CRDGIndustrial Boiler Feed Pump

GeneralDescription

CRDGhorizontal Multi-stage boiler feed pump can delivery clear waterwithout solid particles or other liquid which the physical andchemical feature is similar with clear water. It is suitable forboiler feed water or deed water for high pressure boiler. Thetemperature range of the liquid is from -20??? to150???, and theinlet pressure is not allowed more than 0.6Mpa.

Performance range  
Capacity : 3.75~ 288m3/h
Head :  50 ~ 1540m
 
Instruction of pump type
For Example  CRDG25-80x10

CR: CompanyCode, means produced by CREDO PUMP

DG — Single-suction, multi-stage, boiler feed pump.
25 — Pump capacity 25 m3/h.
80 —Single-stage head of pump 80m .
10 — pump stage numberis 10.

 
Structure
CRDG series pump is single casing segmental multi-stage centrifugalpump, the main parts is stator, rotor, bearing andshaft.

Stator part:it mainly consists of suction stage, mid-stage, discharge stage anddiffuser; they are strained through a lever and form a workingchamber. The inlet and the outlet are vertical upward. The combinedsurface between each stage is sealed through metal surface and alsowith sealing o-ring as auxiliary seal.

Rotor part:it mainly consists of shaft, impeller, and balance drum and shaftsleeve. Shaft transfers power to impeller and make it work. Theaxial force is balanced by balance disc and there is rechargeableshaft sleeve to protect shaft.

Bearing part:It mainly consists of bearing body, shaft cover and slidingbearing. There are two single centripetal ball bearings in bearingbody to prevent balance disk from abrasion. The sliding bearing islubricated by dilute oil, there is cooling chamber in bearing bodyand the bearing can be cooled with exterior water.

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

 Drive:Pump is directly driven by motor through flexible coupling. Viewfrom motor end, the rotating direction of pump isclockwise.

Material of main parts   
The medium-contacting parts are made of cast iron .