The following is aboutMultistage centrifugal pumpDetailed data and explanations of selection guide:

1.Multistage centrifugal pumpA basic overview of

Multistage centrifugal pumpIt is a pump that increases the head by cascading multiple impellers. It is suitable for occasions that require high head and stable flow.Multistage centrifugal pumpWidely used in water supply systems, boiler water supply, industrial processes,Firefightingsystems and other fields.

2.Selection guide detailed data

2.1 Determine demand parameters

1. Flow (Q)

   • definition: The amount of liquid delivered by the pump per unit time.
   • unit: Cubic meters per hour (m3/h) or liters per second (L/s).
   • Determining method: Determine the required flow rate based on system needs or process requirements.
   • Example: Assume that the required flow rate is 100 m3/h.

2. Lift(H)

   • definition: The pump can raise the height of the liquid.
   • unit: Meter (m).
   • Determining method: Determine the required head according to system requirements or process requirements, including static head and dynamic head.
   • Example: Assume that the required lift is 150 meters.

3. Power(P)

   • definition: The power of the pump motor.
   • unit: kilowatt (kW).
   • Calculation formula：( P = \frac{Q \times H}{102 \times \eta} )
     • (Q): flow rate (m3/h)
     • (H): Lift (m)
     • ( \eta ): efficiency of the pump (usually 0.6-0.8)
   • Example: Assuming the efficiency of the pump is 0.7, the power calculation is:
     [P = \frac{100 \times 150}{102 \times 0.7} \approx 20.98 \text{ kW}]
     
     

4. Media properties

   • temperature: The temperature range of the medium.
   • viscosity: The viscosity of the medium.
   • corrosive: The corrosiveness of the medium, choose the appropriate pump material.
   • Example: Assume that the medium is clean water at normal temperature and non-corrosive.

2.2 Select pump type

1. Horizontal multistage centrifugal pump

   • Features: Compact structure, easy to install, suitable for most occasions.
   • application: Water supply system, boiler water supply, industrial process, etc.
   • Example:chooseHorizontal multistage centrifugal pump.

2. Vertical multistage centrifugal pump

   • Features: Small footprint, suitable for situations with limited space.
   • application: High-rise building water supply, fire protection system, etc.
   • Example: If the installation space is limited, you can chooseVertical multistage centrifugal pump.

2.3 Select pump material

1. Pump body material

   • cast iron: Suitable for situations with general water quality.
   • Stainless steel: Suitable for corrosive media or occasions with high hygiene requirements.
   • bronze: Suitable for seawater or other highly corrosive media.
   • Example:choosecast iron pumpBody, suitable for general water quality.

2. Impeller material

   • cast iron: Suitable for situations with general water quality.
   • Stainless steel: Suitable for corrosive media or occasions with high hygiene requirements.
   • bronze: Suitable for seawater or other highly corrosive media.
   • Example: Choose cast iron impeller, suitable for general water quality.

2.4 Select brand and model

1. Brand selection

   • well-known brands: Choose well-known brands to ensure product quality and after-sales service.

2. Model selection

   • References: According to the required parameters andpumpType Select the appropriate model. Refer to the product manuals and technical information provided by the brand.
   • performance curve: Check the performance curve of the pump to ensure that the selected model can meet the flow and head requirements.

3.Application details

1. water supply system

   • use: Used for urban water supply, rural water supply, industrial water supply, etc.
   • flow: Usually 10-500 m3/h.
   • Lift: Usually 50-300 meters.
   • Example: Urban water supply system, flow rate 100 m3/h, head 150 meters.

2. boiler feed water

   • use: Used for feed water of boiler system.
   • flow: Usually 10-200 m3/h.
   • Lift: Usually 50-200 meters.
   • Example: Boiler water supply system, flow rate 50 m3/h, lift 100 meters.

3. industrial process

   • use: Used for liquid transportation in industrial production.
   • flow: Usually 10-500 m3/h.
   • Lift: Usually 50-300 meters.
   • Example: Industrial process system, flow rate 200 m3/h, head 120 meters.

4. fire protection system

   • use: For the water supply of fire protection systems.
   • flow: Usually 10-200 m3/h.
   • Lift: Usually 50-300 meters.
   • Example:FirefightingSystem, flow rate 150 m3/h, lift 200 meters.

4.Maintenance and service details

1. Regular inspection

   • Check content: The operating status of the pump, sealing device, bearings, pipes and valve sealing, etc.
   • Check frequency: It is recommended to conduct a daily inspection to ensure the normal operation of the pump.
   • Example: Check the operating status and tightness of the pump every day.

2. Regular maintenance

   • Maintain content:
     • Pump body and impeller: Clean the pump body and impeller, check the wear of the impeller, and replace it if necessary.
     • Seals: Check and replace seals to ensure sealing reliability.
     • Bearing: Lubricate the bearings, check the bearings for wear, and replace them if necessary.
     • control system: Calibrate the control system and check the firmness and safety of electrical connections.
   • Maintenance frequency: It is recommended to perform comprehensive maintenance every six months to ensure long-term stable operation of the pump.
   • Example: Carry out comprehensive maintenance every six months, including cleaning the pump body and impeller, checking seals and bearings, and calibrating the control system.

3. troubleshooting

   • Common faults: Pump does not start, insufficient pressure, unstable flow, control system failure, etc.
   • Solution: Troubleshoot according to the fault phenomenon, and contact professional technicians for repair if necessary.
   • Example: If the pump does not start, check the power supply, motor and control system to eliminate electrical faults.

Ensure you choose the right one with these detailed selection guides and dataMultistage centrifugal pump, thereby effectively meeting the needs of the system and ensuring that it can work stably and reliably in daily operations.