Type D/ MD/ DF/ DY multistage horizontal centrifugal pump consists of stator, rotator, bearing and shaft seal:

1) Stator: main parts is suction casing, stage casing, discharge casing and diffusor, they are screw up by poles to become a working house. The suction direction of D pump is horizontal, its discharge direction is upword; the discharge direction of MD/DF/DY pumps are upward, the suction direction is horizontal, they can be made upword according to user requirement.

2) Rotor: it is consist of shaft, impeller, balance disc, and shafe sleeve etc. Shaft supplied power to impeller. The axial force is balanced by disc. The shaft sleeve is mounted on shaft to protect shaft.

3) Shaft seal: it is usually adopted soft packing seal, consist of sealing house on suction casing, packing, blocking water ring, the seal house have some pressure water to cool. Lubricate and seal pump. Type D pump pressure water come from pump itself; type MD/DF/DY pump pressure water is come from pump itself or outer water, type MD/DF/DY pump usually adopt mechanical seal. 

4) Drive: The pump is driver directly by motor through coupling.

Horizontal multi-stage centrifugal pump the material parameter table.

Horizontal multi-stage centrifugal pump

Capacity Q:6.3~600m3/h

Head H:22.8~650m

About the description of the horizontal centrifugal pump

D(MD,DF,DY) 85-67×3

D —Multi-stage horizontal centrifugal pump

MD —Multi-stage wearable centrifugal pump

DF —Multi-stage anti-corrosive centrifugal pump

DY —Multi-stage centrifugal oil pump

85 — The capacity is 85m3/h at design point

67 — The single stage head is 67m at design point

3 —The stage number is 3 stage

https://www.china.cn/product-detail/WQP-stainless-steel-water-pump-centrifugal_60179231442.html?spm=a2747.manage.list.7.kVQYLR