Regarding the customer's vertical water pump selection requirements and the 50CDLF12-150 model recommended by technical personnel, the following analysis focuses on four aspects: requirement matching, technical feasibility, selection optimization suggestions, and follow-up action plans, to help the customer and sales personnel make a more accurate selection decision:

 

I. Requirement Matching Verification

 

1. 12m³/h flow rate, 240m head requirement (1 unit)

 

Recommended Model: 50CDLF12-150

Parameter Matching:

 

Flow Rate: 12m³/h (Perfect Match)

 

Head: 240m (Perfect Match, 150-stage impeller design)

 

Power: 18.5kW (Suitable for high head, avoids overload)

 

Material: SS316L flow parts (corrosion resistant, suitable for clean water or weakly corrosive water)

 

Sealing: Mechanical seal (reduces leakage risk, low maintenance cost)

 

Conclusion: This model perfectly covers the customer's core requirements and can be directly selected.

 

2. 12m³/h flow rate, 50m head requirement (2 units)

 

Problem: The head of the 50CDLF12-150 pump is significantly higher than the requirement (240m vs 50m). Direct use would require valve adjustment or frequency converter control, which would lead to decreased efficiency (e.g., valve throttling losses) or increased energy consumption (frequency converter cost and efficiency losses).

 

The recommended model is not directly matched to the 50m head, possibly because the supplier lacks a lower head model in the same series.

 

Optimization suggestions:

 

Solution 1: Select a model specifically designed for a 50m head (e.g., 50CDLF4-30; assuming it exists, head 30m × number of impeller stages = 50m, flow rate 4m³/h × 3 units in parallel = 12m³/h).

 

Solution 2: If the customer accepts the efficiency loss, use the 50CDLF12-150 to reduce the head to 50m via frequency converter control. The motor's operational stability and energy consumption at low frequencies need to be verified.

 

Option 3: Consult the supplier about the availability of a customized impeller stage (e.g., reducing the number of stages to 20, head ≈ 80m, still higher than the requirement but closer).

 

3. 4m³/h flow rate, 50m head requirement (1 unit)

 

Problem: The 50CDLF12-150's flow rate is significantly higher than the requirement (12m³/h vs 4m³/h). If the flow rate is reduced through frequency converter control, the motor's efficiency and heat generation under low load need to be confirmed.

 

The recommended model does not directly match the small flow rate requirement, possibly because the supplier lacks a smaller flow rate model.

 

Optimization suggestions:

 

Option 1: Select a model specifically designed for 4m³/h, 50m head (e.g., 50CDLF2-50, assuming it exists, 2 impeller stages × 25m/stage = 50m).

 

Option 2: Use a 50CDLF12-150 frequency converter to control the flow rate to 4m³/h. The supplier needs to provide performance curves to verify efficiency and power.

 

II. Technical Feasibility Analysis

 

Material Compatibility: SS316L flow-through components: Suitable for non-corrosive media such as clean water and softened water. If the water contains chloride ions (e.g., seawater) or acidic substances, the material's corrosion resistance must be confirmed.

 

Cast Iron Flanges: Must ensure compatibility with the pipe material to avoid electrochemical corrosion (e.g., stainless steel pipes with cast iron flanges require insulating gaskets).

 

Sealing Performance: Mechanical Seal: Suitable for clean water media. If the media contains solid particles or fibers, it must be replaced with a wear-resistant mechanical seal or packing seal.

 

Electrical Parameters: AC380V 60Hz 3PH: The customer's power supply system and motor parameters must be confirmed to match (e.g., in some areas of China, the frequency is 50Hz, requiring adjustment of the motor poles or frequency converter control).

 

IP55 Protection Rating: Suitable for indoor or general industrial environments. For humid or dusty environments, it needs to be upgraded to IP65.

 

Efficiency and Energy Consumption: High-lift pumps (240m) may experience a 30%-50% efficiency decrease when operating at low-lift (50m) conditions. Actual energy consumption needs to be assessed using performance curves.

 

III. Selection Optimization Recommendations: Matching Model to Requirements:

240m Head Pump: Directly select 50CDLF12-150.

 

50m Head Pump:

12m³/h Requirement: Recommend parallel operation of 3 units of 50CDLF4-30 (if available) or a customized 20-stage impeller model.

 

4m³/h Requirement: Recommend 50CDLF2-50 (if available) or a frequency converter-controlled 50CDLF4-30.

 

Unified Series Selection: If the supplier can provide different impeller stage models within the same series (e.g., 50CDLF), spare parts management and maintenance costs can be simplified.

 

Redundancy Design: If the customer's future needs may expand (e.g., flow rate increases to 15m³/h), a 10%-20% flow margin can be reserved.

 

For more information on specific selection and pricing of water pumps, industrial pumps, and chemical pumps, please contact Winny at CIXIFM:

 

Email: sales01@cxflowmeter.com

WhatsApp: 008618049841995