What are the selection parameters for Dalian Chemical Pump?

In the chemical production process, pumps are one of the key equipment for transporting fluid media. Due to the special nature of chemical media, such as corrosiveness, toxicity, flammability, and explosiveness, the selection of Dalian chemical pumps is particularly important. Reasonable selection not only ensures the normal operation of equipment, but also improves production efficiency, reduces energy consumption, and lowers maintenance costs. The following are the main parameters that need to be considered when selecting chemical pumps:

1. Physical and chemical properties of the medium

Medium type: Clearly identify whether the medium being transported is liquid, slurry, or gas, as well as its specific composition (such as water, acid, alkali, oil, etc.).

Density: The density of the medium directly affects the head and power calculation of the pump.

Viscosity: For high viscosity media, it is necessary to choose a suitable pump type (such as screw pump, gear pump) to avoid efficiency reduction or blockage.

Corrosivity: Choose corrosion-resistant materials (such as stainless steel, titanium alloy, plastic, etc.) based on the corrosiveness of the medium.

Toxicity: When transporting toxic media, it is necessary to choose a pump type with good sealing performance to avoid leakage.

Temperature: The temperature range of the medium affects the material selection and cooling method of the pump.

Particle content: If the medium contains solid particles, a pump type with good wear resistance (such as slurry pump) should be selected.

2. Traffic

Flow rate refers to the volume of medium transported by a pump per unit time, usually expressed in cubic meters per hour (m ³/h) or liters per minute (L/min).

When selecting, the maximum, minimum, and rated flow rates should be determined according to the process requirements to ensure that the flow range of the pump can meet production needs.

Excessive traffic may lead to increased energy consumption, while insufficient traffic may not meet production needs.

3. Lift

Head refers to the resistance that a pump can overcome (including height differences, pipeline friction, etc.), usually expressed in meters (m).

When selecting, the total head of the system needs to be calculated, including static head (height difference) and dynamic head (pipeline resistance).

Excessive head may lead to a decrease in pump efficiency, while insufficient head may result in the inability to deliver the medium to the target location.

4. Types of pumps

Centrifugal pump: suitable for low viscosity, particle free media, with high flow rate and medium head.

Screw pump: suitable for high viscosity, particle containing media, with stable flow and high head.

Diaphragm pump: suitable for corrosive and toxic media, with good sealing performance.

Gear pump: suitable for high viscosity media, with stable flow but low head.

Magnetic pump: suitable for flammable, explosive, and toxic media, with a leak free design.

5. Material selection

Select appropriate pump body materials based on the corrosiveness, temperature, and other characteristics of the medium:

Stainless steel: Good corrosion resistance, suitable for general chemical media.

Plastic (such as PP, PVDF): Strong corrosion resistance, suitable for strong acid and alkali media.

Titanium alloy: suitable for highly corrosive media, with high cost.

Cast iron: suitable for non corrosive media, low cost.

6. Sealing method

Mechanical seal: Suitable for most chemical media, with good sealing performance but high cost.

Packing seal: suitable for non corrosive media, low cost but requires regular maintenance.

Magnetic seal: suitable for flammable, explosive, and toxic media, with a leak free design.

7. Working environment

Temperature: The ambient temperature affects the cooling method and material selection of the pump.

Pressure: The working pressure of the system needs to match the pressure bearing capacity of the pump.

Installation location: The installation location of the pump (such as indoor, outdoor, underwater, etc.) affects its protection level and structural design.

8. Power and efficiency

Calculate the power demand of the pump based on flow rate, head, and medium density to ensure that the motor can provide sufficient power.

Choosing high-efficiency pump types can reduce energy consumption and save operating costs.

9. Operation mode

Continuous operation: Suitable for situations that require long-term stable operation, it is necessary to choose a pump type with good durability.

Intermittent operation: Suitable for short or periodic operation scenarios, it is necessary to choose a pump type with good starting performance.

10. Maintenance and Cost

Convenience of maintenance: Choosing a pump type with a simple structure and easy maintenance can reduce maintenance costs.

Initial cost: Choose the appropriate pump type based on the budget, but consider both operating and maintenance costs comprehensively.

Spare parts supply: Select common pump types in the market to ensure sufficient supply of spare parts.

11. Special requirements

Explosion proof performance: When transporting flammable and explosive media, explosion-proof pumps should be selected.

Hygiene requirements: In the food and pharmaceutical industries, it is necessary to choose pump types that meet hygiene standards.

Noise control: In noise sensitive areas, low-noise pump types should be selected.

12. Brand and after-sales service

Choosing pumps from well-known brands ensures better quality and performance.

Understand the after-sales service capabilities of suppliers to ensure timely resolution of equipment issues.

The selection of chemical pumps is a complex process that requires comprehensive consideration of multiple factors such as the physical and chemical properties of the medium, flow rate, head, pump type, material, sealing method, working environment, power, operating mode, and maintenance cost. Reasonable selection not only ensures the normal operation of equipment, but also improves production efficiency, reduces energy consumption, and lowers maintenance costs. In the actual selection process, it is recommended to communicate fully with professional technicians or suppliers to ensure the selection of a more suitable pump type.