Explosion proof high-pressure vortex fan

NegotiableUpdate on 05/06

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Nature of the Manufacturer: Producers

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Overview

Explosion proof high-pressure vortex fan is a special fan designed for flammable and explosive environments. It adopts explosion-proof motor and special sealing structure, and can operate safely in places with explosive gas mixtures. Compared to ordinary fans, it can maintain high air pressure (up to 650mbar) and large air volume while ensuring that it does not become a detonation source, and is widely used in high-risk industries such as chemical, coal mining, and pharmaceuticals.

Product Details

Explosion proof high-pressure vortex fanCore Features：

Explosion proof level: DIIBT4/DIICT4, protection level IP55, insulation level F
Material: Aluminum alloy die-casting shell, lightweight (15-100kg), good heat dissipation
Oil free operation: clean output air, suitable for the food and pharmaceutical industries
Dual use of blowing and suction: One machine with multiple functions and flexible applications

2、 Working principle and core structure

1. Explosion proof high-pressure vortex fanPrinciple of Vortex Boosting

The motor drives the impeller to rotate at high speed (2800-3500rpm), and gas enters from the inlet:

The impeller blades push the gas to form a spiral motion, generating centrifugal force
The gas is squeezed into the side groove, and after the pressure rises, it returns to the impeller to accelerate again
After multi-stage pressurization, it is finally discharged from the air outlet, forming a high-pressure airflow

2. Explosion proof core structure

component	Explosion proof function	characteristic
Explosion proof shell	Isolate internal sparks from external explosive gases	Made of cast iron/aluminum alloy material, with special design for the joint surface
sealed system	Prevent explosive gases from entering the interior of the motor	Double protection of V-shaped shaft seal ring and sealing ring
Explosion-proof motor	Prevent electrical sparks from igniting explosives	Special winding design, F-class insulation, temperature control
heat dissipation structure	Control surface temperature below ignition point	Parallel and vertical heat sinks increase the heat dissipation area

3、 Technical parameters and explosion-proof standards

1. Key performance parameters

power range：0.75kW-30kW， Common specifications: 1.5kW, 3kW, 5.5kW, 7.5kW, 11kWpressure range: 50mbar-650mbar (approximately 0.5-6.5kPa)Airflow range：40-1134m³/hrotation speed：2800-3500rpmOperating Temperature-10 ℃~+50 ℃ (standard type), high temperature type can reach 260 ℃

2. Detailed explanation of explosion-proof standards

Explosion proof grade identification：Ex d IIB T4

ExExplosion proof mark
dExplosion proof type (common explosion-proof type)
IIBApplicable gas groups, such as ethylene, etc
T4Temperature group, surface high temperature ≤ 135 ℃

Gas group selection：

IIA level: Propane and other generally flammable and explosive gases
IIB level: Hazardous gases such as ethylene
IIC level: The most dangerous gases such as hydrogen (DIICT4 should be selected)

4、 Selection Guide: Five Step Selection Method

1. Determine the usage environment

Types of hazardous gasesDetermine the category of explosive gases/dust present in the location (such as hydrogen gas at level IIC)
environmental conditionsTemperature (-10 ℃~+50 ℃), humidity (<85%), dust concentration
Installation methodFixed/mobile, indoor/outdoor (choose WF1 outdoor anti-corrosion type)

2. Computational performance requirements

Airflow calculation：

Inhalation application: S (suction port area) ≥ 1/2 of the fan inlet cross-sectional area
Blowing application: S (air outlet area) ≥ 1/2 of the fan outlet cross-sectional area

Wind pressure calculation：

Pipeline resistance+equipment resistance+environmental pressure (if underwater aeration requires consideration of water depth pressure<70% static pressure)

3. Explosion proof level matching

Must be followed：

Explosion proof level ≥ environmental hazard level (such as choosing DIIBT4 or higher for IIB environment)