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保温螺杆泵是一种容积式泵，显著的优点是结构简单、体积小，允许高转速工作平稳可靠、压力脉动小、流量稳定、噪音低、效率高，正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脏内，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。
三螺杆保温沥青泵是依靠泵体与螺杆所形成，当主动螺杆转动时，带动与其啮合的从动螺杆一起转动，吸入腔一端的螺杆啮合空间容积逐渐增大，压力降低。液体在压差作用下进入啮合空间容积。当容积增至最大而形成一个密封腔时，液体就在一个个密封腔内连续地沿轴向移动，直至排出腔一端。这时排出腔一端的螺杆啮合空间容积逐渐缩小，而将液体排出。三螺杆泵的工作原理与齿轮泵相似，只是在结构上用螺杆取代了齿轮。
三螺杆保温沥青泵采用铸钢制成的泵体设有空心夹层，并设有进出口法兰，可用于导热油、蒸气、热水等媒体对输送的液体和泵进行加热保温及冷却。泵的进出口方向，在通常情况下按图示方向出厂即右进左出，如用户有特殊要求也可做成左进右出。
保温螺杆泵,保温三螺杆泵主要用于输送高黏度的润滑性沥青，该泵内部设有保温腔室与保温通道，允许气体或液体作为热载体，一般工作温度≤250℃。
1、三螺杆沥青保温泵与电动机采用弹性联轴器连接，安装在铸铁底盘上。
2、三螺杆沥青保温泵的进出油口和加热管进出油口，均采用标准法兰连接（GB/T9116-2000).
3、三螺杆沥青保温泵的轴端密封采用多级回流式耐高温填料密封，密封性能可靠。
4、三螺杆沥青保温泵主要有泵体、螺杆套、螺杆、前后盖以及轴端密封装置等主要零部件组成。泵体和泵盖等零部件材料均采用铸造碳素结构制造。螺杆采用优质碳素结构钢并经热处理具有较高的强度和耐磨性能。
3QGB保温螺杆泵技术参数：
| 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 | 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 | 1.5 | 5 | 90L-4-B3 | |
| 4 | 66 | 1 | 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 | 1.5 | 5 | 100L-6-B3 |
| 4 | 66 | 1 | 1.7 | 2.2 | 112M-6-B3 | |||
| 6.3 | 105 | 0.6 | 1450 | 1.5 | 2.2 | 100L1-4-B3 | ||
| 6.1 | 101 | 1 | 2.3 | 3 | 100L2-4-B3 | |||
| 54×2-46 | 8 | 133 | 0.8 | 970 | 2.3 | 3 | 5 | 100L-6-B3 |
| 8 | 133 | 1 | 1.5 | 2.2 | 112M-6-B3 | |||
| 14 | 233 | 0.6 | 1450 | 2.8 | 4 | 100L1-4-B3 | ||
| 14 | 233 | 4 | 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 | 3.18 | 4 | 132M1-6-B3 | |||
| 13.1 | 218.9 | 0.6 | 1450 | 3.15 | 4 | 112M-4-B3 | ||
| 12.6 | 210.5 | 1 | 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 | 3.6 | 5.5 | 132M2-6-B3 | |||
| 15.1 | 251 | 0.6 | 1450 | 3.6 | 5.5 | 132S-4-B3 | ||
| 14.6 | 243 | 1 | 5.5 | 7.5 | 132M-4-B3 | |||
| 80×2-36 | 17 | 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 | 417 | 1 | 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 | 8.6 | 11 | 160L-6-B3 | |||
| 36.6 | 610.3 | 0.6 | 1450 | 8.4 | 11 | 160M-4-B3 | ||
| 35.7 | 594.5 | 1 | 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 | 10.5 | 15 | 180L-6-B3 | |||
| 41.9 | 698.3 | 0.6 | 1450 | 9.6 | 11 | 160M-4-B3 | ||
| 41 | 684.1 | 1 | 16 | 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 | 8.52 | 11 | 160L-6-B3 | |||
| 37 | 615.9 | 0.6 | 1450 | 8.52 | 11 | 160M-4-B3 | ||
| 36.1 | 602.4 | 1 | 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 | 10.2 | 15 | 180L-6-B3 | |||
| 43.1 | 718.8 | 0.6 | 1450 | 10 | 15 | 160L-4-B3 | ||
| 41.9 | 698.5 | 1 | 15.5 | 18.5 | 180M-4-B3 | |||
| 90×2-46 | 34 | 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 | 866 | 0.8 | 14.9 | 18.5 | 180M-4-B3 | |||
| 51.4 | 856.1 | 1 | 18.6 | 22 | 180L-4-B3 | |||
| 100×2-46 | 48 | 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 | 1200 | 0.8 | 20.4 | 22 | 180L-4-B3 | |||
| 71.2 | 1187 | 1 | 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 | 20.8 | 30 | 225L-6-B3 | |||
| 86.9 | 1448.3 | 0.6 | 1450 | 19.1 | 22 | 180L-4-B3 | ||
| 85 | 1417.2 | 1 | 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 | 21.8 | 30 | 255M-6-B3 | |||
| 96.7 | 1611 | 0.6 | 1450 | 21.9 | 30 | 200L-4-B3 | ||
| 94.6 | 1577 | 1 | 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 | 24.5 | 30 | 255M-6-B3 | |||
| 108 | 1802 | 0.6 | 1450 | 24.7 | 30 | 200L-4-B3 | ||
| 105 | 1760 | 1 | 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 | 28.2 | 37 | 250M-6-B3 | |||
| 126 | 2101 | 0.6 | 1450 | 28.5 | 37 | 225S-4-B3 | ||
| 123 | 2059 | 1 | 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 | 54.5 | 75 | Y315S-6-B3 | |||
| 241.7 | 4029.7 | 0.6 | 1450 | 53.8 | 75 | Y280S-4-B3 | ||
| 236.5 | 3942.2 | 1 | 82.2 | 90 | Y280M-4-B3 | |||