高压三螺杆泵流量较小，从动螺杆犹如细长杆。这样在加工和运行时不可避免的会产生挠度变形，会直接影响到螺旋型面之间的啮合间隙，以及从动螺杆螺旋面外圆和螺杆衬套内孔之间的间隙值。由于高压泵要求这些间隙值很小，从动螺杆的挠度变形就容易产生摩擦；间隙过大又会使泵容积效率下降。因此可采取对从动螺杆的螺旋段分段的方式来减小挠度。这种结构是考虑到从动螺杆是由密封腔内介质的压力驱动而旋转的这一工作特性，分段后并不妨碍各段的旋转，它们在排出腔压力的作用下，运行时分段处的接合面仍能紧密接触，旋转时犹如整体式从动螺杆一样。
HSA螺杆泵型号三：
HSA20R38U4PY HSAF20R38U4PY HSAD20R38U4PY HSAFK20R38U4PY HSAS20R38U4PY
HSA20R46U4PY HSAF20R46U4PY HSAD20R46U4PY HSAFK20R46U4PY HSAS20R46U4PY
HSA40R38U4PY HSAF40R38U4PY HSAD40R38U4PY HSAFK40R38U4PY HSAS40R38U4PY
HSA40R46U4PY HSAF40R46U4PY HSAD40R46U4PY HSAFK40R46U4PY HSAS40R46U4PY
HSA80R36U4PY HSAF80R36U4PY HSAD80R36U4PY HSAFK80R36U4PY HSAS80R36U4PY
HSA80R46U4PY HSAF80R46U4PY HSAD80R46U4PY HSAFK80R46U4PY HSAS80R46U4PY
HSA120R42U4PY HSAF120R42U4PY HSAD120R42U4PY HSAFK120R42U4PY HSAS120R42U4PY
HSA120R46U4PY HSAF120R46U4PY HSAD120R46U4PY HSAFK120R46U4PY HSAS120R46U4PY
HSA210R36U4PY HSAF210R36U4PY HSAD210R36U4PY HSAFK210R36U4PY HSAS210R36U4PY
HSA210R40U4PY HSAF210R40U4PY HSAD210R40U4PY HSAFK210R40U4PY HSAS210R40U4PY
HSA210R46U4PY HSAF210R46U4PY HSAD210R46U4PY HSAFK210R46U4PY HSAS210R46U4PY
HSA280R43U4PY HSAF280R43U4PY HSAD280R43U4PY HSAFK280R43U4PY HSAS280R43U4PY
HSA280R46U4PY HSAF280R46U4PY HSAD280R46U4PY HSAFK280R46U4PY HSAS280R46U4PY
HSA440R36U4PY HSAF440R36U4PY HSAD440R36U4PY HSAFK440R36U4PY HSAS440R36U4PY
HSA440R40U4PY HSAF440R40U4PY HSAD440R40U4PY HSAFK440R40U4PY HSAS440R40U4PY
HSA440R46U4PY HSAF440R46U4PY HSAD440R46U4PY HSAFK440R46U4PY HSAS440R46U4PY
HSA660R40U4PY HSAF660R40U4PY HSAD660R40U4PY HSAFK660R40U4PY HSAS660R40U4PY
HSA660R44U4PY HSAF660R44U4PY HSAD660R44U4PY HSAFK660R44U4PY HSAS660R44U4PY
