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保温三螺杆泵是转子式容积泵，它是利用螺杆啮合原理，依靠旋转的螺杆在泵套内相互啮合，把被输送的介质封闭在啮合腔内，沿螺杆轴向连续匀速地推至排出口，为系统提供稳定的压力。
保温三螺杆泵适用于各种无腐蚀性油类及类似油和润滑性液体。输送液体的粘度范围一般为3.0-760mm2/s（1.2-100oE）,高粘度介质可通过加温降粘后输送。其温度不超过350℃。
公司生产的LQ3G保温螺杆泵（保温型沥青泵）主要用于输送高粘度和高温润滑性液体。常用于沥青重燃油、重齿轮油等介质的输送。热载体可以是蒸汽、热油和热水，冷载体可以是气体和液体。二、特点：
保温三螺杆泵的显著特点是结构简单、压力脉动小、流量稳定、工作平衡可靠、允许高转速、噪音低，效率高、寿命长、有自吸能力。三、用途及使用范围：
保温三螺杆泵广泛应用于石油、化纤、冶金、机械、电力、机床、船舶、玻璃、公路等各行各业。
保温三螺杆泵适用于输送燃料油、润滑油、液压油、原油、沥青及其它类似油的润滑油和润滑性液体。
保温三螺杆泵在工业领域中作润滑泵，在液压系统中作液压泵，在燃油系统中作输送及增压泵，在输油系统中作输送及加油泵。
流量范围0.2-600m3/h,最高工作压力可达6.3MPa。四、型号意义：
| 型号 | 流量 | 出口压力 MPa | 转速 r/min | 功率KW | 必需汽 蚀余量 | 电机型号 | ||
| m3/h | L/min | 轴功率 | 电机功率 | |||||
| 45×3-36 | 2.8 | 46 | 0.6 | 950 | 0.8 | 1.1 | 5 | 90L-6-B3 |
| 2.7 | 45 | 1.0 | 1.2 | 1.5 | 100L-6-B3 | |||
| 25 | 42 | 1.6 | 1.6 | 2.2 | 112M-6-B3 | |||
| 2.4 | 40 | 2.5 | 2.8 | 4 | 132M1-6-B3 | |||
| 4.2 | 70 | 0.6 | 1450 | 1.0 | 1.5 | 5 | 90L-4-B3 | |
| 4.0 | 66 | 1.0 | 1.7 | 2.2 | 100L1-4-B3 | |||
| 3.8 | 63 | 1.6 | 2.8 | 3 | 100L3-4-B3 | |||
| 3.5 | 58 | 2.5 | 4.3 | 5.5 | 132S-4-B3 | |||
| 45×2-46 | 4.2 | 70 | 0.6 | 950 | 1.0 | 1.5 | 5 | 100L-6-B3 |
| 4.0 | 66 | 1.0 | 1.7 | 2.2 | 112M-6-B3 | |||
| 6.3 | 105 | 0.6 | 1450 | 1.5 | 2.2 | 100L1-4-B3 | ||
| 6.1 | 101 | 1.0 | 2.3 | 3 | 100L2-4-B3 | |||
| 54×2-46 | 8.0 | 133 | 0.8 | 970 | 2.3 | 3 | 5 | 100L-6-B3 |
| 8.0 | 133 | 1.0 | 1.5 | 2.2 | 112M-6-B3 | |||
| 14 | 233 | 0.6 | 1450 | 2.8 | 4 | 100L1-4-B3 | ||
| 14 | 233 | 4.0 | 4.3 | 5.5 | 100L2-4-B3 | |||
| 62×2-43 | 8.58 | 143.4 | 0.6 | 950 | 2.06 | 3 | 5 | 132S-6-B3 |
| 8.25 | 137.9 | 1.0 | 3.18 | 4 | 132M1-6-B3 | |||
| 13.1 | 218.9 | 0.6 | 1450 | 3.15 | 4 | 112M-4-B3 | ||
| 12.6 | 210.5 | 1.0 | 4.86 | 7.5 | 132M-4-B3 | |||
| 62×2-46 | 9.8 | 163 | 0.8 | 950 | 2.9 | 4 | 5 | 132M1-6-B3 |
| 9.5 | 158 | 1.0 | 3.6 | 5.5 | 132M2-6-B3 | |||
| 15.1 | 251 | 0.6 | 1450 | 3.6 | 5.5 | 132S-4-B3 | ||
| 14.6 | 243 | 1.0 | 5.5 | 7.5 | 132M-4-B3 | |||
| 80×2-36 | 17.0 | 283.3 | 0.8 | 950 | 4.3 | 7.5 | 5.5 | 160M-6-B3 |
| 25.7 | 428 | 0.6 | 1450 | 5.4 | 7.5 | 132M-4-B3 | ||
| 25.0 | 417 | 1.0 | 8.5 | 11 | 160M-4-B3 | |||
| 80×2-46 | 23.9 | 398.5 | 0.6 | 950 | 5.5 | 7.5 | 5.5 | 160M-6-B3 |
| 23.1 | 386.3 | 1.0 | 8.6 | 11 | 160L-6-B3 | |||
| 36.6 | 610.3 | 0.6 | 1450 | 8.4 | 11 | 160M-4-B3 | ||
| 35.7 | 594.5 | 1.0 | 13.1 | 15 | 160L-4-B3 | |||
| 80×2-51 | 27.5 | 485.5 | 0.6 | 950 | 6.3 | 11 | 5.5 | 160L-6-B3 |
| 26.9 | 448.3 | 1.0 | 10.5 | 15 | 180L-6-B3 | |||
| 41.9 | 698.3 | 0.6 | 1450 | 9.6 | 11 | 160M-4-B3 | ||
| 41.0 | 684.1 | 1.0 | 16.0 | 18.5 | 180M-4-B3 | |||
| 90×2-36 | 24.2 | 403.5 | 0.6 | 960 | 5.52 | 7.5 | 5.5 | 160M-6-B3 |
| 23.6 | 394.6 | 1.0 | 8.52 | 11 | 160L-6-B3 | |||
| 37 | 615.9 | 0.6 | 1450 | 8.52 | 11 | 160M-4-B3 | ||
| 36.1 | 602.4 | 1.0 | 13 | 15 | 160L-4-B3 | |||
| 90×2-42 | 28.2 | 470.9 | 0.6 | 950 | 6.6 | 11 | 5.5 | 160L-6-B3 |
| 27.5 | 457.6 | 1.0 | 10.2 | 15 | 180L-6-B3 | |||
| 43.1 | 718.8 | 0.6 | 1450 | 10 | 15 | 160L-4-B3 | ||
| 41.9 | 698.5 | 1.0 | 15.5 | 18.5 | 180M-4-B3 | |||
| 90×2-46 | 34.0 | 566.7 | 0.8 | 950 | 9.7 | 11 | 5.5 | 160L-6-B3 |
| 52.6 | 875.4 | 0.6 | 1450 | 12 | 15 | 160L-4-B3 | ||
| 52.0 | 866 | 0.8 | 14.9 | 18.5 | 180M-4-B3 | |||
| 51.4 | 856.1 | 1.0 | 18.6 | 22 | 180L-4-B3 | |||
| 100×2-46 | 48.0 | 800 | 0.8 | 950 | 13.3 | 15 | 5.5 | 180L-6-B3 |
| 72.7 | 1212 | 0.6 | 1450 | 16.5 | 18.5 | 180M-4-B3 | ||
| 72.0 | 1200 | 0.8 | 20.4 | 22 | 180L-4-B3 | |||
| 71.2 | 1187 | 1.0 | 25.5 | 30 | 200L-4-B3 | |||
| 100×2-51 | 56.9 | 948.9 | 0.6 | 950 | 12.5 | 15 | 5.5 | 180L-6-B3 |
| 55.7 | 928.6 | 1.0 | 20.8 | 30 | 225L-6-B3 | |||
| 86.9 | 1448.3 | 0.6 | 1450 | 19.1 | 22 | 180L-4-B3 | ||
| 85.0 | 1417.2 | 1.0 | 31.8 | 37 | 225S-4-B3 | |||
| 110×2-46 | 60.9 | 1015 | 0.6 | 950 | 13.7 | 18.5 | 5.5 | 200L1-6-B3 |
| 58.9 | 951.7 | 1.0 | 21.8 | 30 | 255M-6-B3 | |||
| 96.7 | 1611 | 0.6 | 1450 | 21.9 | 30 | 200L-4-B3 | ||
| 94.6 | 1577 | 1.0 | 33.9 | 45 | 255M-4-B3 | |||
| 120×2-42 | 67.9 | 1131 | 0.6 | 950 | 15.5 | 18.5 | 5.5 | 200L1-6-B3 |
| 65.4 | 1090 | 1.0 | 24.5 | 30 | 255M-6-B3 | |||
| 108 | 1802 | 0.6 | 1450 | 24.7 | 30 | 200L-4-B3 | ||
| 105 | 1760 | 1.0 | 38.2 | 45 | 255M-4-B3 | |||
| 120×2-46 | 79.6 | 1327 | 0.6 | 950 | 17.8 | 22 | 5.5 | 200L1-6-B3 |
| 77.2 | 1285 | 1.0 | 28.2 | 37 | 250M-6-B3 | |||
| 126 | 2101 | 0.6 | 1450 | 28.5 | 37 | 225S-4-B3 | ||
| 123 | 2059 | 1.0 | 44.1 | 55 | 255M-4-B3 | |||
| 150×2-46 | 158 | 2640 | 0.6 | 950 | 34.6 | 45 | 5.5 | Y280S-6-B3 |
| 154 | 2582 | 1.0 | 54.5 | 75 | Y315S-6-B3 | |||
| 241.7 | 4029.7 | 0.6 | 1450 | 53.8 | 75 | Y280S-4-B3 | ||
| 236.5 | 3942.2 | 1.0 | 82.2 | 90 | Y280M-4-B3 | |||
