Boiler Feed Pump

Type DG pump is used for feeding water of sub-high pressure boiler. It is provided for delivering clear water without solid particles or other liquid which is physically and chemically similar to clear water. It is suitable for feeding water in power station. The temperature of the liquid can not be over 160℃.

DG25-80×10

DG—Multi-stage boiler feed pump

25—The capacity is 25m³/h at design point

80—The single stage head is 80m at design point

10—The stage number is 10 stage

Capacity: 25～150m³/h

Head;   476～985m

 Type DG pump is single casing segmental multi-stage centrifugal pump; the main parts of it are stator, rotor, bearing and shaft seal.

 Stator parts: It mainly consists of suction stage, mid-stage, discharge stage and diffuser; they are strained through a lever and form a working chamber. The inlet and the outlet are vertical upward. The combined surface between each stage is sealed through metal surface and also with sealing o-ring as auxiliary seal.

Rotator parts: It mainly consists of shaft, impeller, balancing drum and shaft sleeve. Shaft transfers power to impeller and make it work. The axial force is balanced by balance disc (kettle) and there is exchangeable shaft sleeve in shaft to protect shaft.

Bearing parts: It mainly consists of bearing body, shaft cover and sliding bearing. There are two single centripetal ball bearings in bearing body to prevent balance disc (kettle) from abrasion. The sliding bearing is lubricated by dilute oil, there is cooling chamber in bearing body and the bearing can be cooled with exterior water.

Shaft seal parts: Shaft seal uses soft packing seal. It mainly consists of seal box, packing, packing ring and packing cover. The shaft is sealed, cooled and lubricated by exterior water from seal chamber. The mechanical seal can also be used as requirement and it need be cooled, lubricated and washed by exterior water.

Drive: Pump is directly driven by motor through flexible coupling. View from motor end, the rotating direction of pump is clockwise.