CGDL-20-2 High-Efficiency Low-Noise Marine Centrifugal Fan for Cabin Ventilation

The CGDL-20-2 is a direct-coupled, horizontal centrifugal fan featuring a 20-centimeter aluminum alloy impeller with aerofoil-shaped blades. This design enables the unit to achieve efficiency levels exceeding 80%, delivering stable airflow with reduced acoustic signature. For naval architects and marine engineers, the model offers a practical balance between performance and spatial economy, with an overall design that prioritizes ease of installation and long-term reliability in corrosive salt-laden environments.

Key Specifications At a Glance

Parameter	50 Hz	60 Hz
Air flow	400 – 800 m³/h	600 – 1000 m³/h
Total pressure	380 – 570 Pa	440 – 790 Pa
Speed	2,920 r/min	3,500 r/min
Sound pressure level	62 – 63 dB(A)	67 dB(A)
Motor power	0.37 kW	0.37 kW
Motor type	Y7112-H / JY711-2-H	Y7112-H / JY711-2-H

Drawing

Frequently Asked Questions (FAQ)

Q1: What is the difference between 50 Hz and 60 Hz operation for the CGDL-20-2? 

The same unit can run on either shipboard power supply. At 50 Hz the motor turns at 2,920 r/min, delivering 400–800 m³/h at up to 570 Pa; at 60 Hz it runs at 3,500 r/min, pushing 600–1,000 m³/h at up to 790 Pa. Always confirm the vessel's electrical supply frequency when ordering.

Q2: Is the CGDL-20-2 suitable for use in explosive or hazardous atmospheres? 

No. The standard CGDL-20-2 is a general-ventilation fan for non-hazardous spaces such as cabins, galleys, control rooms and pump rooms. For tankers, engine-room explosion zones or gas-risk areas, please refer to our CBGD series spark-proof / explosion-proof centrifugal fans, which are derived from the CGDL platform.

Q3: What are the power supply options?

Standard configuration is AC 3-phase 380 V / 50 Hz and AC 3-phase 440 V / 60 Hz. Other voltages can be factory-supplied on request — please specify at the enquiry stage.

Q4: Can the discharge direction be adjusted on site?

For the CGDL-20 (impeller size 20), the casing orientation is set at the factory. Customers should state the required discharge angle (e.g., 0°, 90°, 180°, 270°) when placing the order. Larger sizes in the CGDL series (No. 40 and above) support field-adjustable casing rotation in 22.5° increments up to 225°.