Application&Materials

Model	Applicable media	Texture of material
DPS	Pure water, below 80℃	Flow passage parts material: cast iron
DFPS	Oil, temperature below 80℃,Viscosity less than 120 cSt	Flow passage parts material: cast steel or cast stainless steel based on temperature and causticity of    the fluid
DYPS	Corrosive fluids, －20℃～105℃	Flow passage parts material: cast iron, cast steel or cast stainless steel based on temperature of     the fluid
MDPS	Fluids with solids ≤1.5%, dia. ≤0.5mm, temperature -20~80℃	Flow passage material: wear-resistance iron or ductile iron

 

          With the adoption of a dual-inlet design and symmetric impeller rotor components the parallel pump has two channels collected via the outlet section before discharge, realizing a parallel connection. The structure can balance the axial force of rotor components in the pump.   With compact structure, no leakage,  high efficiency, stable operation and strong applicability, it’s a new force in self-balancing horizontal multi-stage centrifugal pumps.
          With big design flow and high lift,  the parallel pump is a strong supplement of single-stage dual-suction horizontal centrifugal pumps and conventional self-balancing horizontal multi-stage centrifugal pumps. It’s widely applied to municipal water supply projects, water conservancy projects, petrochemical projects and other projects of big flow and high lift, and can totally replace multi-stage water supply of conventional single-stage dua suction horizontal centrifugal pumps, realizing first-level drainage, greatly reducing budget and equipment operation and maintenance cost.

 

New structure

With rotor components with symmetric impellers,the product offsets the axial thrust generated  during operation of forward and backward sets of impellers.In this way,the balancing disc    device with small clearance and high pressure drop, which is easily flushed,worn and fails is not needed to keep axial force balancing,breaking the traditional structure of multi-stage pump.

New technology

Unique throttling and pressure relieving device,odd-level balancing device,playing a supporting role.

High efficiency and energy conservation

Advanced hydraulic model and independently developed high-efficiency energy-saving products    are adopted; since the pump rotor doesn't have abrasion of the balancing disc or axial pulse,the impeller and the guide vane are always centered in the optimal way,unike ordinary multi-stage

pump whose efficiency drops remarkably with abrasion of the balancing disc and the forward moving ot the rotor component; there is no balancing water leakage,thus reducing the volume

loss.improving operation efficiency of the pump on the whole and reducing the axial power. 2%-3% higher than ordinary multi-stage pump in efficiency.

High reliability

Self-balancing axial force load reduces pump abrasion and system disturbance by the largest    extent. A very small portion of residual axial force is borne by the thrust bearing,so that the pump shaft is always tensioned uniformly,and the stress peak is much lower than the original   structure, thus improving rotor rigidity and critical rotating speed,and remarkably improving rotor operation stability and reliability.

High stability

With optimal combination of symmetrical impeller and guide vane,as well as reasonable fitting clearance and wide axial throttling design,the pump can maintain high stability and operation efficiency during long term operation.

High cavitation resistance

With optimal hydraulic model and structural design,special first-stage impeller dual-suction structure,precise casting and reliable wearing resistance,the pump has sound cavitation  resistance. The machine runs stably with low noise.A front pump is not needed and the water tank height doesn’t need to be raised.

Strong reliability of mechanical seal

When the pump is started or stopped, the rotor component doesn't have axial play.When it's in operation,the rotor component has no axial pulse. The problem of poor reliability of    mechanical seal which has troubled the multi-stage pump for long has been overcome.

Easy maintenance

With rapid assembly & disassembly design,the pump is allowed to change seal and bearing without dismantling the pump body and inlet/outlet pipelines.There are no wearing parts such as balancing disc in the pump,thus saving time for overhauling and inspection.

Low maintenance rate

Precise casting is adopted,thus reducing wearing components and times of maintenance and disassembly,extending service life,avoiding problems caused by too many times of disassembling, and lowering the maintenance cost.

Strong    applicability

With advanced modular design,partial components and parts that have been tested by repeated use and long-term operation have high level of interchangeability.

Small-clearance balancing disc device is canceled,more suitable for tough media than multi- stage pumps of conventional structure.

                                                                                                              Performance Range

 

DPS 50HZ

DPS 60HZ