CX-75A Centrifugal Blower

CX-75A belongs to the CX Turbo Medium-pressure Centrifugal Blower, commonly known as medium-pressure turbo blower. Popular brands include Eurostandard, Fullwind, MANVAC, etc. It is an industry-standard direct-coupled aluminum alloy blower rated at 0.75kW (1HP).

✅ Key Specifications (50Hz Standard)

Rated Power: 0.75 kW / 750W (1HP)

Power Supply: Single-phase 220V / Three-phase 380V optional

Air Flow: 13 m³/min (780 m³/h); up to 15 m³/min at 60Hz

Max Positive Pressure: 2.4 kPa (2400 mmH₂O)

Max Negative Pressure: 1.7 kPa (1700 mmH₂O)

Inlet & Outlet: Inlet 125mm, Outlet 100mm

Material: Die-cast aluminum alloy housing + aluminum impeller, direct drive, no belt

Protection Class: IP54/IP55, Class F Insulation

Noise Level: 64~80dB(A)

Net Weight: Approx. 14~17kg (varies slightly by manufacturer)

✅ Structural Features

1. Turbo structure, medium pressure with large air volume, different from high-pressure ring blowers.
2. Motor and impeller are coaxial direct-coupled, compact size, belt-free maintenance.
3. Full die-cast aluminum, lightweight with good heat dissipation; suitable for long continuous operation.
4. Sealed maintenance-free bearings, low maintenance under normal working conditions.

✅ Typical Applications

Combustion fan for burners, hot air drying, hot air circulation in ovens

Short-distance pneumatic conveying of powder/granules, dust extraction, dust collector equipment

Air blowing for printing, laminating, film blowing and coating machines

Equipment cooling, air supply, air transportation, environmental ventilation, woodworking dust collection

✅ Selection & Supporting Points

Search Keywords: CX-75A, Turbo Medium-pressure Blower, 0.75kW Medium Pressure Fan

Optional Accessories: Air filter, silencer, regulating damper, hose connector, shock-absorbing foot pads

Installation: Flexible connectors recommended at inlet and outlet to reduce vibration transmission. An air filter must be installed at the inlet to prevent dust from damaging the aluminum impeller.

✅ Common Troubleshooting

1. Reduced air flow: Clogged inlet filter, air leakage in piping, dust accumulation on impeller
2. Overheat tripping: Overloaded pressure, unstable voltage, blocked heat dissipation passage
3. Abnormal noise: Worn bearing, impeller rubbing casing, foreign objects entering the chamber
4. Excessive vibration: No shock absorption at base, unbalanced impeller, rigid pipe connection

✅ Comparison within the Same Series (For Alternative Selection)

CX-75SA (0.4kW) ＜ CX-75A (0.75kW) ＜ CX-100A (1.5kW) ＜ CX-125A (2.2kW)

CX-75A (0.75kW Turbo Medium-pressure Blower) Application Cases

Core Advantages: Medium pressure and large air volume, direct-coupled maintenance-free design. Suitable for blowing/suction applications with pipeline resistance, different from high-pressure ring blowers. Ideal for small & medium equipment and 24-hour continuous operation.

🔥 Case 1: Air Supply for Burners / Small Industrial Furnaces (Classic Application)

Working Condition: Biomass burners, diesel burners, small incinerators, hot air furnaces for combustion air makeup.

Solution: CX-75A delivers stable medium-pressure air to overcome resistance from burner nozzles and filters, ensuring stable oxygen ratio. Three-phase 380V model for continuous operation.

Accessories: Inlet air filter, manual air damper for flow adjustment; use heat-insulated model CX-75AH for high-temperature working conditions to isolate radiant heat from furnace.

Key Point: Stable air pressure prevents flame-out; many domestic small burners adopt this model as OEM standard.

🧹 Case 2: Dust Collection for Woodworking / Stone Processing

Working Condition: Single-station dust extraction for small CNC wood routers, sanders, stone grinders with dust collection box.

Solution: The blower creates negative pressure to extract wood chips and quartz dust; air flow of 13m³/min supports single-station dust piping.

Note: Install cartridge / primary filter at inlet to avoid aluminum impeller abrasion by dust. Minimize 90° elbows in piping to reduce resistance.

🧾 Case 3: Air Knife Drying for Printing, Laminating & Film Blowing Equipment

Working Condition: Self-adhesive label printers, coating machines, film blowers, label printing, blow off moisture on paper/film surface and assist static elimination.

Solution: CX-75A supplies continuous medium-pressure airflow to air knives to blow off ink moisture, accelerate drying and avoid adhesion.

Feature: Moderate air pressure, will not deform thin paper or film; stable air flow for continuous roll production.

🧪 Case 4: Blow-off for PCB / Glass Washing Lines (Electronics Industry)

Working Condition: Blow residual water after ultrasonic cleaning of PCB etching lines and flat glass.

Solution: Air is fed to air knives to remove water droplets from workpiece surface, lower cost compared with high-pressure air compressors.

Selection Tip: For humid environments, adopt moisture-proof motor treatment and install mist filter at air inlet.

🥣 Case 5: Food Machinery · Short-distance Pneumatic Conveying of Powder & Granules

Working Condition: Grain sorting, sugar powder, starch, plastic pellets short-distance conveying (5~10m pipeline), small centralized feeding machine.

Solution: Positive pressure pushes granular material to overcome resistance from pipe elbows; stainless steel impeller available for food-grade requirements.

Limitation: Only for short-distance and low-concentration conveying; upgrade to CX-100A for long-distance and high powder loading.

💧 Case 6: Aeration for Wastewater Treatment / Aquaculture

Working Condition: Aeration for small biochemical tanks, aquaculture nursery ponds, liquid agitation in electroplating tanks.

Solution: The blower delivers air to microporous aeration discs for water oxygenation; medium pressure overcomes water depth and pipeline resistance.

Tip: Prioritize three-phase IP55 model in humid environments; air inlet filter prevents catkins and debris from blocking aeration discs.

🌡️ Case 7: Hot Air Circulation for Ovens & Constant Temperature Chambers

Working Condition: Hot air circulation in small industrial ovens, drying cabinets, matched with hot air generators.

Solution: CX-75A acts as circulation blower to circulate hot air inside the chamber and guarantee uniform temperature distribution.

High-temperature Condition: Must use heat-insulated CX-75A with heat insulation plate to avoid motor burnout caused by heat conduction.

🛠️ Case 8: Equipment Cooling & Workpiece Chip Removal for Machine Tools

Working Condition: Wave soldering, reflow soldering cooling, CNC machine tool chip blowing, auxiliary cooling for laser equipment.

Solution: Continuous directional airflow to cool workpieces and blow away metal cutting dust.

Selection Trade-off Guidelines (Industrial Practice)

1. Multiple elbows and high filter resistance → CX-75A medium pressure blower; low resistance only requiring large flow → multi-wing centrifugal fan; high negative pressure required → high-pressure ring blower.
2. Single-phase 220V for small standalone equipment; three-phase 380V recommended for factory long continuous operation.
3. For dusty, humid or high-temperature conditions, upgrade accessories or select heat-insulated / corrosion-resistant versions.

Alternative Models for Similar Applications

Lower flow: CX-75SA (0.4kW)

Higher flow: CX-100A (1.5kW)

Complete Industrial Fan Selection Methodology (Applicable for CX Turbo Blowers, Ring Blowers, Centrifugal Fans, Engineering Version)

Core Logic: Define working condition boundaries → Calculate air flow and pressure → Select fan type → Verify medium & environment → Select motor & material → Check safety margin → Match accessories

Step 1: Collect Basic Working Condition Parameters (Prerequisite for Selection)

1. Application: Positive pressure blowing / Negative pressure suction / Hot air circulation / Pneumatic conveying / Aeration / Dust collection
2. Medium: Ambient air / Hot air / Dust-laden air / Moisture/oil mist / Corrosive gas

Clean ambient air: Standard aluminum turbo blower (CX-75A for example)

High temperature: Heat-insulated turbo blower, high-temperature resistant centrifugal fan (heat insulation plate required to prevent heat transfer to motor)

Heavy dust: Thickened impeller, pre-filter; heavy dust service: wear-resistant coating or stainless steel impeller

Corrosive gas: FRP / stainless steel housing with anti-corrosion coating

3. Medium Temperature: Ambient (≤40℃), Medium temperature (40~180℃), High temperature (＞180℃)
4. Environment: Indoor / Outdoor, humid, explosion-proof requirement (Ex-proof motor mandatory for flammable gas/dust)
5. Operation Mode: Intermittent start-stop / 24h continuous operation (three-phase motor, Class F insulation preferred for continuous duty)

Step 2: Calculate Required Air Flow Q (m³/min)

Air Flow = Process Base Flow × Safety Factor

1. Source of base process flow:

Dust collection: Air velocity at suction port × cross-sectional area of suction port; recommended suction velocity for dust:18~25m/s

Air knife drying: Cross-sectional area of air knife × designed outlet velocity

Pneumatic conveying: Air volume for material carrying + pipeline leakage

Combustion air supply: Theoretical air volume calculated by fuel combustion

2. Safety Factor: Normally 1.1~1.3; adopt 1.3 for long pipelines, many elbows and easy filter clogging.

Example: Process requirement 10m³/min, factor 1.3, selected air flow ≥13m³/min → CX-75A is suitable.

Step3: Calculate Total Pressure P (Pa/kPa)【Most Common Pitfall】

Fan total pressure is used to overcome total system resistance: pipeline resistance + filter resistance + elbows/reducers/valves + internal equipment resistance

1. Resistance components:

Friction loss of straight pipe

Local resistance (90° elbow, tee, reducer, flexible joint, air damper, filter)

Equipment internal resistance (burner, filter cartridge, air knife, aeration disc)

2. Selection Rule: Fan rated pressure ≥ Total system resistance × 1.1~1.2 margin

Quick comparison of fan categories by pressure range:

Important Reminder: Do NOT select fan only by power rating! For same 0.75kW, ring blower delivers high pressure but low flow; CX-75A features medium pressure and large flow.

Step4: Selection of Fan Structure & Drive Type

1. Direct-coupled (CX Series): Motor and impeller coaxial, compact size, maintenance-free, fixed speed; suitable for small & medium power and 24h continuous running, CX-75A belongs to this type. Disadvantage: Speed cannot be adjusted without VFD.
2. Belt Drive: Speed adjustable via pulley, for larger power; disadvantage: belt periodic replacement, maintenance required.
3. Coupling Drive: High-power industrial centrifugal fans for large dust collection and ventilation.

Step5: Motor, Power Supply & Protection Class Selection

1. Power Supply:

Single-phase 220V: Small power, intermittent operation of standalone machine

Three-phase 380V: Preferred for continuous factory operation, higher efficiency and better overload capacity

2. Insulation Class: Class F recommended for continuous operation; Class H for high temperature
3. Protection Class:

IP54: Normal dry workshop

IP55: Humid & dusty workshop (common for CX series)

IP65: Heavy dust and water spray environment

4. Explosion Proof: Ex-proof motor required for flammable dust/gas.

Step6: Working Condition Verification (Eliminate Unsuitable Models)

1. Pneumatic Conveying: Short-distance, low concentration → CX turbo blower; long-distance high concentration → Roots blower
2. Negative Pressure Dust Extraction: Prioritize negative pressure check when pipeline resistance is high; Max negative pressure of CX-75A is 1.7kPa, switch to ring blower if exceeding.
3. Hot Air: Standard CX fan cannot be used directly for hot air; heat conduction will burn motor, use CX-H heat-insulated model with heat shield.
4. Noise Requirement: Install inlet/outlet silencer, shock pad and flexible joint for noise above 65dB.

Step7: Selection of Auxiliary Accessories (Indispensable for System, Often Neglected)

Inlet side: Air filter (mandatory for dusty application), silencer, vacuum/pressure gauge

Outlet side: Silencer, check valve (prevent backflow after shutdown), manual/electric damper, flexible canvas joint

Base: Shock-absorbing foot pads to reduce vibration transmission; flexible joint is mandatory for rigid pipe connection to avoid casing crack.

Step8: Simplified Decision Flow Chart for CX-75A Selection

1. Process air flow 8~13m³/min, total system resistance 1~2.4kPa

✅ Prefer CX-75A (0.75kW Turbo Medium-pressure Blower)

2. Air flow less than 8m³/min, resistance 1~2kPa → CX-75SA (0.4kW)
3. Air flow＞13m³/min, resistance 2~3kPa → CX-100A (1.5kW)
4. System resistance＞3kPa → Abandon CX turbo blower, select ring blower
5. Resistance＜1kPa, only large circulation flow required → Multi-wing centrifugal fan

Step9: Common Selection Mistakes

1. ❌ Select fan only by motor power: Fans with identical power rating have huge difference in air flow and pressure for different types.
2. ❌ No resistance margin reserved: Filter clogging increases system resistance in service and leads to insufficient flow.
3. ❌ No filter for dusty working conditions, resulting in rapid impeller wear and shortened service life.
4. ❌ Use standard CX blower directly for high-temperature air, causing motor burnout by heat conduction.
5. ❌ Rigid pipe connection at inlet/outlet, vibration causes casing crack and weld fracture.

Step10: Deliverable List for Fan Selection Document

1. Process air flow and total system resistance
2. Medium parameters, temperature, dust condition
3. Fan model, operating point on P-Q performance curve (must stay within high-efficiency zone)
4. Motor parameters: Voltage, power, insulation, protection class, explosion-proof requirement
5. Material, inlet & outlet dimension
6. Accessory list and vibration isolation scheme

CX Turbo Medium-pressure Blower Full Model List (50Hz, Standard Ambient Model, Same Series as CX-75A)

Suffix Description:

A: Standard direct-coupled type; H: High-temperature heat-insulated model (CX-XXAH), fitted with heat shield for hot air service

Power Supply: 1~ Single-phase 220V / 3~ Three-phase 380V; small models support both single & three phase, large models only three-phase

Size: IN=Inlet, OUT=Outlet; flow and pressure refer to maximum parameters under 50Hz

Derived High-temperature Models (CX-XXAH, with Heat Shield for Hot Air / Furnace Combustion)

CX-75SAH (0.4kW, high temp version of CX-75SA)

CX-75AH (0.75kW, high temp version of CX-75A, for oven and burner hot air supply)

CX-100AH (1.5kW)

CX-125AH (2.2kW)

CX-150AH (3.7kW)

Quick Selection Reference

1. CX-65A (0.2kW): Low flow and low resistance, small equipment cooling and simple air blowing
2. CX-75SA (0.4kW): Low power blow/suction, small label machines, small aquaculture aeration
3. CX-75A (0.75kW): Most versatile, combustion air supply, air knife drying, single-station dust collection (target model)
4. CX-100A (1.5kW): Dual-station dust collection, large flow air knife, pneumatic conveying
5. CX-125A (2.2kW): Multi-station dust collector, oven hot air circulation, powder conveying
6. CX-150A (3.7kW): Large dust collection, industrial furnace combustion air, large flow aeration

Important Notes

1. Models from different manufacturers (Fullwind, MANVAC, Ouguan etc.) have consistent performance parameters, only slight weight difference.
2. Air flow and pressure rise by approx.15% under 60Hz; check 60Hz performance curve for export projects.
3. This series is turbo medium-pressure blower, not the same series as HTB multi-stage turbo blower and RB high-pressure ring blower, do not mix them up.