Modern GDL multi-stage pipeline centrifugal pump is a new generation product designed and made by this co.on the basis of the excellent pump types both domestic and overseas and combining the requirements of use and the related fire-fignting standards and following the standard of JB/TQ6435-92. This pump uses a vertical,sectional and stainless steel casing structure to have both inlet and outlet on a same level,of a same aperture and capable of being mounted in a pipeline just as avalve and collects the merits of the high pressure of a multi-stage pump,a less land area of a vertical ump and convenient installation of a pipeline pump and ,due to the excellent hydraulic model it adopts ,also features a high efficiency,energy-saving,stable running etc?..,in addition,because of the wearable mechanical seal it uses as the shaft seal,it has to leak and a long duration of use. To provide a better satisfaction to the requirements of users ,this co. also develops model GDLS the outlet of which is located on the upper part and both inlet and outlet can be mounted in different opposite ,leaving an extremely convenient use.