外观形式不同 , 立式三螺杆泵是立着的而卧式泵是横卧着 . Different form appearance, vertical pump is standing and horizontal pump is lying.

    连接形式不同 , 立式三螺杆泵自下而上叠加连接 , 卧式泵纵向排列于底座上，立式三螺杆泵通称管道泵，电机与泵体是子口连接；卧式泵是采用联轴器与电机连接，需要定期找正。 Superposition of different connection forms, the vertical pump bottom-up connection, horizontal pump vertically on the base, known as vertical pump pipeline pump, motor and pump body is seam allowance;Horizontal pump is connected by shaft coupling and motor, need to find is on a regular basis.

    占地空间不同 , 立式三螺杆泵占地面积小而卧式泵占用面积大 . 。立式三螺杆泵组的占地比卧式泵小，不一定要打基础；卧式泵组设有底座，要打基础。 Covers an area of space is different, the vertical pump area small and horizontal pump takes up the area is large..Vertical pump group covers an area of smaller than horizontal pump, doesn't have to lay the foundation;Horizontal pump group has a base, to lay the foundation.

    维修难度不同 , 立式三螺杆泵检修难度大 , 如检修叶轮需将上部全部移去后方能进行 ; 而卧式泵相对容易 , 如 IS 型泵只要将进口管移去就能进行叶轮检修 . Maintenance difficulty is different, vertical pump maintenance is difficult, such as repair impeller should be the upper can all move to the rear;Horizontal pump easier, such as IS as long as the move imported tube type pump impeller repair can go.

    安装形式不同 , 立式三螺杆泵为整体连接 , 安装较易 ; 而卧式泵安装后需进行精度调整 . Different forms of installation, the vertical pump connection, for whole installation easier;But it's necessary for horizontal pump installed precision adjustment.

    卧式泵从经济上来说比立式三螺杆泵具有优势 .Horizontal pump economically than the vertical pump.