As an important gas conveying equipment in the industrial field, the performance parameters of multi-stage blowers directly affect the operational efficiency of the system. This article systematically introduces the six core parameters that need to be paid attention to when choosing a multi-stage blower, helping users make scientific choices.

1、 Traffic parameters (Q)

Flow rate is the primary indicator for selection, referring to the volume of gas transported by the blower per unit time, commonly expressed in m 3/min or Nm 3/h. Please note:

Distinguish between operating condition flow and standard condition flow

Consider the maximum/minimum traffic requirements of the system

Reserve 10-15% margin to cope with fluctuations in operating conditions

2、 Pressure parameter (P)

Including key data such as import and export pressure, pressure boosting capacity, etc.:

Rated working pressure range

maximum allowable working pressure

The boosting capacity needs to match the resistance of the pipeline network

Pressure distribution design in multi-stage series connection

3、 Power characteristics

Shaft power: actual power consumption (kW)

Motor power: transmission efficiency margin needs to be considered

Specific power: an important indicator for evaluating energy efficiency

Power variation curve during frequency conversion regulation

4、 Medium characteristics

Gas properties directly affect selection:

Gas composition (corrosive/explosive)

Dust content and particle size

Temperature range (-20 ℃ to 150 ℃)

Humidity and dew point requirements

5、 Structural parameters

Level selection (common configurations for levels 2-8)

Impeller material (cast iron/stainless steel/titanium alloy)

Sealing form (labyrinth seal/mechanical seal)

Cooling method (air-cooled/water-cooled)

6、 Performance curve

The complete selection requires analysis of:

Flow pressure curve

Flow power curve

Efficiency Curve

Surge boundary line

Selection suggestion:

Prioritize selecting models that operate in efficient intervals

Consider the demand for capacity expansion in the next 3-5 years

Compare the full cycle performance of different brands

Pay attention to the evaluation of after-sales maintenance costs

Only by correctly understanding these parameter relationships and combining them with specific operating requirements can the most suitable multi-stage blower equipment be selected. It is recommended to entrust professional technicians to perform system calculations, and if necessary, request suppliers to provide performance testing reports.