watts — Input Watts to Motor
581A155-300