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Sewage pump selection guide

2024-08-02

Choose the right onesewage pumpIt is vital to ensure the effectiveness and reliability of your sewage system.

The following issewage pumpDetailed data and steps for selection:

1.Determine demand parameters

1.1 Flow (Q)

  • definition:sewage pumpThe amount of sewage transported per unit time.
  • unit: Cubic meters per hour (m3/h) or liters per second (L/s).
  • Determining method: Determined based on the design specifications and actual needs of the sewage system. Generally, the flow rate should meet the discharge demand at the most unfavorable point.
    • residential building: Usually 10-50 m3/h.
    • commercial building: Usually 30-150 m3/h.
    • industrial facilities: Usually 50-300 m3/h.

1.2 Lift (H)

  • definition:sewage pumpAble to raise the height of sewage.
  • unit: Meter (m).
  • Determining method: Calculated based on the height of the sewage system, the length of the pipe and the resistance loss. The head should include static head (building height) and dynamic head (pipeline resistance loss).
    • Quiet lift: The height of the sewage system.
    • moving lift: The length and resistance loss of the pipeline, usually 10%-20% of the static head.

1.3 Power (P)

  • definition:sewage pumpMotor power.
  • unit: kilowatt (kW).
  • Determining method: Calculate the power requirement of the pump based on the flow rate and head, and select the appropriate motor power.
    • Calculation formula:P = (Q × H) / (102 × η)
      • Q: Flow rate (m3/h)
      • H: Lift (m)
      • η: Pump efficiency (usually 0.6-0.8)

2.Select pump type

2.1Submersible sewage pump

  • Features: The pump and motor are integrated in design and can be completely immersed in sewage.
  • Applicable occasions: Suitable for underground pools, sewage wells and other occasions requiring diving work.

2.2Self-priming sewage pump

  • Features: It has a self-priming function and can automatically suck in sewage after startup.
  • Applicable occasions: Suitable for ground-mounted sewage systems, especially where quick start-up is required.

2.3Centrifugal sewage pump

  • Features: Simple structure, smooth operation and high efficiency.
  • Applicable occasions: Suitable for most sewage systems, especially those with high lift and large flow.

3.Select pump material

3.1 Pump body material

  • cast iron: Common material, suitable for most occasions.
  • Stainless steel: Strong corrosion resistance, suitable for corrosive media and occasions with high hygiene requirements.
  • bronze: Good corrosion resistance, suitable for seawater and other corrosive media.

3.2 Impeller material

  • cast iron: Common material, suitable for most occasions.
  • Stainless steel: Strong corrosion resistance, suitable for corrosive media and occasions with high hygiene requirements.
  • bronze: Good corrosion resistance, suitable for sea water and other corrosive media.

4.Select make and model

  • Brand selection: Choose well-known brands to ensure product quality and after-sales service.
  • Model selection:Select the appropriate model based on demand parameters and pump type. Refer to the product manuals and technical information provided by the brand.

5.Other considerations

5.1 Operational efficiency

  • definition: The energy conversion efficiency of the pump.
  • Select method: Choose a pump with high efficiency to reduce operating costs.

5.2 Noise and vibration

  • definition: Noise and vibration generated when the pump is running.
  • Select method: Choose a pump with low noise and vibration to ensure a comfortable operating environment.

5.3 Maintenance and care

  • definition: Pump maintenance and service needs.
  • Select method: Choose a pump that is easy to maintain and maintain to reduce maintenance costs.

6.Instance selection

Suppose you need to select for a high-rise residential buildingsewage pump, the specific requirement parameters are as follows:

  • flow:40 m3/h
  • Lift:30 meters
  • power: Calculated based on flow rate and head

6.1 Select pump type

  • Submersible sewage pump: Suitable for underground pools and sewage wells. The pump and motor are integrated and can be fully immersed in sewage.

6.2 Select pump material

  • Pump body material: Cast iron, suitable for most occasions.
  • Impeller material: Stainless steel, strong corrosion resistance.

6.3 Select brand and model

  • Brand selection: Choose well-known brands to ensure product quality and after-sales service.
  • Model selection: Select the appropriate model based on the demand parameters and the product manual provided by the brand.

6.4 Other considerations

  • Operational efficiency: Choose a pump with high efficiency to reduce operating costs.
  • Noise and vibration: Choose a pump with low noise and vibration to ensure a comfortable operating environment.
  • Maintenance and care: Choose a pump that is easy to maintain and maintain to reduce maintenance costs.

Ensure you choose the right one with these detailed selection guides and datasewage pump, thereby effectively meeting the needs of the sewage system and ensuring that it can discharge sewage stably and reliably in daily operation.