OEM Horizontal Multistage Boiler Feed Pump for Power Plant

Performance Curve & Parameters Table:

Nomenclature:

DG46-50x10

DG means multi-stage hot water centrifugal pump

46 means the design point of capacity of the pump is 46 m3/h,equivalent as 766.8L/Min.

50 means the design point of single-stage head is 50m

10 means the number of stage is 10 and the number of impeller is 10.

Structure of DG pump:

The series of DG pump inlet and outlet are all vertical upward. The casings of the pump are suction casing, stage casing(s), discharge casing, which bolted by tie bolts. There are two bearing housings, one packing box and other pump stator parts connected with suction casing and discharge casing by bolts.

The rotor part is mainly composed of shaft and impeller(s), shaft sleeve, balance disk and other parts. The numbers of the pump stage is the numbers of impeller which is the numbers of stage casings plus one because there is one impeller installed in the discharge casing. The shaft parts use the flat key and the shaft nut fastening to make it integrated with the shaft. In operation, the rotor will move in the axial direction of the pump casing so you cannot use radial ball bearing. The entire rotor is supported by either end rolling bearing or sliding bearing. The rolling bearings are lubricated with grease while the sliding bearings are lubricated with thin oil and the oil ring for self-lubricated and the circulating water for cooling. The axial force is balanced by the balancing disk, which is generally made of welded hard surfacing alloy, alloy steel or QT600Mn2 alloy. The balancing disk belongs to the vulnerable parts, and should be replaced in time.

During the installation of the suction casing, stage casing and discharge casing, their sealing contact surfaces must be sealed by molybdenum disulfide grease. Between rotor part and stator part is sealed with seal ring, diffuser sleeve etc. Please replace the seal ring and the diffuser sleeve when the abrasion had infOEM Horizontal Multistage Boiler Feed Pump for Power Plantce on the performance of the pump work.

The seal of shaft has two methods: mechanical seal and packing seal. When the pump adopts packing seal, the placement of the packing ring should be correct, the tightness of the packing must be appropriate, and the liquid can be exuded by drop by drop. By mechanical seal, there is no liquid exuded. All kinds of sealing elements are in the sealed box in which must pass into certain pressure water for water seal, water cooling or water lubrication. The shaft seal is fitted with a replaceable shaft sleeve to protect the shaft of the pump.

The main parts of the pump are usually made of high quality cast iron, or cast steel or stainless steel.

The series pump is driven directly by the prime mover through the elastic coupling, and the pump is rotated clockwise from the prime mover direction.

Production process:

Casting + As-cast + CNC processing + Parts test (Vision inspection + Dimensional measurement + Impeller static equilibrium test) + Casings installation and pressure test + Rotor installation and dynamic balance test + Pump installation + mechanical seal test + Deflection tester for the coupling assembly + Test bed testing + Painting + Packing + Shipment

As a professional manufacturer of multi-stage centrifugal pumps, we can produce different types of pump according to the application. We have D,DF,DY,MD,DG series of traditional multi-stage pump; D(P), DF(P), DY(P), MD(P) DG(P)series of self balancing multi-stage pump.

Usually D/D(P) types of multi-stage pump used for transmission of water free of solid particles and temperature below 80℃, or similar physical and chemical liquid. Suitable for mining, mill and city water supply and drainage.

DF/DF (P) types of multi-stage pump are used for transmission of corrosive liquid with temperature range of -20℃ ~ 105℃ and non-solid particles. We will produce according to the gravity, density, working temperature and the suction pressure of the fluid.

DY/DY (P) types of multi-stage pump used for transmission of non-solid oily liquid and petroleum product with temperature range of -20℃ ~ 105℃ and viscosity less than 120cst.

MD/MD (P) types of multi-stage pump used for transmission of neutral liquid from mining well or other similar liquid. The density and size of the particles of the sewage shall be less than 1.5% and 0.5mm respectively. The temperature range of the sewage shall be -20℃ ~ 80℃.

DG/DG (P) types of multi-stage pump used for low and medium pressure hot water transmission, also named as boiler feed pump. Temperature ranges from -20℃ ~ 150℃.

All the max suction pressure shall be 0.6Mpa.

Q1. What is your product range?

We can supply boiler water pump, Multistage centrifugal pump, clean water pump, sewage pump, chemical pump, oil pump, self priming pump, centrifugal submersible pump, single stage pump, industry pump etc.

Q2. Are you a manufacturer?

Yes, we are a professional manufacturer of horizontal multistage pumps over 20 years.

Q3. What information should I let you know if I want to get a quotation?

Please let us know pump flow capacity, pump head, medium, medium temperature, pump material, quantity, we will recommend relevant product.

Q4. Can you supply motor together?

Yes. We have cooperated factory. And most of the domestic customers require full set. But for foreign customers you can buy similar motor to avoid high custom duty if any.

Q5. What about your quality standard?

Under the ISO9001:2008 and China government standards of multistage centrifugal water pump.

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