一、性能特点：
1.G4-73与Y4-73型锅炉通、引风机适用于火力发电厂中2-670t/h蒸汽锅炉的通、引风机系统；
2.G4-73亦可用于矿井通风及一般通风；
3.通风机输送的介质为空气，最高温度不得超过80℃；引风机输送的介质为烟气，最高温度不得超过250℃。
二、参考系数：
G4-73型主要能数 | ||||
型号及机号 | 转速 | 配用电机 | 流量 | 全压 |
8D | 1450 | 18.5-4 | 16156-30998 | 2104-1400 |
| 1450 | 30-4 | 23003-32079 | 2668-2559 |
9D | 1450 | 37-4 | 35052-44128 | 2440-1775 |
| 960 | 11-6 | 15229-29216 | 1163-775 |
| 1450 | 55-4 | 31554-60533 | 3309-2194 |
10D | 960 | 15-6 | 20891-29134 | 1437-1379 |
| 960 | 18.5-6 | 31834-40077 | 1315-958 |
| 730 | 7.5-8 | 15886-30475 | 829-553 |
| 1450 | 75-4 | 41999-47427 | 4008-3986 |
| 1450 | 90-4 | 53142-80570 | 3946-2659 |
11D | 960 | 22-6 | 27806-31400 | 1741-1734 |
| 960 | 30-6 | 35183-53343 | 1715-1160 |
| 730 | 11-8 | 21144-40562 | 1004-660 |
| 1450 | 132-4 | 54526-76040 | 4777-4582 |
| 1450 | 160-4 | 83088-104600 | 4366-3171 |
12D | 960 | 37-6 | 36100-45677 | 2075-2044 |
| 960 | 45-6 | 50344-69253 | 1990-1381 |
| 730 | 15-8 | 27451-30999 | 1196-1191 |
| 730 | 18.5-8 | 34734-52661 | 1178-797 |
| 1450 | 280-4 | 86586-120740 | 6541-6272 |
| 1450 | 315-4 | 131940-166100 | 5975-4333 |
14D | 960 | 75-6 | 57326-64735 | 2831-2819 |
| 960 | 90-6 | 72534-109970 | 2789-1888 |
| 730 | 37-8 | 43591-66425 | 1630-1491 |
| 730 | 45-8 | 72059-83624 | 1391-1086 |
Y4-73型主要能数 | ||||
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型号及机号 | 转速 | 配用电机 | 流量 | 全压 |
8D | 1450 | 11-4 | 16156-18244 | 1303-1298 |
| 1450 | 15-4 | 20442-30993 | 1284-868 |
| 1450 | 22-4 | 23003-32079 | 1651-1584 |
9D | 1450 | 30-4 | 35052-44158 | 1511-1100 |
| 960 | 7.5-6 | 15229-29219 | 721-481 |
| 1450 | 37-4 | 31554-44004 | 2041-1959 |
10D | 1450 | 45-4 | 48083-60533 | 1867-1359 |
| 960 | 11-6 | 20891-40077 | 891-594 |
| 730 | 5.5-8 | 15886-30475 | 515-343 |
| 1450 | 55-4 | 41999-47427 | 2474-2463 |
| 1450 | 75-4 | 53142-80570 | 2437-1646 |
11D | 960 | 18.5-6 | 27806-53343 | 1079-719 |
| 960 | 7.5-6 | 21144-29487 | 623-598 |
| 730 | 11-8 | 32220-40562 | 570-415 |
| 1450 | 90-4 | 54526-68992 | 2949-2905 |
| 1450 | 110-4 | 76040-104600 | 2829-1961 |
12D | 960 | 30-6 | 36100-69253 | 1285-856 |
| 730 | 11-8 | 27451-34734 | 742-731 |
| 730 | 15-8 | 38282-52661 | 712-495 |
| 1450 | 185-4 | 86586-109550 | 4029-3968 |
| 1450 | 220-4 | 120740-166100 | 3864-2676 |
14D | 960 | 55-6 | 57326-72534 | 1752-1726 |
| 960 | 75-6 | 79944-109970 | 1681-1167 |
| 730 | 22-8 | 43591-49225 | 1010-1006 |
| 730 | 30-8 | 55156-83624 | 995-674 |
| 960 | 110-6 | 85571-119330 | 2293-2200 |
| 960 | 132-6 | 130390-164150 | 2097-1526 |
16D | 730 | 45-8 | 65069-73480 | 1321-1316 |
| 730 | 55-8 | 82333-124820 | 1302-880 |
| 580 | 45-10 | 51699-99178 | 833-555 |
| 960 | 200-6 | 121830-169910 | 2908-2790 |
| 960 | 220-6 | 185650-233730 | 2659-1934 |
18D | 730 | 90-8 | 92648-129200 | 1674-1606 |
| 730 | 110-8 | 141170-177730 | 1532-1115 |
| 580 | 45-10 | 73610-102650 | 1055-1012 |
| 580 | 55-10 | 112160-141210 | 965-703 |
