CDL Series Light-Duty Vertical Multistage Stainless Steel Centrifugal Pump

Product Overview

The CDL Series Light-Duty Vertical Multistage Stainless Steel Centrifugal Pump is designed for clean-water transfer, pressure boosting, circulation, and water treatment applications requiring stable performance and a compact installation footprint.

Its vertical multistage structure combines multiple impellers to generate higher pressure while occupying less floor space than many conventional horizontal pump arrangements. Major wetted components are manufactured from stainless steel, helping maintain water cleanliness and providing reliable resistance to corrosion under suitable operating conditions.

With a flow range of 2–200 m³/h and a head range of 5–280 m, the CDL Series is suitable for high-rise building water supply, domestic water systems, industrial circulation, environmental water treatment, and other continuous-pressure applications.

Key Features

1. High-Efficiency Multistage Hydraulic Design
   Multiple impellers generate stable pressure efficiently, making the pump suitable for medium- and high-head water supply applications.
2. Compact Vertical Construction
   The vertical structure requires less installation space and is suitable for pump rooms, equipment skids, and sites with limited floor area.
3. Stainless Steel Main Components
   Major wetted parts are manufactured from stainless steel to support clean water transfer and provide a long service life under compatible operating conditions.
4. Stable and Reliable Operation
   A properly matched motor, shaft, impeller, and pump casing help maintain stable performance during continuous operation.
5. Clean and Professional Appearance
   The streamlined stainless steel pump body provides a modern appearance suitable for commercial buildings and integrated water supply equipment.
6. Wide Performance Coverage
   Multiple sizes and stages are available to meet different project requirements for flow, head, power, and connection diameter.

Applications

1. High-Rise Building Water Supply
   Pressure boosting for residential buildings, office towers, hotels, hospitals, and commercial complexes.
2. Domestic Water Supply Systems
   Clean-water transfer and pressure stabilization for residential and public water supply installations.
3. Industrial Circulation Systems
   Water circulation for manufacturing plants, processing equipment, cooling systems, and general industrial utilities.
4. HVAC and Cooling Water Systems
   Circulation and pressure boosting in heating, ventilation, air-conditioning, and cooling-water installations.
5. Environmental Water Treatment
   Process circulation, filtration supply, clean-water transfer, and pressure boosting in water treatment systems.
6. Integrated Booster Pump Systems
   Installation in variable-frequency water supply equipment, constant-pressure systems, and multi-pump booster packages.

Customer Benefits

1. Reduced Energy Consumption
   Efficient hydraulic performance helps reduce unnecessary power consumption when the pump is correctly selected for the duty point.
2. Lower Installation-Space Requirements
   The vertical structure helps save valuable floor space in equipment rooms and packaged systems.
3. Reliable Continuous Water Supply
   Stable operating performance supports applications requiring consistent flow and pressure.
4. Improved Water Cleanliness
   Stainless steel wetted components make the pump suitable for many clean-water and domestic water applications.
5. Reduced Maintenance Requirements
   A rational mechanical structure and durable materials help simplify routine servicing and extend maintenance intervals.
6. Flexible Project Matching
   A broad performance range allows the pump to be selected for different building, industrial, and water treatment projects.

Technical Specifications

Parameter	Specification
Product Series	CDL
Pump Type	Vertical multistage centrifugal pump
Flow Range	2–200 m³/h
Head Range	5–280 m
Motor Power	0.75–110 kW
Rated Speed	2900 r/min
Connection Diameter	DN25–DN150
Main Wetted Components	Stainless steel
Installation Type	Vertical
Suitable Media	Clean water and liquids compatible with pump materials
Typical Operation	Water transfer, circulation and pressure boosting

Actual performance, material grade, motor configuration, sealing arrangement, voltage, and connection standard should be confirmed according to the selected model and project conditions.

Selection Guidance

To select a suitable CDL pump, please provide the following operating information:

• Required flow rate in m³/h 
• Required total head in m 
• Liquid type and composition
• Liquid temperature
• Available inlet pressure
• Required outlet pressure
• Power supply voltage and frequency
• Installation environment
• Pipe connection diameter and standard
• Required control method, such as direct start or variable-frequency control

The selected operating point should be located within the recommended performance range of the pump. Selecting a pump that is significantly oversized or undersized may reduce efficiency, increase vibration, and shorten service life.

For water containing particles, fibres, highly corrosive substances, or other special media, the liquid characteristics must be confirmed before selection.

Installation and Maintenance

Install the pump vertically on a firm, level, and vibration-resistant foundation. The inlet and outlet pipelines should be independently supported so that excessive pipe loads are not transferred to the pump connections.

Before starting the pump:

• Confirm that the pump and pipeline are filled with liquid.
• Remove trapped air from the pump and system.
• Check that the inlet valve is fully open.
• Confirm the motor rotation direction.
• Verify that the electrical supply matches the motor requirements.
• Ensure that the pump is not operated without liquid.

Routine maintenance should include checking for abnormal noise, vibration, leakage, overheating, unstable pressure, and changes in motor current. Mechanical seals, bearings, fasteners, electrical connections, and coupling components should be inspected according to operating conditions.

The pump should not be operated dry, and unsuitable liquids should not be transported without confirming material and seal compatibility.

Available Configurations

The CDL Series can be configured according to project requirements, including:

• Different flow and head combinations
• Multiple motor power ratings
• Different numbers of pump stages
• Stainless steel wetted component options
• Different mechanical seal arrangements
• Flange or other applicable connection configurations
• Standard or project-specific voltage and frequency
• Direct-start, soft-start, or variable-frequency control
• Single-pump or multi-pump booster systems
• Integrated control cabinet and pressure-control solutions

Final availability depends on the selected model, operating conditions, and project requirements.

FAQs

1. What information is required to select a CDL pump?

Please provide the required flow, head, liquid type, temperature, voltage, frequency, installation conditions, pipe diameter, and intended application.

2. Is the CDL Series suitable for domestic water supply?

Yes. Its stainless steel wetted components and stable pressure performance make it suitable for many domestic and building water supply applications, subject to local water-quality and material requirements.

3. Can the pump be used with a variable-frequency drive?

Yes. The CDL Series can be integrated with a variable-frequency drive for constant-pressure control, energy-efficient operation, and automatic water supply systems.

4. Can the pump transport wastewater or liquids containing solids?

The CDL Series is primarily designed for clean water and compatible low-viscosity liquids. It is generally not recommended for wastewater containing fibres, large particles, or abrasive solids.

5. Can the material and mechanical seal be customized?

Applicable material grades and sealing arrangements can be selected according to the liquid, temperature, pressure, and project requirements.

6. Can several CDL pumps operate together?

Yes. Multiple pumps can be combined in parallel for variable-demand water supply, pressure boosting, duty-and-standby operation, or higher total flow capacity.

7. What causes unstable pump pressure?

Possible causes include air inside the pipeline, insufficient inlet pressure, incorrect pump selection, blocked piping, valve problems, variable-frequency settings, or changes in system demand.

8. Does the CDL Series support OEM or project-specific configurations?

Project-specific configurations may be provided for motor specifications, control systems, connections, materials, identification plates, packaging, and integrated pump systems.

Contact Chaodun

Shanghai Chaodun Machinery Manufacturing Group Co., Ltd. provides pump selection and project-support services for building water supply, industrial circulation, environmental water treatment, and integrated booster systems.

For an accurate CDL Series pump recommendation, please provide the required flow rate, total head, liquid type, liquid temperature, voltage, frequency, connection diameter, and application conditions. Our team will assist in confirming the appropriate pump model and configuration.