What are the basic parameters of multistage pumps in the petrochemical industry?

2025-08-08

In the petrochemical industry, multistage pumps play a crucial role, and their basic parameters are key indicators of pump performance. The following are the main basic parameters of multistage pumps.

I. Flow Rate (Q)

Flow rate is the volume or mass of liquid a pump delivers per unit of time, usually expressed in cubic meters per hour (m³/h) or liters per minute (L/min). In the petrochemical industry, precise flow rate control is crucial for the continuity of the production process.

II. Head (H)

Head is the energy a pump can provide when transporting liquid, expressed as the height or pressure of a liquid column. It determines the vertical height or pressure level to which the pump can overcome pipe resistance and transport liquid. Expressed in meters (m).

III. Speed (N)

Speed indicates the rotational speed of the pump impeller, in revolutions per minute (rpm). Speed affects the flow rate and head of the pump; a best speed range is usually set in the design of multistage pumps.

IV. Power (P)

Power is the energy consumed by the pump when transporting liquid. It is divided into rated power and actual power, in kilowatts (kW) or horsepower (hp). In petrochemical applications, energy-efficient pumps are key, so choosing the appropriate power is crucial for production efficiency and cost control.

V. Efficiency (η)

Efficiency is the ratio of the pump's output power to its input power, representing the pump's energy conversion efficiency. High-efficiency pumps can reduce energy loss when transporting liquid, improving the overall efficiency of the production process.

VI. Allowable Suction Lift (Hs)

This is an important parameter for measuring the pump's self-priming ability, representing the maximum vacuum that the pump can create on the suction side, in meters of water column (mWC). In the petrochemical industry, ensuring that the pump can stably suck in liquid under various operating conditions is crucial.

VII. Other Parameters

These also include the pump's diameter, impeller number, shaft seal type, etc. These parameters are selected and adjusted according to specific applications and process requirements.

In summary, these basic parameters together determine the performance of multistage pumps in the petrochemical industry. When selecting and using multistage pumps, these parameters must be fully considered to meet specific process requirements and production needs. Correct selection and use can ensure the continuity, stability, and efficiency of the production process.

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