Booster Fan

Booster 4028 (Version 2)

Name: Booster 4028 (Version 2) Booster Fan
Brand: Ruifengda

The Booster 4028 (Version 2) is a 40 × 40 × 28 mm high-pressure booster with dual-ball bearings as standard. It mounts in-line on ducting or directly on an enclosure wall to push air through long, restrictive paths.

Frame Size40 × 40 × 28 mm

Voltage12 V DC

Max Airflow≈ 14 CFM

BearingSleeve / One-ball / Dual-ball

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Product Overview

The Booster 4028 (Version 2) targets the middle ground between axial airflow and centrifugal pressure: a 40 × 40 × 28 mm booster with steep blade pitch for resistance-heavy paths.

Our Shenzhen line builds the Booster 4028 (Version 2) end to end — winding, balancing, assembly and 100 % aging. Because no step is outsourced, we can hold batch consistency and adjust bearing grade, lead length or speed binning to your production schedule.

Key Features

Dual-ball bearing as standard for high-temperature, long-hour duty
Static pressure significantly higher than same-size axial fans
Reinforced impeller balanced to G6.3 for stable high-speed running
Ideal as an in-line booster on existing ducting
12 V / 24 V DC input with PWM control option
Tach signal available for airflow monitoring

Note: Figures shown are standard-configuration values. Custom speed bins, voltage windows and bearing grades are quoted against your requirement.

Typical Applications

Ventilation ducts & tunnels Chassis positive-pressure systems Range hoods & exhaust lines Equipment cabinet forced air Aquarium & hydroponics Long restrictive airflow paths

Full Specifications

Frame Size	40 × 40 × 28 mm
Rated Voltage	12 V DC (24 V optional)
Rated Current	0.45 A (at rated voltage, max speed)
Speed	7,000 rpm (typical; PWM control 0–100 %)
Airflow	14 CFM / 24 m³/h (typical, free air)
Static Pressure	165 Pa / 16.8 mmH₂O (typical, max)
Noise	38 dBA at 1 m (max speed)
Speed Signal	Tach (FG) optional; PWM control optional
Bearing Type	Sleeve / One-ball / Dual-ball
Expected Life	50,000 h at 25 °C, 65 % RH (L10)
Operating Temp.	−10 °C to +70 °C (standard); −40 °C to +85 °C optional
Insulation Resistance	≥ 100 MΩ at 500 VDC
Dielectric Strength	500 VAC / 1 min (AC series: 1,500 VAC)
Frame & Impeller	UL94 V-0 PBT + fibreglass
Certification	CE / RoHS (UL on request)

Frequently Asked Questions — Booster 4028 (Version 2)

What makes Booster 4028 (Version 2) a booster fan?

Booster 4028 (Version 2) uses a high-static-pressure impeller and stator design that keeps airflow under strong back pressure — suited to dust filters, long ducts, range hoods and dense radiators where ordinary fans lose most of their CFM.

Can Booster 4028 (Version 2) be daisy-chained in series?

Yes, two Booster 4028 (Version 2) units in series roughly add their static pressure capability. Mount them with a short spacing section and confirm the second fan's inlet conditions with our engineers.

What protection options exist for Booster 4028 (Version 2)?

Auto-restart, polarity protection, tach and alarm signals are available. For humid or oily environments, conformal-coated PCBAs and IP54 grilles can be added.

What is the lead time and MOQ for Booster 4028 (Version 2)?

Samples ship in 5–7 working days; volume MOQ is typically 200–500 pcs depending on configuration. Custom voltage, speed or connector versions need 10–15 days for first samples.