Description
Noise Centrifugal Blower
Designed for stable, low-vibration air delivery in ventilation, cooling, and air-conveying systems — with a rigid steel build that keeps output steady shift after shift.
Product Specifications
Performance data, outlet flange sizing, and installation dimensions for LWLDB series models (1A to 7A).
| Model | Power (W) | Speed (r/min) | Voltage (V) | Air Volume (m³/h) | Total Pressure (Pa) |
|---|---|---|---|---|---|
| LWLDB-2A-0.06-2P-1-001 | 60 | 2800 | 220/380 | 240 | 310 |
| LWLDB-1A-0.12-2P-1-001 | 120 | 2800 | 220/380 | 350 | 390 |
| LWLDB-2A-0.18-2P-1-002 | 180 | 2800 | 220/380 | 405 | 450 |
| LWLDB-3A-0.25-2P-1-001 | 250 | 2800 | 220/380 | 505 | 860 |
| LWLDB-4A-0.37-2P-1-001 | 370 | 2800 | 220/380 | 660 | 860 |
| LWLDB-5A-0.55-2P-1-001 | 550 | 2800 | 220/380 | 850 | 1020 |
| LWLDB-6A-0.75-2P-1-001 | 750 | 2800 | 220/380 | 1200 | 1210 |
| LWLDB-7A-1.1-2P-1-001 | 1100 | 2800 | 220/380 | 1800 | 1500 |
| Model | Motor (W) | A1 | A2 | A3 | B1 | B2 | B3 | D | M | N | I | H | P | L | C1 | C2 | C3 | H1 | jxk | Weight (kg) |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| LWLDB-1A | 60 | 115 | 95 | 62 | 115 | 95 | 62 | Φ6.5 | 95 | 92 | 88 | 128 | 68 | 264 | 60 | 65 | 63 | 63 | Φ10 | 4.8 |
| LWLDB-2A | 180 | 125 | 110 | 72 | 115 | 95 | 62 | Φ7 | 95 | 92 | 88 | 126 | 68 | 270 | 60 | 102 | 70 | 63 | Φ10 | 4.8 |
| LWLDB-3A | 250 | 115 | 96 | 70 | 115 | 96 | 54 | Φ7 | 123 | 112 | 110 | 165 | 108 | 250 | 60 | 112 | 66 | 71 | Φ10 | 7.2 |
| LWLDB-4A | 370 | 160 | 118 | 102 | 120 | 96 | 58 | Φ7 | 123 | 112 | 110 | 165 | 108 | 320 | 90 | 112 | 95 | 71 | Φ10 | 8.5 |
| LWLDB-5A | 550 | 140 | 112 | 82 | 120 | 92 | 58 | Φ8 | 150 | 152 | 135 | 191 | 130 | 325 | 90 | 112 | 88 | 71 | Φ10 | 11 |
| LWLDB-6A | 750 | 160 | 140 | 103 | 120 | 90 | 58 | Φ8 | 150 | 152 | 135 | 191 | 131 | 345 | 90 | 112 | 98 | 71 | Φ10 | 11.7 |
| LWLDB-7A | 1100 | 183 | 155 | 202 | 202 | 174 | 138 | 8-Φ8 | 176 | 144 | 142 | 227 | 126 | 380 | 100 | 125 | 96 | 80 | Φ10 | 17 |
Thickened Carbon Steel Casing
The volute casing is rolled from heavy-gauge carbon steel to hold its shape under continuous static pressure, so airflow delivery stays consistent even in dusty or humid workshop conditions.
A baked painted finish adds a layer of protection against surface wear and corrosion, while the reinforced mounting base keeps the unit anchored and resistant to vibration during daily duty.
- Heavy-gauge steel volute — resists deformation under sustained pressure
- Painted protective finish — guards against wear and corrosion
- Reinforced mounting base — solid anchoring for fixed installations
Efficient Air Delivery for Faster Air Renewal
The centrifugal impeller converts motor power into a strong, steady stream of air, exchanging stale or overheated indoor air quickly instead of letting heat and fumes accumulate on the floor.
The rectangular outlet discharges air in a concentrated, directional flow that connects cleanly to ducting, so renewal cycles stay fast across long duct runs without extra booster units.
- Concentrated discharge — directed output reaches further into the space
- Faster heat removal — shortens air renewal cycles in enclosed workshops
- Duct-ready outlet — standard flange sizing for easy integration
Optimized Centrifugal Impeller for Stable Airflow
The impeller is punched and formed as a matched set with the casing, so blade clearances stay tight and airflow leaves the wheel evenly instead of pulsing — the result is steadier pressure at the outlet.
Each impeller is balanced before assembly to keep rotation smooth at 2,800 r/min, holding airflow and pressure steady through long running hours with minimal drift.
- Reduced turbulence — even blade spacing smooths the airflow path
- Precision balancing — stable pressure output at full speed
- Consistent delivery — airflow holds steady over continuous duty
Reliable Motor for Continuous Operation
Every model pairs its impeller with a motor sized for the actual load, from 60W on the compact LWLDB-2A up to 1,100W on the LWLDB-7A, so the windings are never pushed past their design margin.
Both 220V single-phase and 380V three-phase versions are available in the same frame sizes, which makes the series easy to deploy across mixed workshop power supplies without custom engineering.
- Matched power ratings — 60W to 1,100W coverage across eight models
- 220V / 380V options — single-phase and three-phase in the same series
- Continuous duty design — stable output for all-day ventilation
Low Noise & Stable Operation
A rigid volute, balanced impeller, and matched motor work together to keep vibration at the casing low, so the blower runs quietly enough for workshops and work areas where noise is a daily concern.
The one-piece mounting base isolates the unit from the floor and prevents the rattle and shifting that loosen installations over time, keeping performance stable across long service periods.
- Balanced rotating assembly — less vibration transferred to the casing
- Quieter work environment — suitable for noise-sensitive areas
- Stable long-term operation — no loosening or drift under continuous duty
Protective Inlet Mesh
The orange metal guard over the inlet keeps hands, tools, and loose clothing away from the rotating impeller — an important safeguard for blowers installed at floor level in busy workshops.
The expanded metal mesh also stops larger debris from being drawn into the volute, protecting the impeller surface and keeping the airflow path clear without noticeably restricting intake.
- Contact protection — shields personnel from rotating components
- Debris blocking — keeps foreign objects out of the impeller chamber
- Low restriction intake — open mesh maintains full airflow
Two Configurations for Different Operating Needs
Choose the right configuration based on installation space, duct layout, and the working temperature around the blower.
General Ventilation & Conveying
Compact motor-to-casing layout for workshop ventilation, equipment cooling, and air-conveying duties at normal ambient temperatures.
Extended Shaft Heat Isolation
The extended shaft increases the motor-to-casing distance, slowing heat transfer from hot air streams and protecting the motor windings.
Wide Application Fields
From workshop ventilation to drying, conveying, and equipment cooling, the LWLDB series keeps air moving steadily across industrial sites.
Workshop Ventilation
Continuous fresh-air supply and heat extraction for production and assembly floors.
Air Conveying Systems
Steady pressure for ducted conveying and process air distribution lines.
Drying Equipment
Drives hot-air circulation and moisture exhaust in ovens, dryers, and curing lines.
Printing Machinery
Stable suction and drying airflow for presses, folders, and post-press lines.
Packing Equipment
Reliable air supply for bag forming, filling, sealing, and labelling stations.
Electrical Cooling
Forced-air cooling for control cabinets, transformers, and electrical enclosures.
LONGWELL — Trusted Industrial Fan Manufacturer Since 1990
Founded in 1990 in Yuyao, Ningbo — the heart of China’s advanced manufacturing belt — LONGWELL has grown from a precision fan component workshop into a vertically integrated ventilation technology group. Today we engineer AC, DC and EC fan and motor systems with 4,000 m²+ of manufacturing floor, dedicated aerodynamics and CFD simulation labs, and a global export network spanning Europe, the Americas and Asia-Pacific.
From material selection to final balancing, every LONGWELL fan is built on automated lines, computer-balanced impellers and 100% run-test before shipment. We are certified to ISO 9001:2015 and ISO 14001, with CE, UL/ETL, RoHS and EAC compliance, and performance tested to the AMCA 210/211 method.
Production & Delivery
Automated lines, computer-balanced impellers and 100% run-test ensure every LWLDB blower ships ready for installation.
Global Market & Client Preference
LWLDB series is the preferred centrifugal blower for HVAC distributors, equipment manufacturers and OEM clients across Europe, the Middle East, Southeast Asia, and South America.
Trusted by Leading Global HVAC Brands
24+ HVAC OEMs and equipment builders rely on LONGWELL for industrial centrifugal fans every year.
Complete Range of Professional & Certified
LONGWELL fans are independently certified to international quality, safety and energy-efficiency standards.
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View Product →Frequently Asked Questions
Quick technical answers regarding the LWLDB series noise centrifugal blower.
What is the LWLDB noise centrifugal blower designed for?
The LWLDB series is designed for stable, low-vibration air delivery in ventilation, cooling, and air-conveying systems, including factory workshops, equipment cooling lines, and ducted air distribution.
What configurations are available in the LWLDB series?
Two configurations are offered: the standard type for general ventilation, cooling, and air-conveying applications, and the high-temperature type with an extended shaft that increases the motor-to-casing distance to help reduce heat transfer.
What are the airflow and pressure ranges of the LWLDB series?
Air volume ranges from 240 m³/h on the LWLDB-2A up to 1,800 m³/h on the LWLDB-7A, with total pressure from 310 Pa up to 1,500 Pa across the eight available models.
What voltage and power options does the LWLDB series support?
All models run at 2,800 r/min on 2-pole motors with 220V or 380V supply, covering power ratings from 60W to 1,100W from LWLDB-1A through LWLDB-7A.
How does the protective inlet mesh improve safety?
The metal inlet guard prevents accidental contact with rotating components and blocks larger foreign objects from entering the blower, allowing safe operation in open workshop environments.
Does LONGWELL offer OEM or custom options for the LWLDB series?
Yes. LONGWELL provides full OEM/ODM support including custom outlet flange dimensions, mounting base modifications, motor and voltage matching, and private label branding.
Need a Quote or Custom Specs?
Tell us your airflow, pressure, and installation requirements — our engineers will match the right LWLDB model and quote within 24 hours.
