DF(P) Self-balancing Corrosive Resistance Multistage Pump

Main Design Point

High-efficiency self-balancing multistage centrifugal pump, it’s design is based on the actual safety, economy, failure-free operation ability and low repair and maintenance cost of the whole operation of the pump set. The main design point introduction as below:

• Advanced assembly modularized design, mainly used the parts that have experienced the long term test, high changed between the parts.
• High strength, high quality material and many kinds of the suction and discharge flange, mainly improved the adapter load, high strength and high quality pump cover has a compact structure, the operation life is five times than the common pump. The flow parts of the impeller and the diffuser adopt the precision casting. Smooth efficiency is 2% higher than the common casting parts.
• Fast assemble and disassemble design, it is allowed to change the sealing, the shaft parts without disassemble the inlet and outlet pipe, so this greatly reduced the maintaining time.
• With high efficiency, high reliability and low cost combination, and the perfect match of the impeller and the guide vane, and reasonable axial clearance and wider throttle design, which can maintain it’s high stability and operational efficiency after a long running time.
• Excellent NPSH, we adopt excellent hydraulic model and special double suction impeller structure, so the user do not need match the booster pump or increase the height of the inlet chest.
• The safely sealing design, according to the difference of the pressure and the structure, the pump casing adopt the metal face-to-the metal face hard sealing or the O ring sealing.
• It can change the shaft and sealing without disassemble the inlet and outlet pipes.
• The pump adopts the symmetrical setting, totally can eliminate the axils force, the remnants axils force is bored by a pair of back-to-back the angular contact ball bearing.
• As without the balance disk, so there is no rush between the disks and no balance backflow lose.
• As no balance device, totally solved the problems caused by the lose efficiency of the balance disk and the balance base, greatly extend the operation time of the pump.
• Special structure strength design, the maximum single stage head of the pump is 1.5Mpa(150m), the allowed inlet pressure 15Mpa(total head is 1500), also make core bag that combine with the shaft and the rotor not affected by the changeable temperature. It has a good thermal shock resistance.
• Adopt the cartridge seals so it do not have the axils endplay, then it overcome the bad contact lead to the invalid of the old type multistage pump, then make sure there is no leakage during operation.