语言选择：
机号为№2.8～6的4-72型风机主要由叶轮、机壳、进风口等部分配直联电动机组成，机号为№6～20除上述部分外还有传动部分。（1） 叶轮由10片后倾翼形叶片焊接于曲线型轮盖与平板型的轮盘中间，均为钢板制造，并经过静、动平衡校正，空气性能良好，效率高，运转平稳。（2）机壳是用普通钢板焊接而成的蜗形体。机壳做成两种不同型式。№2.8～12机壳做成整体，不能拆开。№16、20的机壳制成两开式，沿中分水平面分为两半，用螺栓连接。（3）进风口制成收敛式流线型整体结构，装于风机的侧面；与轴向平行的截面为曲线形状，能使气体顺利进入叶轮，且损失较小。（4）传动部分由主轴、轴承箱、滚动轴承、带轮或联轴器组成。
4-72粮食储备库专用风机性能参数表
| 机号 | 转速r/min | 全压Pa | 流量m3/h | 功率KW | 电机型号 |
| 6C | 2240 | 1733-2734 | 10314-20628 | 15 | Y160L-4 |
| 6C | 2000 | 1380-2176 | 9205-18418 | 11 | Y160M-4 |
| 6C | 1800 | 1116-1760 | 8288-17056 | 7.5 | Y132M-4 |
| 6C | 1600 | 881-1389 | 7367-14734 | 5.5 | Y132S-4 |
| 6C | 1250 | 537-846 | 5756-11511 | 3 | Y100L2-4 |
| 6C | 1120 | 431-679 | 5157-10314 | 2.2 | Y100L1-4 |
| 6C | 1000 | 344-541 | 4605-9209 | 2.2 | Y100L1-4 |
| 6C | 900 | 278-438 | 4144-8288 | 1.5 | Y90L-4 |
| 6C | 800 | 220-346 | 3684-7367 | 1.1 | Y90S-4 |
| 8C | 1800 | 3143-3032 | 19646-25240 | 30 | Y200L1-2 |
| 8C | 1800 | 2920-2302 | 28105-36427 | 37 | Y200L2-2 |
| 8C | 1600 | 2478-2390 | 17463-22435 | 22 | Y180M-2 |
| 8C | 1600 | 1816-2303 | 24982-32380 | 30 | Y200L1-2 |
| 8C | 1250 | 1106-1507 | 13643-25297 | 11 | Y160M-4 |
| 8C | 1120 | 1166-1209 | 12224-15705 | 7.5 | Y132M-4 |
| 8C | 1120 | 887-1124 | 17487-22666 | 11 | Y160M-4 |
| 8C | 1000 | 929-963 | 10914-14022 | 5.5 | Y132S-4 |
| 8C | 1000 | 707-895 | 15614-20237 | 7.5 | Y132M-4 |
| 8C | 900 | 752-779 | 9823-12620 | 4 | Y112M-4 |
| 8C | 900 | 572-725 | 14052-18213 | 5.5 | Y132S-4 |
| 8C | 800 | 452-615 | 8732-16190 | 3 | Y100L2-4 |
| 8C | 710 | 468-485 | 7749-9956 | 2.2 | Y100L1-4 |
| 8C | 710 | 356-450 | 11085-14368 | 3 | Y100L2-4 |
| 8C | 630 | 280-381 | 6876-12749 | 2.2 | Y100L1-4 |
| 10C | 1250 | 1877-2373 | 34863-48797 | 37 | Y225S-4 |
| 10C | 1120 | 1505-1902 | 31237-43722 | 30 | Y200L-4 |
| 10C | 1000 | 1199-1514 | 27890-39038 | 18.5 | Y180M-4 |
| 10C | 900 | 970-1225 | 25101-35134 | 15 | Y160L-4 |
| 10C | 800 | 766-967 | 22312-31230 | 11 | Y160M-4 |
| 10C | 710 | 603-761 | 19082-27717 | 7.5 | Y132M-4 |
| 10C | 630 | 475-599 | 17571-24594 | 5.5 | Y132S-4 |
| 10C | 560 | 375-473 | 15618-21861 | 4 | Y112M-4 |
| 10C | 500 | 299-377 | 13945-19519 | 3 | Y100L2-4 |
| 12C | 1120 | 2172-2746 | 53978-75552 | 75 | Y280S-4 |
| 12C | 1000 | 1969-2185 | 48195-60397 | 45 | Y225M-4 |
| 12C | 1000 | 1729-1859 | 63953-67457 | 55 | Y250M-4 |
| 12C | 900 | 1399-1767 | 43375-60712 | 37 | Y250M-6 |
| 12C | 800 | 1376-1395 | 38556-41973 | 22 | Y200L2-6 |
| 12C | 800 | 1104-1321 | 45391-53966 | 30 | Y225M-6 |
| 12C | 710 | 869-1097 | 34218-47895 | 18.5 | Y200L1-6 |
| 12C | 630 | 684-883 | 30362-42498 | 15 | Y180L-6 |
| 12C | 560 | 673-682 | 26989-29381 | 7.5 | Y160M-6 |
| 12C | 560 | 540-646 | 31774-37776 | 11 | Y160L-6 |
| 12C | 500 | 430-543 | 24097-33728 | 7.5 | Y160M-6 |
| 12C | 450 | 434-440 | 21687-23610 | 4 | Y132M1-6 |
| 12C | 450 | 348-417 | 25532-30356 | 5.5 | Y132M2-6 |
| 12C | 400 | 275-347 | 19278-26983 | 3 | Y132S-6 |
