DGP type self-balancing multi-stage boiler feed pump has no balancing device, I .e. no disc friction loss of balancing disc and no back-flow loss of balancing water, so the pump efficiency is 5 ~ 14% higher than that of multi-stage pumps of the same category, and the shaft power of the pump is reduced without friction of balancing disc, thus achieving an energy-saving effect, so the power consumption of the pump during operation is about 3% higher than that of multi-stage pumps of the same category. At the same time, it completely solves various faults such as the wear of the balance disc and the balance ring or the rotor seizure caused by the failure of the balance device. Its design extends the service life of the pump. The trouble-free running time is more than 3 times that of ordinary pumps, and the maintenance cost of users is greatly reduced, thereby reducing the life cycle cost of the pump. Years of operation has proved that the performance of the product has reached the advanced level of similar products in the world.

Fluid:20~160℃ Pure water

Medium and Low-pressure pump

● DN: 40-200mm

● FLOW: 3.75~335 m/h

● Head: 92~760m

● Motor Power: 7.5～500kw

Sub-High Pressure Pump

● DN:65-220mm

● Flow: 17.4-336m3/h

● Head: 92~760m

● Motor Power: 75-1250kw

DGP type self-balancing multi-stage boiler feed pump has reformed and innovated the traditional structural form, canceled the axial force balance mechanism of multi-stage centrifugal pump and canceled the balance plate device, which is the best replacement product of D and DG multi-stage centrifugal pump.

DGP type self-balancing multi-stage boiler feed pump has no balancing device, I .e. no disc friction loss of balancing disc and no back-flow loss of balancing water, so the pump efficiency is 5 ~ 14% higher than that of multi-stage pumps of the same category, and the shaft power of the pump is reduced without friction of balancing disc, thus achieving an energy-saving effect, so the power consumption of the pump during operation is about 3% higher than that of multi-stage pumps of the same category. At the same time, it completely solves various faults such as the wear of the balance disc and the balance ring or the rotor seizure caused by the failure of the balance device. Its design extends the service life of the pump. The trouble-free running time is more than 3 times that of ordinary pumps, and the maintenance cost of users is greatly reduced, thereby reducing the life cycle cost of the pump. Years of operation has proved that the performance of the product has reached the advanced level of similar products in the world.

Material

DGP type self-balancing multi-stage boiler high-pressure feed water pump is mainly used for conveying water containing no solid particles, the temperature is -20 ℃ ~ 150 ℃ or the physical and chemical properties are similar to water liquid, suitable for medium, low pressure and high pressure water supply. DGP type self-balancing multi-stage boiler feed water pump materials are HT200, OT600, 304, 304L, 316L, 317L, 904L, CD4, etc.

Self balancing multistage pumps can transport high-temperature clean water below 280 ℃, suitable for boiler feedwater, factory and urban feedwater. Suitable for conveying clean water with a temperature below 110 ° C or other non corrosive liquids with physical and chemical properties similar to water, widely used for boiler feedwater in industrial and mining enterprises and urban living water supply. The DG series pumps are particularly suitable for boiler feedwater and can also be widely used in industries such as pressure vessel water supply, hot water circulation, high-rise building water supply, farmland irrigation, fire boosting, hydraulic flushing, food, brewing, medicine, chemical industry, aquaculture, environmental protection, etc.

● Self Balancing structure

● High efficiency and energy saving

● With cooling system, the fluid water temperature can be 150°C~200°C~280°C

New structure

It has a rotor component with a symmetrical arrangement of impellers which can make the axial impulse of the positive and reverse groups of impellers counteract with each other, thus not needing a balancing disc device with a small gap, high voltage drop, easy erosion, easy abrasion and fault liability and making the breakthrough to the traditional structure of the multi-stage pump.

New technology

It has unique throttling, relief fitting and odd-level balancing devices,  it can also play the role of auxiliary support.

High efficiency and energy-saving

It uses an advanced hydraulic model which is a highly efficient energy-saving product independently researched & developed by our Because the pump rotor has no abrasion and axial pulsating movement of the balancing disc, the centring between the impeller and guide vane is always in the best condition, and the efficiency of it will not remarkably decrease along with abrasion of balancing disc and forward movement of rotor part as the general multi-stage pump. Furthermore, the water leakage has been eliminated to reduce the volume loss, the operating efficiency of the pump has been improved on the whole and shaft power has been reduced, the efficiency is 2%~3% higher than the general multi-stage pump on average.

High Reliability

The auto-balancing axial load reduces the abrasion of the pump and interference of the system to a minimum level. An extremely small part of the axial force is borne by thrust bearing. Thus the pump shaft is always under the tension state and the shaft has an even stress and strain state. In addition, the peak value stress has been remarkably reduced as compared with the original model, which increases the rigidity and critical rotation speed to improve the stability & reliability of the pump rotor remarkably.

High stability

The pump can still maintain a high level of stability and high operation efficiency after a long time of operation through the best matching between symmetric impellers and guide vanes as well as the proper matching gap and wider axial throttling design.

Good cavitation performance

Apart from an optimized hydraulic model and structural design and special severed head impeller double suction structure, it has also precise casting and reliable abrasion-resistant material, therefore, the pump has good anti-cavitation performance, the complete appliance operates stably with low noise and it is unnecessary for the user to additionally equip other fore pump or lift the height of the inlet water tank.

Even characteristics of thermal expansion (contraction) and good symmetry

The pump has even characteristics of thermal expansion(contraction) between the left and right side, up and down and it has good symmetry, therefore, it has successfully avoided the water leak problem among the stages due to thermal expansion(contraction).

Low maintenance rate

Adopting precision casting to reduce the wearing parts and maintenance dismounting times to prolong the product service life and save the overhaul and check time, in addition, a series of problems due to excessive dismounting has been reduced to maximum extent and maintenance cost has been reduced by using.

Strong applicability

It uses advanced combined modularization design, and the local components which have undergone a great quantity of use and a long period of application have a high level of interchangeability.

It has eliminated small gap-balancing disc devices, which can adapt to worse medium cases as compared to traditional structures.