FB-7.5 Explosion proof High Pressure Fan

Shanghai Quanfeng Industrial Co., Ltd. focuses on production and salesExplosion-proof fanWhile gathering the strengths of various schools, the explosion-proof fan is made of aluminum alloy material and the motor is used as a wholeAdopting YB2 series explosion-proof three-phase asynchronous electric motorThere will never be any sparks generated by friction, making it more reassuring to use,

1、 The explosion-proof levels are DIIBT4 and DIICT4, with a protection level of IP54 and an insulation level of F. The explosion-proof standards comply with the provisions of GB3836.1-2000 "Electrical Equipment for Explosive Gas Environments Part 1 General Requirements" and GB3836.2-2000 "Electrical Equipment for Explosive Gas Environments Part 2 Explosion proof Type D", as well as IEC60079-1 and European standards.

2、 High explosion-proof and reliable operation: The motor protection is extremely IP55, the shaft through position adopts V-shaped shaft sealing ring, the junction box adopts circular sealing ring with encrypted sealing ring to improve the machining accuracy of main components, the machine base adopts parallel and vertical heat dissipation fin structure, increases the heat dissipation area and other electrical and mechanical design measures. In terms of dust and water resistance, the motor operation is more reliable. Better explosion-proof performance. Having the advantages of *, independent core technology, and * usage effect, through multiple repeated experiments and tests, various technical requirements, quality, standards, and usage effects have reached the applicable requirements, and * fan product level; Obtained * in the industry;

FB-7.5-5.5KW explosion-proof fan/explosion-proof high-pressure fanSuitable for places where explosive gas mixtures are present:

Ex -- DIICT4 series explosion-proof fans are suitable for methane or other gas transportation; The EX-DIBT4 series explosion-proof fan is suitable for non mining working face environments in coal mines where explosive mixtures of dust or coal ash are present.
Ex-DIICT4 is suitable for use in factories with Class II Phase A, temperature groups T1, T2, T3, and T4, in environments where explosive gas dust mixtures exist.
Ex-DIIBT4 is suitable for use in factory environments with Class II, Class B, temperature groups T1, T2, T3, and T4 explosive gas mixtures.
On the basis of the FB-2 basic series electric fan, it can also be made into FB-2-W outdoor type, FB-2-WF1 outdoor medium anti-corrosion type and other climate environments.

Full wind explosion-proof fanProduct classification: can be divided into:; Explosion proof blower, high-pressure explosion-proof fan, medium pressure explosion-proof fan, variable frequency explosion-proof fan, insulation explosion-proof fan, centrifugal explosion-proof fan, high temperature resistant explosion-proof fan, explosion-proof vortex air pump; Explosion proof fans for conveying dust, explosion-proof fans for conveying gas, explosion-proof fans for mining, etc;

　Dust explosion-proof fanAttention should be paid to the following matters when applying

*Combustible dust is suspended in the air at an appropriate concentration
*There is sufficient air and oxidant
*There is a fire source or strong vibration and friction, and seven types of dust are explosive
*Metals (such as magnesium powder, aluminum powder)
*Coal; Grain (such as wheat, starch)
*Feed (such as blood meal, fish meal)
*Agricultural and sideline products (such as cotton, tobacco)
*Forest products (such as paper powder, wood powder)
*Synthetic materials (such as plastics, dyes)
*The dust generated during the production process of certain factories and mines, especially the dust generated during the processing of organic matter, can cause explosion and combustion accidents under certain specific conditions.

Gas explosion-proof fanExplosion proof blower, made of integral cast aluminum; Exquisite appearance, suitable for: chemical plants, coal mines, tunnels, boilers, canning, glass industry, ventilation and exhaust, automatic cleaning, packaging, fish pond oxygen supply, aeration, garbage decomposition, gas transportation, gas transportation, environmentally friendly aquaculture, etc.

Gas explosion-proof fanStable performance, high pressure, strong vacuum degree, good sealing, no air leakage, no oil or gas, explosion-proof certificate<motor>, safe and reliable, aluminum alloy casting; The output air is clean and has high accuracy; Small in size and pollution-free.

Working principle of explosion-proof blowerExplosion proof vortex fan - a vortex fan with both suction and delivery functions. The vortex air pump has a special blade design, which features high pressure, large air volume, low noise, and high temperature resistance. Explosion proof fans have strong insulation performance, easy installation, and high stability. The gas passing through is oil-free and dry.

Explosion proof blowers are mainly used in coal mines, oil and gas, petrochemical and chemical industries. In addition, it is widely used in sectors such as textiles, metallurgy, urban gas, transportation, grain and oil processing, papermaking, and medicine. Explosion proof motors, as the main power equipment, are usually used to drive pumps, fans, compressors, and other transmission machinery.

Introduction to the Application of Explosion proof Motor in Explosion proof Blowers

1、 The concept of explosion-proof motorExplosion proof motor is a type of motor that can be used in flammable and explosive factories without generating electrical sparks during operation. Explosion proof motors are mainly used in coal mines, oil and gas, petrochemicals, and chemical industries. In addition, it is widely used in sectors such as textiles, metallurgy, urban gas, transportation, grain and oil processing, papermaking, and medicine. Explosion proof motors, as the main power equipment, are usually used to drive pumps, fans, compressors, and other transmission machinery. According to the principle of explosion prevention, motors can be divided into explosion-proof motors, increased safety motors, positive pressure motors, spark free motors, and dust explosion-proof motors.

IIExplosion proof blowerThe basic principle of

1. The concept of explosion

In a very short period of time, it releases a large amount of energy, generates high temperature, and releases a large amount of gas, causing high-pressure chemical reactions or state changes in the surrounding medium. The rapidly released energy will cause violent impact and damage to surrounding objects. The three conditions that must be met for an explosion are: 1) Explosive substances: substances that can react with oxygen (air), including gases, liquids, and solids. (Gas: hydrogen, acetylene, methane, etc.; Liquid: alcohol, gasoline; Solid: dust, fiber dust, etc.) 2) Oxygen: air. 3) Ignition sources: including open flames, electrical sparks, mechanical sparks, electrostatic sparks, high temperatures, chemical reactions, light energy, etc.

2. Reasons and considerations for explosion-proof blower

Explosive substances: Many production sites produce certain flammable substances. About two-thirds of the underground coal mines contain explosive substances; In the chemical industry, over 80% of production workshop areas contain explosive substances. Oxygen: Oxygen in the air is ubiquitous. Ignition source: Electrical instruments are widely used in the production process, and various frictional sparks, mechanical wear sparks, electrostatic sparks, high temperatures, etc. are inevitable, especially when instruments and electrical components fail. Objectively, many industrial sites meet explosive conditions. When the concentration of explosive substances mixed with oxygen is within the explosive limit range, if there is an explosion source, an explosion will occur. Therefore, it is necessary to adopt explosion-proof measures.

IIIExplosion proof blowerClassification of Hazardous Areas:

1. Dangerous gas dust

　　

Explosive substances	Regional definition	Chinese standards	North American standards
Gas (Class I)	Places where explosive gas mixtures exist continuously or for a long time under normal circumstances	Zone 0	Div.1
	Places where explosive gas mixtures may occur under normal circumstances	Zone 1
	Explosive gas mixtures are unlikely to occur under normal circumstances, only in places where they occasionally or briefly occur under abnormal conditions	Zone 2	Div.2
Dust or fiber (CLASS II/III)	Under normal circumstances, explosive dust or combustible fibers mixed with air may occur continuously, frequently for a short period of time, or exist for a long time in a place	Zone 10	Div.1
	Under normal circumstances, explosive dust or mixtures of combustible fibers and air should not occur, only in places where they occasionally or briefly occur under abnormal conditions	District 11	Div.2

2. Applicability of explosion-proof blower method to hazardous areas:

　　

serial number	Explosion proof type	code name	National Standard	Explosion proof measures	Applicable Region
1	flameproof type	d	GB3836.2	Isolate existing ignition sources	Zone1,Zone2
2	Increased safety type	e	GB3836.3	Try to prevent the generation of ignition sources	Zone1,Zone2
3	Intrinsic safety type	ia	GB3836.4	Limit the energy of ignition sources	Zone0-2
	Intrinsic safety type	ib	GB3836.4	Limit the energy of ignition sources	Zone1,Zone2
4	Positive pressure type	p	GB3836.5	Separate hazardous substances from ignition sources	Zone1,Zone2
5	Oil filled type	o	GB3836.6	Separate hazardous substances from ignition sources	Zone1,Zone2
6	Sand filling mold	q	GB3836.7	Separate hazardous substances from ignition sources	Zone1,Zone2
7	Non sparking type	n	GB3836.8	Try to prevent the generation of ignition sources	Zone2
8	exm	m	GB3836.9	Try to prevent the generation of ignition sources	Zone1,Zone2
9	Airtight type	h	GB3836.10	Try to prevent the generation of ignition sources	Zone1,Zone2

3. Classification of Explosive Hazardous Gases

According to the potential small spark energy, explosive gases are classified into four hazard levels in China, Europe, and most countries and regions around the world, as shown in the table below:

Working condition category	Gas classification	Representative gases	Small detonation spark energy
Under the mine	Ⅰ	methane	0.280mJ
Factories outside the mine	ⅡA	propane	0.180mJ
	ⅡB	ethylene	0.060mJ
	ⅡC	hydrogen	0.019mJ

The United States and Canada first classified explosive objects scattered in the air into three classes: Class I gases and vapors; CLASS II dust; CLASS III fiber Then divide the gas and dust into groups:

Group Name	Representative gases or dust
A	acetylene
B	hydrogen
C	ethylene
D	propane
E	Metal dust
F	Coal dust
G	Grain dust

Classification of gas temperature groups:

Temperature group	Safe surface temperature of objects	Common explosive gases
T1	≤ 450℃	46 types including gas, acrylonitrile, etc
T2	≤ 300℃	47 types of acetylene, ethylene, etc
T3	≤ 200℃	36 types of gasoline, butyraldehyde, etc
T4	≤ 135℃	Six types including acetaldehyde, tetrafluoroethylene, etc
T5	≤ 100℃	carbon disulfide
T6	≤ 85℃	Ethyl nitrate

The meaning of Ex (ia) Ⅱ C T6:

logo content	symbol	meaning
Explosion proof declaration	Ex	Comply with certain explosion-proof standards, such as China's national standards
Explosion proof method	ia	Adopting Class IA intrinsic safety explosion-proof method, it can be installed in Zone 0
gas category	ⅡC	Permitted to involve Class IIC explosive gases
Temperature Class	T6	The surface temperature of the instrument shall not exceed 85 ℃

The meaning of Ex (ia) IIC:

logo content	symbol	meaning
Explosion proof declaration	Ex	Compliant with European explosion-proof standards
Explosion proof method	ia	Adopting Class IA intrinsic safety explosion-proof method, it can be installed in Zone 0
gas category	ⅡC	Permitted to involve Class IIC explosive gases

4. Format description of explosion-proof signs:

Scientifically classify and grade the explosive hazardous media in factories or mining areas according to their ignition energy, low ignition temperature, and the time period of the existence of explosive hazardous gases on site, in order to determine the explosion-proof signs and forms of on-site explosion-proof equipment. Explosion proof mark format: Ex (ia) IIC T4 Explosion proof mark Explosion proof grade Gas group Temperature group Explosion proof grade Description: ia grade: Electrical equipment that cannot ignite explosive gas mixtures under normal operation, one fault, and two faults. During normal operation, the safety factor is 2.0; When there is a malfunction, the safety factor is 1.5; When there are two faults, the safety factor is 1.0. Note: Contact points with sparks must be equipped with explosion-proof enclosures, airtight enclosures, or double the safety factor. IB level: Electrical equipment that cannot ignite explosive gas mixtures during normal operation and a fault. During normal operation, the safety factor is 2.0; When there is a malfunction, the safety factor is 1.5. During normal operation, contacts with sparks must be protected by explosion-proof or airtight enclosures, and there should be measures for fault self display. The safety factor for one fault is 1.0.

IIIExplosion proof blowerClassification criteria for levels

1. Explosion proof grade of motor

The explosion-proof level of a motor consists of three parts: 1) Classification of safety levels for different electrical equipment used in explosive gas areas (Zone 0, Zone 1, Zone 2). The selection of rotary motors is divided into explosion-proof type (code d), positive pressure type (p), increased safety type (e), and non sparking type (n). The classification of explosive gas or vapor mixtures is divided into three types: IIA, IIB, and IIC, which are mainly distinguished according to the large test safety gap (MESG) or small ignition current (MICR). 3) The division of temperature groups for igniting a certain medium. Mainly divided into T1-450 ℃

4Explosion proof blowerClassification of hazardous areas

1. Classification of Hazardous Areas by Level

Zone 0: Explosive materials always or for a long time. Zone 1: Flammable materials may occur or exist during normal operation. Zone 2: Generally, there are no flammable materials present, and even if they occur occasionally, their existence time is short. Explosive area classification, comparison between standards and American standards. I.E.C. N.E.C. gas Zone 0 Class I, Division I　　Zone 1 Class I, Division I　　Zone 2 Class I, Division II　　 Dust Zone 10 Class II, Division I Zone 11 Class II, Division II I.E.C.: Internal Electrotechnical Commission N.E.C.: National Electrical Code, USA

2. Explosion proof classification of electrical components

1. General protection EN50.014 2, oil immersion protection 0 EN50.015 3, pressure protection facilities p EN50.016 4, powder filling q EN50.017 5, flame retardant shell d EN50.018 6, increased safety factor e EN50.019 7, intrinsic safety protection i EN50.0120 8, air tightness protection h not unified 9, pressure flower protection n not unified 10, special measures s not unified

3. Allowable temperature range for electrical equipment

Electrical component temperature zone grade number, component surface temperature maximum allowable value (° C), gas ignition point (° C) C）　　T1 200T450 450　　T2 200T300 300　　T3 135T200 200　　T4 100T135 135　　T5 85T100 100　　T6 T85 85

5Explosion proof blowerExplosion characteristics of several common substances

Name Ignition Point (° C) Temperature Class Explosion Class Group Number Ignition Point (° C) Temperature Class Explosion Class Group Number Acetone 540 T1 IIA Acetylene 305 T2 IIC Acetic Anhydride 330 T2 IIA Benzene 555 T1 IIA Alkyl 365 T2 IIA N-butanol 340 T2 IIA Benzoic Acid 590 T1 IIA Ethanol 425 T2 IIA Acetic Acid 460 T1 IIA Methyl Alcohol 455 T1 IIA Nitrobenzene 430 T1 IIA n-pentane 285 T3 IIA Propane 470 T1 IIA Toluene 535 T1 IIA Hydrogen 560 T1 IIC Hydrogen Sulfide 270 T3 IIB Carbon Disulfide 102 T5 IIC

6、 Power supply limitations for intrinsically safe sensing circuits

Power supply restrictions are mainly reflected in the following three aspects: 1. Isolating power electricity from electronic components. 2. Take measures to prevent external interference electromagnetic fields from coupling into electronic components through relays or current output terminals. 3. The working power supply and voltage of the restricted sensing circuit can be divided into two types of intrinsic safety circuits: ia and IB. Ib intrinsic safety circuits must ensure that the circuit components do not explode under the working state of the party and when there is a fault in the system. The Ia intrinsic safety circuit requires that the components do not explode under normal operating conditions and in the presence of two faults.

7、 The main explosion-proof standards followed by EH instruments

1. IEC/CENELEC/EUrOPE and North America/FM standards are frequently used, while CANADA/CSA standards are almost not used in China. Example: CENELEC: Eex de/Eex d ib IIC T2-T6　　FM: NI/I/Z/ABCD DIP/II, III/1/EFG　　XP/I/1/ABCD DIP/II, III/1/EFG　　CSA: Class I, Div 2, ABCD　　2、 The new European explosion-proof standard ATEX100a will replace the original CENELEC standard (as of 2003) ATEX 100a： II IG Eex ia IIB T6　　I II 1G Zone 0 1D, 2D,3D dust explosion　　Mining other 2G Zone 1　　Industry industry 3G Zone 2

8、 Classification of Protection Levels for Instrument Enclosures

As an instrument used in explosive hazardous areas, the protection level of its casing should also be specified and assigned a certain code, namely an IP rating number. The shell protection level specified in IEC144 is represented by a code corresponding to its resistance to external object impact and puncture, as well as its waterproof ability. For example, the measurement circuit board of intrinsically safe instruments should not be removed from its housing, otherwise it will violate the low requirements of IP40. The protection level consists of two digits, preceded by the word IP. IP1 2 * digit second digit Anti external object sprint ability Waterproof ability 0 No impact resistance 0 No waterproof penetration ability 1 External object size greater than 50mm (extra large) 1 Water self drops 2 External object size greater than 12mm (medium) 2 Water droplet entry angle is -15 ° 3 External object size greater than 2.5mm (small) 3 Water sprays 4 particles of external objects at a 60 ° angle, particle size greater than 1mm 4 Hazardous dust sprayed from all directions 5 50 liters/minute water beam 6 Penetrating dust (only applicable to special shells) 6 100 liters/minute water beam 7 Immerse in water at a speed of 1 meter/minute 8 Immerse in water in a pre agreed manner;

Precautions for installation of explosion-proof blower:

A. Installation site

The surrounding temperature and humidity should meet the following conditions:

Single phase -5~40 ℃ Three phase -10~40 ℃

Choose a place with good ventilation, less dust and moisture.

Explosion proof high-pressure air pump installed outdoors, please use a rain cover.

Preparation for start-up and precautions before start-up: Before start-up, the following checks and confirmations must be carried out during trial operation after installation and alignment Attention should be paid to the following matters and handled with caution.

In addition. Necessary training should be provided to the relevant operators in advance to enable them to handle sudden situations when the fan starts operating Be able to quickly make corresponding and correct actions according to the instructions of the operation commander!

It is an honor to recommend one of our company's key products, explosion-proof blower, explosion-proof vortex air pump, gas conveying explosion-proof fan, dust conveying explosion-proof fan, with a three-month quality problem replacement and a 15 month warranty service.