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用来输送温度≤150℃、粘度3-760cSt、不含固体颗粒、无腐蚀性、具有润滑性能的介质。
适用压力范围：0.6-2.5Mpa;
适用流量范围:0.6-123m3/h。
主要应用于燃油输送、液压工程、船舶工程，石化及其他工业。2、应用范围
1、介质为直线连续输送、无搅拌、无脉动。
2、振动小，噪音低。
3、压力高、效率高。
4、结构简单、拆装方便。
5、体积小，重量轻。
6、磨损轻微，寿命长。3、结构形式
一般采用机械密封。泵通过爪型联轴器由电动机驱动。从主轴外伸端向泵看，为顺时针旋转 4、材质
主、从螺杆16MnCrS5,40Cr,45,38CrMoALA
泵体：HT200,QT450-10,ZCuSn10Pl,ZG270-500 3G型通用螺杆泵按泵的用途分类共分为5个系列
| 系列代号 | 主要用途 | 性能范围 | |
| 流量m3/h | 压力MPa | ||
| 3G | 输送3-20oE润滑油,温度≤80℃, Luboilvisc3-20oE;temp≤80℃ | 0.6-570 | 2.5 |
| 3GR | 输送3-50oE重质燃油， 温度≤120℃,Heavyfeullilvisc3-50oE;temp≤120℃ | 0.6-570 | 2.5 |
| 3GR | 输送1.2-5oE轻质燃油,温度≤120℃, Lightfeuloilvisc1.2-5oE;temp≤120℃ | 0.6-570 | 1.6 |
| 3GW | 输送高温加热燃油,温度≤150℃,Hightempfeulheatedoil;temp≤150℃ | 0.6-363 | 1.6 |
| 3GN | 输送100oE高粘度油料, 温度≤80℃,Highviscoil100oE;temp≤80℃ | 0.6-636 | 2.5 |
3G型三螺杆泵性能参数表
| 型号 | 压力 | 流量 | 转速 | 汽蚀 | 效率 | 功率 | 型号 |
| 25×4-46 | 1.0 | 0.8 | 1450 | 4 | 62 | 0.75 | Y802-4 |
| 25×4-46 | 2.5 | 0.6 | 1450 | 4 | 60.6 | 1.5 | Y90L-4 |
| 25×4-46 | 1.0 | 2.0 | 2900 | 4.5 | 59.4 | 1.5 | Y90S-2 |
| 25×4-46 | 2.5 | 1.6 | 2900 | 4.5 | 69 | 3 | Y100L-2 |
| 30×4-46 | 1.0 | 1.6 | 1450 | 4.5 | 63.5 | 1.1 | Y90S-4 |
| 30×4-46 | 2.5 | 1.2 | 1450 | 4.5 | 61 | 2.2 | Y100L1-4 |
| 30×4-46 | 1.0 | 3.6 | 2900 | 5 | 60 | 2.2 | Y90L-2 |
| 30×4-46 | 2.5 | 3.2 | 2900 | 5 | 69 | 4 | Y112M-2 |
| 36×4-46 | 1.0 | 2.8 | 1450 | 4.5 | 66 | 2.2 | Y100L1-4 |
| 36×4-46 | 2.5 | 2.4 | 1450 | 4.5 | 66.5 | 4 | Y112M-4 |
| 36×4-46 | 1.0 | 6.5 | 2900 | 5 | 60.5 | 4 | Y112M-2 |
| 36×4-46 | 2.5 | 6 | 2900 | 5 | 72 | 7.5 | Y132S2-2 |
| 42×4-46 | 1.0 | 4.8 | 1450 | 5 | 62 | 4 | Y112M-4 |
| 42×4-46 | 2.5 | 4.2 | 1450 | 5 | 73 | 5.5 | Y132S1-4 |
| 42×4-46 | 1.0 | 10.5 | 2900 | 5.5 | 61 | 5.5 | Y132S1-2 |
| 42×4-46 | 2.5 | 10 | 2900 | 5.5 | 72 | 15 | Y160M2-2 |
| 45×4-46 | 1.0 | 6.3 | 1450 | 5 | 70 | 3 | Y100L2-4 |
| 45×4-46 | 2.5 | 5.9 | 1450 | 5 | 74 | 7.5 | Y132M-4 |
| 45×4-46 | 1.0 | 13.5 | 2900 | 5.5 | 60 | 7.5 | Y132S2-2 |
| 45×4-46 | 2.5 | 13 | 2900 | 5.5 | 75 | 15 | Y160M2-2 |
| 60×4-46 | 1.0 | 15.5 | 1450 | 5 | 71.3 | 11 | Y160M-4 |
| 60×4-46 | 2.5 | 14.5 | 1450 | 5 | 74 | 15 | Y160L-4 |
| 60×4-46 | 1.0 | 32 | 2900 | 5.5 | 63 | 18.5 | Y160L-2 |
| 60×4-46 | 2.5 | 31.5 | 2900 | 5 | 77 | 37 | Y200L2-2 |
| 70×2-46 | 0.6 | 24 | 1450 | 5 | 71 | 7.5 | Y132M-4 |
| 70×2-46 | 1.0 | 23.5 | 1450 | 5 | 75 | 11 | Y160M-4 |
| 70×2-46 | 1.6 | 22.5 | 1450 | 5 | 76 | 15 | Y160L-4 |
| 70×4-46 | 1.0 | 24.5 | 1450 | 5 | 72.5 | 18.5 | Y180M-4 |
| 70×4-46 | 2.5 | 23.5 | 1450 | 5 | 79 | 30 | Y200L-4 |
| 80×2-46 | 0.6 | 36.5 | 1450 | 5 | 72 | 11 | Y160M-4 |
| 80×2-46 | 1.0 | 35 | 1450 | 5 | 75.5 | 18.5 | Y180M-4 |
| 80×2-46 | 1.6 | 34.5 | 1450 | 5.5 | 76.5 | 22 | Y180L-4 |
| 80×4-46 | 1.0 | 37 | 1450 | 5.5 | 72 | 30 | Y200L-4 |
| 80×4-46 | 2.5 | 35 | 1450 | 5.5 | 78.1 | 45 | Y225M-4 |
| 100×2-46 | 0.6 | 72.5 | 1450 | 5 | 73 | 22 | Y180L-4 |
| 100×2-46 | 1.0 | 71 | 1450 | 5 | 77 | 37 | Y225S-4 |
| 100×2-46 | 1.6 | 60.5 | 1450 | 5 | 79 | 45 | Y225M-4 |
| 100×4-46 | 1.0 | 72.5 | 1450 | 5.5 | 73 | 55 | Y250M-4 |
| 100×4-46 | 2.5 | 70 | 1450 | 6 | 78.5 | 75 | Y280S-4 |
| S100×3-27 | 0.6 | 72 | 1450 | 6 | 62 | 22 | Y180L-4 |
| S100×3-27 | 1.6 | 70 | 1450 | 6 | 72 | 55 | Y250M-4 |
| S100×3-27 | 2.5 | 69 | 1450 | 6 | 74 | 75 | Y280S-4 |
| S120×3-27 | 0.8 | 123 | 1450 | 6 | 74.5 | 55 | Y250M-4 |
| S120×3-27 | 1.5 | 120 | 1450 | 6 | 76 | 90 | Y280M-4 |
| S120×3-27 | 2.5 | 115 | 1450 | 6 | 78.5 | 132 | Y315M-4 |
