选型时必须考虑泵的吸上性能(尤其是对于船用泵和码头用泵)和介质的粘度、润滑性是否含有杂质和腐蚀性等来确定选用泵的类型及泵的结构、材料等，还需要考虑泵进口处过滤器的滤网目数、出口处是否需要有片式过滤器等等，这些都会直接影响到产品运行的可靠性和产品寿使用命。
螺杆和螺杆衬套的材料选用
输送腐蚀性介质时有关零件材料应考虑腐蚀性，螺杆应采用不锈钢；输送含杂质的液体介质时必须开了螺杆旋套和螺杆衬套有足够的耐磨擦性，国外有采用表面涂层，提高表面硬度；输送燃油重油等粘度大的介质时衬套应考虑锡青铜。
SMH卧式三螺杆泵型号(SMH卧式安装、SMS立式安装、SMF法兰式安装、SME插装式安装)(R为右旋，L为左旋)
SMH40R38E6.7W23 SMH40R38U8W23 SMH40R38U12.1W23
SMH40R46E6.7W23 SMH40R46U8W23 SMH40R46U12.1W23
SMH40R54E6.7W23 SMH40R54U8W23 SMH40R54U12.1W23
SMH80R36E6.7W23 SMH80R36U8W23 SMH80R36U12.1W23
SMH80R42E6.7W23 SMH80R42U8W23 SMH80R42U12.1W23
SMH80R46E6.7W23 SMH80R46U8W23 SMH80R46U12.1W23
SMH80R54E6.7W23 SMH80R54U8W23 SMH80R54U12.1W23
SMH120R42E6.7W23 SMH120R42U8W23 SMH120R42U12.1W23
SMH120R46E6.7W23 SMH120R46U8W23 SMH120R46U12.1W23
SMH120R54E6.7W23 SMH120R54U8W23 SMH120R54U12.1W23
SMH210R40E6.7W23 SMH210R40U8W23 SMH210R40U12.1W23
SMH210R46E6.7W23 SMH210R46U8W23 SMH210R46U12.1W23
SMH210R54E6.7W23 SMH210R54U8W23 SMH210R54U12.1W23
SMH280R43E6.7W23 SMH280R43U8W23 SMH280R43U12.1W23
SMH280R46E6.7W23 SMH280R46U8W23 SMH280R46U12.1W23
SMH280R54E6.7W23 SMH280R54U8W23 SMH280R54U12.1W23
SMH440R40E6.7W23 SMH440R40U8W23 SMH440R40U12.1W23
SMH440R42E6.7W23 SMH440R42U8W23 SMH440R42U12.1W23
SMH440R46E6.7W23 SMH440R46U8W23 SMH440R46U12.1W23
SMH440R54E6.7W23 SMH440R54U8W23 SMH440R54U12.1W23
SMH660R40E6.7W23 SMH660R40U8W23 SMH660R40U12.1W23
SMH660R44E6.7W23 SMH660R44U8W23 SMH660R44U12.1W23
SMH660R46E6.7W23 SMH660R46U8W23 SMH660R46U12.1W23
SMH660R51E6.7W23 SMH660R51U8W23 SMH660R51U12.1W23
SMH660R54E6.7W23 SMH660R54U8W23 SMH660R54U12.1W23
材质W21锡青铜衬套系列
SMH40R38E6.7W21 SMH40R38U8W21 SMH40R38U12.1W21
SMH40R46E6.7W21 SMH40R46U8W21 SMH40R46U12.1W21
SMH40R54E6.7W21 SMH40R54U8W21 SMH40R54U12.1W21
SMH80R36E6.7W21 SMH80R36U8W21 SMH80R36U12.1W21
SMH80R42E6.7W21 SMH80R42U8W21 SMH80R42U12.1W21
SMH80R46E6.7W21 SMH80R46U8W21 SMH80R46U12.1W21
SMH80R54E6.7W21 SMH80R54U8W21 SMH80R54U12.1W21
SMH120R42E6.7W21 SMH120R42U8W21 SMH120R42U12.1W21
SMH120R46E6.7W21 SMH120R46U8W21 SMH120R46U12.1W21
SMH120R54E6.7W21 SMH120R54U8W21 SMH120R54U12.1W21
SMH210R40E6.7W21 SMH210R40U8W21 SMH210R40U12.1W21
SMH210R46E6.7W21 SMH210R46U8W21 SMH210R46U12.1W21
SMH210R54E6.7W21 SMH210R54U8W21 SMH210R54U12.1W21
SMH280R43E6.7W21 SMH280R43U8W21 SMH280R43U12.1W21
SMH280R46E6.7W21 SMH280R46U8W21 SMH280R46U12.1W21
SMH280R54E6.7W21 SMH280R54U8W21 SMH280R54U12.1W21
SMH440R40E6.7W21 SMH440R40U8W21 SMH440R40U12.1W21
SMH440R42E6.7W21 SMH440R42U8W21 SMH440R42U12.1W21
SMH440R46E6.7W21 SMH440R46U8W21 SMH440R46U12.1W21
SMH440R54E6.7W21 SMH440R54U8W21 SMH440R54U12.1W21
SMH660R40E6.7W21 SMH660R40U8W21 SMH660R40U12.1W21
SMH660R44E6.7W21 SMH660R44U8W21 SMH660R44U12.1W21
SMH660R46E6.7W21 SMH660R46U8W21 SMH660R46U12.1W21
SMH660R51E6.7W21 SMH660R51U8W21 SMH660R51U12.1W21
SMH660R54E6.7W21 SMH660R54U8W21 SMH660R54U12.1W21