“AT-2”系列仅装备***法兰。齿轮端盖的设计允许使用2-1/2英寸的美国标准管尺寸，和2英寸的法兰边。目前有三种不同类型：带螺纹的，碰焊，承插焊接。所有AT-2泵特别适合车载应用，或法兰连接是必要的。如果端口作为入口，通过同时提供液体到齿轮组合来减少内部障碍。有两种基本的结构包括”L”型和”R”型。”AT-2R”和”AT-2L”有相同端口，反方向进入，如下图所示。”H”和”Non-H”型之间更多的区别为：在相同速度时，带着字母”H”型号的有更高的输出功率。在***大速度时，这些泵的压差性至少为300PSID，液体粘度大约为500SSU。它们的设计为水平底座装备，能直接驱动马达，或使用齿轮减压器，驱动传动带，驱动链条。旁通阀和过滤器是被推荐的另外装备。***ith二氧化碳泵AT-2L“AT-2Series”comesequippedwith***ithdesigncompanionflangesonly.Thegearendcoverflangeisdesignedtoaccepta2-1/2inchAmericanStandardPipeSize,andthesideflanges,2-inch.Thereare***ailableinthreedifferentkinds:threaded,butt-weld,andsocketweld.AllAT-2pumpsareparticularlysuitableformobileapplicati***,orwhereflangedconnecti***arenecessary.Iftheendportisusedastheinlet,internal“drag”isreducedbyprovidingliquidtobothgearcombinati***simultaneously.Therearetwobasicconfigurati***involvingthe“L”andthe“R”types.”AT-2R”pumpsand“AT-2L”pumpsh***ethesameporting,butturninoppositedirecti***asshowninthedrawingbelow.Afurtherdistinctioncanbemadebetweenthe“H”and“Non-H”types:modelscarryingtheletter“H”inthemodelnumberh***ehigheroutputsatthesamedrivespeed.Thesepumpsarecapableofdifferentialpressuresofatleast300P.S.I.D.,withliquidsaround500S.S.U.viscosity,atmaximumspeed.Theyaredesignedforhorizontalbasemounting,andcanbedirect-motordriven,orusedwithgearreducers,beltdrives,orchainpassvalvesandstrainersarerecommendedadditionalequipment.TYPICALRATEDOUTPUTSAT-2R,AT-2L,,ATC-2RandATC-2L:12-1/2GPMat450RPM25GPMat900RPM50GPMat1800RPM(max.)AT-2RH,AT-2LH,ATC-2RH,andATC-2LH:12-1/2GPMat375RPM25GPMat750RPM50GPMat1500RPM(max.))