DL series vertical multistage centrifugal pump
Product Category: Multistage Pump
Caliber (import / export): φ40-φ250
Flow range: 4.2-504 (m3 / h)
Head range: 24-240 (m)
Details: (click on the title below)
立式多级离心泵为立式多级多节段式结构。 DL type vertical multi-stage centrifugal pump is a vertical multi-stage multi-segment structure. The screw clamps the water inlet section, the middle section and the water outlet section together. Each stage of the pump is equipped with an impeller and a guide vane. The axial force is solved by hydraulic balance method. The residual axial force is borne by the ball bearing and lubricated with grease. The shaft seal adopts soft packing or mechanical seal. The product is mainly used to suck diluted, clean, non-corrosive, non-explosive clear water and liquids without solid particles or fibers similar to water in physical and chemical properties.
Scope of application:
Widely used in high-rise buildings for fire protection, domestic water supply, air-conditioning unit circulation, cooling water delivery.
、水利模型：设计合理，性能范围广。 1. Hydraulic model: Reasonable design and wide range of performance.
、结构合理，运行可靠：取消了平衡鼓，其轴向力采用水力平衡，解决了平衡鼓易锈蚀、易咬死、易磨损的问题，保证了运行更加可靠。 2. Reasonable structure and reliable operation: The balance drum has been cancelled, and its axial force is hydraulically balanced, which solves the problems that the balance drum is susceptible to corrosion, seizure and wear, ensuring more reliable operation.
、更少的运行、维修费用：采用机械密封，耐磨损、不易泄漏、使用寿命长，故障率较低。 3. Fewer operating and maintenance costs: mechanical seals are used, which are resistant to wear, are not easy to leak, have a long service life, and have a low failure rate.
、运行平稳，噪音较低：采用低转速电机，使泵运行平稳，噪音较低。 4. Stable operation and low noise: Low-speed motor is used to make the pump run smoothly and the noise is low.
、立式结构，占地面积小。 5 , vertical structure, small footprint.
6. The inlet and outlet flanges can be on the same side or on both sides.
； Power: 1.5-450kw ;
； Speed: 1480r / min ;
φ 250 ； Caliber: φ 40- φ 250 ;
Temperature range: 0- +
。 Working pressure: ≤ 2.4Mpa .
Five, model meaning:
The pump does not suck the pressure gauge and vacuum gauge pointers
1. Insufficient water perfusion
2. Air leakage at the connection between the pipeline and the instrument
3.Suction is too high
1. Check if the foot valve is leaking.
2. Tighten the leak
3. Reduce water absorption height
Pump does not absorb water, vacuum gauge indicates high vacuum
1. Foot valve is not open or blocked
2. The suction pipe resistance is too large
3. Filter is clogged
1. Check the foot valve
2. Replace the water absorption
3.Clean the filter
Pressure gauge is under pressure but still does not produce water
1. Outlet pipe resistance is too large
2. Wrong direction of rotation
3. The outlet pipe valve is not open
4. Impeller blocked
1. Check or pinch the short water pipe
2. Check the motor.
3. Open the outlet valve
4. Remove dirt from the impeller
1. There is air inhalation
2. Because the water level is lowered.
3. Foreign bodies are blocked in the impeller
4.Severe wear of the rotor
1. Check for leaks and eliminate
2. Extend the suction pipe. Deepen the submergence depth
3.Remove and remove foreign matter
4. Replace seal is broken
Pump consumes too much power
1. The packing is pressed too tightly.
2. Excessive flow
3. There is friction between the rotating body and the shell
4. Pump bearing wear
5.Bent pump shaft
2.Close the small gate valve opening
4. Replace the bearing
5. Replace or correct
Increased pump vibration
1. The impeller is partially blocked
2. Impeller is broken
3. The flow is too small
4. The pump shaft is not concentric with the motor
6. Mixed with air. Cavitation occurs
1. Remove and remove foreign objects
3.Slightly tap the outlet valve
6. Change the suction position. Improve the suction pipe