Centrifugal Pump Selection for Clean Water
Based on the requirements, the 100CDL(F)85-30 centrifugal pump basically meets the technical parameters and functions. However, it is crucial to verify the flow rate, head, motor power
matching, and electrical control compatibility. The following is a detailed analysis:
I. Core Parameters of the 100CDL(F)85-30 Model
Flow Rate and Head
The "85" in the model number usually represents the flow rate (m³/h), which translates to:
85 m³/h ÷ 3600 s ≈ 23.6 L/s
This is significantly higher than the required flow rate of 3 L/s. It is necessary to confirm whether the flow rate can be reduced through frequency conversion speed regulation, or to select a
smaller model (such as CDL20-12).
The "30" in the head may represent the number of stages or the single-stage head. It is necessary to confirm whether the total head meets the 45m requirement by referring to the specific
product manual. If the total head is insufficient, a higher head model (such as CDL85-40) should be selected. Motor and Power Supply: Clearly supports 60Hz/230V power supply, consistent
with requirements.
It is necessary to verify whether the motor power matches the actual operating conditions (e.g., power requirement at a flow rate of 3 L/s) to avoid energy waste due to over-powered motors.
Protection Rating and Insulation: IP55 protection rating and Class F insulation meet standard requirements, suitable for continuous operation.
II. Key Points Requiring Supplementary Confirmation: Flow Rate and Head Matching: If the total head of the 100CDL(F)85-30 is ≥45m and the flow rate can be adjusted to 3 L/s via frequency
converter, the technology is feasible; otherwise, a different model is required.
Recommendation: Request the supplier to provide a performance curve for this model at 60Hz to confirm whether the operating point (3 L/s, 45m) is within the high-efficiency zone.
Electrical Start/Stop Control Panel: The control panel (e.g., contactor and thermal relay specifications) needs to be selected according to the actual power and current of the motor. Example:
If the motor power is 5.5kW and the current is approximately 21A, a CJX2-3210 contactor and an NR2-25 thermal relay should be selected.
Repair Kit and Foot Valve: Confirm that the mechanical seal and bearing models in the repair kit match the pump shaft diameter (e.g., a 40mm shaft diameter corresponds to a specific mechanical seal model).
The foot valve diameter must match the pump inlet diameter (e.g., DN80 or DN100).
III. Recommended Action Plan: Confirm with Supplier Technical Support: Provide the required parameters (3 L/s, 45m, 230V/60Hz) and request the supplier to recommend the most suitable
model (which may not be 100CDL(F)85-30).
Request the complete technical documentation for the recommended model, including performance curves, dimensional diagrams, and motor data.
Customized Electrical Control Panel: Based on the final determined motor power, request the supplier to provide an IP55 protection rating, direct-start control panel (including circuit breaker,
contactor, start/stop buttons, and indicator lights). Acceptance Checklist
Pump body (including motor)
Electrical control panel
Repair kit (mechanical seal + bearings)
Foot valve (same diameter as suction inlet)
Operator manual, performance curves, certificate of conformity.
IV. Alternative Model Reference
If 100CDL(F)85-30 is incompatible, consider the following models (parameters need further verification):
CDL20-12: Flow rate 12 m³/h (3.3 L/s), head 24 m (potentially higher at 60Hz).
CDL42-20: Flow rate 42 m³/h (11.7 L/s), head 60 m (requires frequency converter to reduce flow).
ISW80-160: Horizontal inline pump, wider flow range, but 60Hz compatibility needs confirmation.
If you have any questions about industrial pumps,
water pumps, or booster pumps, please feel free to contact Winny at CIXIFM:
WhatsApp: 008618049841995
