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DFG（DFRG）系列单级单吸立式管道离心泵为直联式管道泵结构，叶轮安装于电机加长轴上，具有运行平稳结构简单、维护检修简便、安装方便及占地面积省（与普通卧式泵比占地面积节省30%以上）等特点；产品符合GB/T5657-1994《离心泵技术条件（III）类》标准；可输送介质温度不超过105℃的清水或物理化学特性类似于清水的其他液体。
DFG管道热水泵产品特点
1、高效节能：采用CFD计算流体动力学，分析计算出泵内压力分布和速度分布关系、优化泵的流道设计，确保泵有高效的水力形线，提高了泵的效率。
2、安装、维修方便：立式管道式结构，泵的进出口能象阀门一样安装在管路的任何位置及任何方向，安装维修极为方便。
3、运行平稳，安全可靠：电机轴和水泵轴为同轴直联、同心度高，运行平稳，安全可靠。
4、不锈钢轴套：轴的机封位置是相对易被锈蚀之处，直联式泵轴一旦被锈蚀，易造成机械密封失效。DFG（DFRG）泵此处采用镶配不锈钢轴套，避免锈蚀发生，提高了轴寿命，降低了运行维护成本。
5、轴承：泵所配电机中，Y（Y2）280以下轴伸端轴承（包括Y180以下风叶端轴承）采用封闭式轴承，正常使用时，免电机轴承的维护保养。
6、机封：机械密封基件一般选用橡胶波纹管结构，将传统机械密封中轴上密封由O形圈的线密封改为橡胶件的两道面密封，在清水介质时提高了密封效果。
DFG管道离心泵结构图
| 立式管道泵结构图  | 1 | 取压塞 | ISG型结构说明： 1.泵与电机同端盖，轴向尺寸缩短，结构简单。 2.泵体上设有取压孔和放水孔。 3.泵体上设有排气阀，工作前能拐车放泵内空气。 4.泵体底部设有安装底板和螺栓孔，保证整体机组安装稳固。 |
| 2 | 排气阀 | ||
| 3 | 叶轮 | ||
| 4 | 机械密封 | ||
| 5 | 挡水圈 | ||
| 6 | 电机 | ||
| 7 | 轴 | ||
| 8 | 联体座 | ||
| 9 | 口十轮螺母 | ||
| 10 | 泵体 | ||
| 11 | 放水阀 |
三、工作条件
流量: 2～1400m3/h 扬程：5～130m
系统工作压力：≤1.6MPa 工作温度：普通型（DFG）-15℃ ～+ 80℃
热水型（DFRG）+80℃～ +105℃ 配套电机：绝缘等级：B级或F级
防护等级：IP44或IP54 环境温度：≤+40℃
电机类型：Y或Y2
DFG管道循环泵性能参数表
| 型号 | 流量 | 扬程 | 效率 | 转速 | 电机功率 | 汔蚀余量 | 重量 | |
| m3/h | L/s | （m） | （%） | （r/min） | （kw） | （NPSH）r | （kg） | |
| DFG125-100 | 96 | 26.7 | 13 | 82 | 2900 | 11 | 4 | 180 |
| 160 | 44.4 | 12.5 | ||||||
| 192 | 53.3 | 12 | ||||||
| DFG125-100A | 86 | 23.9 | 10.4 | 77 | 2900 | 7.5 | 4 | 125 |
| 143 | 39.7 | 10 | ||||||
| 172 | 47.8 | 9.6 | ||||||
| DFG125-125 | 96 | 26.7 | 22.6 | 80 | 2900 | 15 | 4 | 220 |
| 160 | 44.4 | 20 | ||||||
| 192 | 53.3 | 17 | ||||||
| DFG125-125A | 86 | 23.9 | 18 | 77 | 2900 | 11 | 4 | 210 |
| 143 | 39.7 | 16 | ||||||
| 172 | 47.8 | 13.6 | ||||||
| DFG125-160 | 96 | 26.7 | 36 | 78 | 2900 | 22 | 4 | 265 |
| 160 | 44.4 | 32 | ||||||
| 192 | 53.3 | 28 | ||||||
| DFG125-160A | 90 | 25 | 31.5 | 76 | 2900 | 18.5 | 4 | 230 |
| 150 | 41.7 | 28 | ||||||
| 180 | 50 | 24.5 | ||||||
| DFG125-160B | 83 | 21.7 | 27 | 73 | 2900 | 15 | 4 | 215 |
| 138 | 38.3 | 24 | ||||||
| 166 | 46.1 | 21 | ||||||
| DFG125-200 | 96 | 26.7 | 55 | 77 | 2900 | 37 | 5.5 | 395 |
| 160 | 44.4 | 50 | ||||||
| 192 | 53.3 | 46 | ||||||
| DFG125-200A | 90 | 25 | 48.4 | 76 | 2900 | 30 | 5.5 | 380 |
| 150 | 41.7 | 44 | ||||||
| 180 | 50 | 40.5 | ||||||
| DFG125-200B | 83 | 21.7 | 41.3 | 75 | 2900 | 22 | 5.5 | 320 |
| 138 | 38.3 | 37.5 | ||||||
| 166 | 46.1 | 34.5 | ||||||
| DFG125-250 | 96 | 26.7 | 87 | 75 | 2900 | 55 | 5 | 580 |
| 160 | 44.4 | 80 | ||||||
| 192 | 53.3 | 73 | ||||||
| DFG125-250A | 90 | 25 | 76 | 74 | 2900 | 45 | 5.5 | 490 |
| 150 | 41.7 | 70 | ||||||
| 180 | 50 | 84 | ||||||
| DFG125-250B | 83 | 21.7 | 65 | 73 | 2900 | 37 | 5.5 | 430 |
| 138 | 38.3 | 60 | ||||||
| 166 | 46.1 | 55 | ||||||
| DFG125-315 | 96 | 26.7 | 133 | 70 | 2900 | 90 | 5 | 790 |
| 160 | 44.7 | 125 | ||||||
| 192 | 53.3 | 119 | ||||||
| DFG125-315A | 90 | 25 | 117 | 70 | 2900 | 75 | 5 | 710 |
| 150 | 41.7 | 110 | ||||||
| 180 | 50 | 104.6 | ||||||
| DFG125-315B | 86 | 23.9 | 106.4 | 69 | 2900 | 75 | 5 | 705 |
| 143 | 39.7 | 100 | ||||||
| 172 | 47.8 | 95.2 | ||||||
| DFG125-315C | 80.5 | 22.4 | 96 | 67 | 2900 | 55 | 5 | 585 |
| 134 | 37.2 | 88 | ||||||
| 161 | 44.7 | 86 | ||||||
| DFG150-125 | 96 | 26.7 | 22.6 | 66 | 2900 | 11 | 4 | 210 |
| 160 | 44.4 | 24 | 76 | |||||
| 192 | 53.3 | 17 | 76 | |||||
| DFG150-125A | 90 | 25 | 18 | 77 | 2900 | 7.5 | 4 | 130 |
| 150 | 41.7 | 16 | ||||||
| 180 | 50 | 13.6 | ||||||
| DFG150-160 | 96 | 26.7 | 36 | 75 | 2900 | 22 | 4 | 270 |
| 160 | 44.4 | 32 | ||||||
| 192 | 53.3 | 27 | ||||||
| DFG150-160A | 90 | 25 | 32 | 76 | 2900 | 18.5 | 4 | 230 |
| 150 | 41.7 | 28 | ||||||
| 180 | 50 | 23.5 | ||||||
| DFG150-160B | 84 | 23.3 | 27 | 73 | 2900 | 15 | 4 | 220 |
| 140 | 39 | 24 | ||||||
| 168 | 46.7 | 21 | ||||||
| DFG150-200 | 140 | 38.9 | 13.8 | 68 | 1450 | 15 | 3 | 265 |
| 200 | 55.6 | 12.5 | 78 | |||||
| 260 | 72.2 | 10.6 | 78 | |||||
| DFG150-200A | 125 | 34.7 | 11 | 66 | 1450 | 11 | 3 | 244 |
| 176 | 49.7 | 10 | 76 | |||||
| 232.5 | 64.6 | 8.5 | 76 | |||||
| DFG150-200B | 84 | 23.3 | 41 | 75 | 2900 | 22 | 4 | 275 |
| 140 | 39 | 38 | ||||||
| 168 | 46.7 | 34 | ||||||
| DFG150-250 | 140 | 38.9 | 21.8 | 73 | 1450 | 18.5 | 3 | 300 |
| 200 | 55.6 | 20 | 79 | |||||
| 260 | 72.2 | 17 | 77 | |||||
| DFG150-250A | 129 | 35.8 | 18.5 | 72 | 1450 | 15 | 3 | 262 |
| 184.4 | 51.2 | 17 | 78 | |||||
| 240 | 66.7 | 14.4 | 76 | |||||
| DFG150-250B | 117 | 32.5 | 15.2 | 76 | 1450 | 11 | 3 | 241 |
| 167 | 46.4 | 14 | ||||||
| 217.5 | 60.4 | 12 | ||||||
| DFG150-315 | 140 | 38.9 | 33.8 | 70 | 1450 | 30 | 2.5 | 410 |
| 200 | 55.6 | 32 | 78 | |||||
| 260 | 72.2 | 28 | 73 | |||||
| DFG150-315A | 131 | 36.4 | 29.5 | 69 | 1450 | 22 | 3.5 | 335 |
| 187 | 51.9 | 28 | 77 | |||||
| 243 | 67.5 | 24.5 | 77 | |||||
| DFG150-315B | 121 | 33.5 | 25 | 76 | 1450 | 18.5 | 3.5 | 315 |
| 173 | 48.1 | 24 | ||||||
| 225 | 62.5 | 21 | ||||||
| DFG150-350 | 96 | 26.7 | 153.6 | 80 | 2900 | 110 | 5.5 | 970 |
| 160 | 44.4 | 150 | ||||||
| 192 | 53.3 | 142.8 | ||||||
| DFG150-350A | 90 | 25 | 145.6 | 70 | 2900 | 90 | 5.2 | 790 |
| 150 | 41.7 | 142 | ||||||
| 180 | 50 | 134.8 | ||||||
| DFG150-350B | 84 | 23.3 | 138.8 | 65 | 2900 | 75 | 5.5 | 705 |
| 140 | 39 | 135 | 76 | |||||
| 168 | 46.7 | 127.8 | 74 | |||||
| DFG150-400 | 140 | 38.9 | 53 | 68 | 1450 | 45 | 3.5 | 490 |
| 200 | 55.6 | 50 | 75 | |||||
| 260 | 72.2 | 44 | 71 | |||||
| DFG150-400A | 131 | 36.4 | 46.6 | 67 | 1450 | 37 | 3.5 | 454 |
| 187 | 51.9 | 44 | 74 | |||||
| 243 | 67.5 | 38.3 | 70 | |||||
| DFG150-400B | 122 | 33.9 | 40 | 73 | 1450 | 30 | 3.5 | 435 |
| 174 | 48.3 | 38 | ||||||
| 226.5 | 62.9 | 33 | ||||||
| DFG150-400C | 112 | 31.1 | 34 | 71 | 1450 | 22 | 3.5 | 365 |
| 160 | 44.4 | 32 | ||||||
| 208 | 57.8 | 28 | ||||||
| DFG150-250（I） | 120 | 33.3 | 87 | 65 | 2900 | 75 | 4.5 | 702 |
| 200 | 55.6 | 80 | 76 | |||||
| 240 | 66.7 | 72 | 74 | |||||
| DFG150-250（I）A | 112 | 31.1 | 76 | 64 | 2900 | 55 | 4.5 | 561 |
| 187 | 51.9 | 70 | 75 | |||||
| 224 | 62.2 | 63 | 73 | |||||
| DFG150-250（I）B | 104 | 28.9 | 65 | 63 | 2900 | 45 | 4.5 | 460 |
| 173 | 48.1 | 60 | 74 | |||||
| 208 | 57.8 | 54 | 72 | |||||
| DFG150-315（I） | 120 | 33.3 | 133 | 58 | 2900 | 110 | 4.5 | 980 |
| 200 | 55.6 | 125 | 73 | |||||
| 240 | 66.7 | 120 | 75 | |||||
| DFG150-315（I）A | 112 | 31.1 | 116 | 57 | 2900 | 90 | 4.5 | 800 |
| 187 | 51.9 | 110 | 72 | |||||
| 224 | 62.2 | 105 | 74 | |||||
| DFG150-315（I）B | 104 | 28.9 | 100 | 55 | 2900 | 75 | 4.5 | 724 |
| 173 | 48.1 | 95 | 70 | |||||
| 208 | 57.8 | 91 | 72 | |||||
| DFG200-200 | 140 | 38.9 | 13.8 | 68 | 1450 | 15 | 3 | 265 |
| 200 | 55.6 | 12.5 | 78 | |||||
| 260 | 72.2 | 10.6 | 78 | |||||
| DFG200-200A | 125 | 34.7 | 11 | 66 | 1450 | 11 | 3 | 244 |
| 179 | 49.7 | 10 | 76 | |||||
| 232.5 | 64.6 | 8.5 | 76 | |||||
| DFG200-250 | 140 | 38.9 | 21.8 | 73 | 1450 | 18.5 | 3 | 305 |
| 200 | 55.6 | 20 | 79 | |||||
| 260 | 72.2 | 17 | 77 | |||||
| DFG200-250A | 129 | 35.8 | 18.5 | 72 | 1450 | 15 | 3 | 267 |
| 184.4 | 51.2 | 17 | 78 | |||||
| 240 | 66.7 | 14.4 | 76 | |||||
| DFG200-250B | 117 | 32.5 | 15.2 | 76 | 1450 | 11 | 3 | 246 |
| 167 | 46.4 | 14 | ||||||
| 217.5 | 60.4 | 12 | ||||||
| DFG200-315 | 140 | 38.9 | 33.8 | 70 | 1450 | 30 | 3.5 | 417 |
| 200 | 55.6 | 32 | 78 | |||||
| 260 | 72.2 | 28 | 78 | |||||
| DFG200-315A | 131 | 36.4 | 29.5 | 69 | 1450 | 22 | 3.5 | 342 |
| 189 | 51.9 | 28 | 77 | |||||
| 243 | 67.5 | 24.5 | 77 | |||||
| DFG200-315B | 121 | 33.6 | 25 | 76 | 1450 | 18.5 | 3.5 | 322 |
| 173 | 48.1 | 24 | ||||||
| 225 | 62.5 | 21 | ||||||
| DFG200-400 | 140 | 38.9 | 53 | 68 | 1450 | 45 | 3.5 | 498 |
| 200 | 55.6 | 50 | 75 | |||||
| 260 | 72.2 | 44 | 71 | |||||
| DFG200-400A | 131 | 36.4 | 46.6 | 67 | 1450 | 37 | 3.5 | 462 |
| 187 | 51.9 | 44 | 74 | |||||
| 243 | 67.5 | 38.3 | 70 | |||||
| DFG200-400B | 122 | 33.9 | 40 | 73 | 1450 | 30 | 3.5 | 443 |
| 174 | 48.5 | 38 | ||||||
| 226.5 | 62.9 | 33 | ||||||
| DFG200-400C | 112 | 31.3 | 34 | 71 | 1450 | 22 | 3.5 | 373 |
| 160 | 44.4 | 32 | ||||||
| 208 | 57.8 | 28 | ||||||
DFG管道离心泵性能曲线
