• YB Series Explosion-proof Three-phase Induction Motor

Explosion Proof Motor

Explosion Proof Motors produced by Hordu has a strong ability for explosion proof Industry, easy to machine, reasonable price.

As a professional explosion proof electric motor manufacturer, Hordu has a wide ac explosion-proof electric motor stock.


Hordu Explosion-proof motors are nonsparking during operation and are often used inflammable and explosive industrial environments such as coal, oil and gas, petrochemical and chemical industries.

Also, this motor is widely used in textile, metallurgy, city gas, transportation, grain and oil processing, paper, medicine, and other departments.

Hordu Explosion proof motors fulfill the current European ATEX guidelines and GB18613 and GB3836.

Our explosion proof motors are typically used as the main power equipment and are commonly used to drive pumps, fans, compressors, and other transmission machinery.

Chemical Industry

Oil & Gas Industry

Forest Products Industry

Water & Waste Water Industry

Explosive atmosphere environments





Gear Reducers

Packaging Details: Strong cartons with foams inside, or plywood case

Delivery Detail: 15-30 working days after payment

packing and shipping

Hordu Industry Motor: The Complete Guide

Hordu explosion proof motor explosion-has proof marks as Ex dI、Ex dIIAT4、Ex dIIBT4, all of which Exdl is suitable for coal mine face environment with methane or coal dust explosive gas mixture. Exd II AT4 and Exd IIBT4 are suitable for factory use class A and Class B. The temperature group is the environment in which the explosive gas mixture of the T1, T2, T3, and T4 groups exists.

Hordu explosion proof motors have a highly developed structure and are available from 200V-690V low, medium, and high voltage. This brings our users enormous energy saving.

Hordu explosion-proof motors are available in installation types of IM B3, IM B35, and IM V1.

They comply 100% with IEC797-7 standards. Our explosion proof motors are made of robust die-cast iron.

It guarantees good impact resistance and excellent heat dissipation while reducing costs.

Hordu explosion proof motors in cooling types IC 411 in accordance with EN 50018 in protection class IP55, higher protection classes are available for the extremely harsh environment, at the rated voltage and frequency.

If you got any questions regarding our explosion proof motor and Hordu pre-sales and after-sales services, please use our inquiry form or directly contact us any time.

We believe that you will be very satisfied with the quality and price of our products.

Explosion Proof Motor: The Complete FAQ Guide

Hordu makes different types of motors with various applications.

Today, the focus is on the explosion-proof motor.

This is a popular motor you can use for different applications that need heavy-duty motors.

Well, we get into the detail of what an explosion-proof motor is all about below.

What is an Explosion Proof Motor?


An Example of Explosion Proof Motor

Figure 1 An Example of Explosion Proof Motor


Explosion-proof motors are great motors for industrial applications where there are pervasive or highly combustible materials.

When you see the term explosion-proof, it does not mean the motor will not explode under any circumstance.

However, it means that it prevents internal motor explosion even when exposed to elements that might be highly combustible.

What Can Make a Motor Explode?

A motor can explode under two scenarios.

The first one is when the motor surface becomes so hot during an operation that it ignites the vapor, gas, or dust around it.

The second scenario is when a single arc from the motor malfunctions. It can be a power supply issue or a winding insulation failure leading to the ambient material’s ignition.

That is why Hordu came up with the explosion-proof motor to handle different working conditions. The next time you get one, you are sure it will live up to your needs for an explosion-proof motor.

What are the Features of the Explosion Proof Motors?

An Assembled Explosion Proof Motor with gearbox

Figure 2 An Assembled Explosion Proof Motor with gearbox

The Hordu explosion-proof motors are among the best in the market as they meet the various standards laid out for an explosion-proof motor.

Such include EX dl, Ex dllAT4, and EX dllBT4 standards. As such, these motors can work in different tough conditions without exploding.

The explosion-proof motors have a highly developed structure for handling different voltage ranges.

The motors can handle voltages from 200V to 690V. As such, they will be ideal options for those who want motors for low, medium, and high voltage applications.

The explosion-proof motors are also available in different installation styles.

The most common include IM B3, IM B35, and IM V1. It is easy to see how versatile motors are to own today.

The use of die-cast iron material to make the motors improve their durability. Considering you would be using them in some harsh environments, any buyer wants a durable motor.

These motors are also impact-resistant and good at heat dissipation. For a motor to work effectively, it needs to work within its rated temperature. Since the motors are good at heat dissipation, you should no longer worry about them failing any time soon.

How do I Know if my Motor is Explosion Proof?

A Nameplate Showing the Certifications of a Motor

Figure 3 A Nameplate Showing the Certifications of a Motor

A motor earns the name explosion proof if it can contain an internal explosion without falling apart or rupturing thus putting the entire facility at risk. To understand if the motor is explosion proof, consider looking at the nameplate.

Any manufacturer will gladly indicate if the motor is explosion proof on the nameplate. Keep in mind that there are different classes of a motor being explosion proof. So, make sure you understand them all before buying. Below are a few of them to help you learn more about explosion-proof motors.

Class I, Division 1

The class 1 locations are those with combustible concentrations of gases present. Division 1, on the other hand, is presumed to have flammable materials even during normal operations.

Such explosion-proof motors would operate on the assumption that gas or vapor can permeate the closure. So, the Hordu has to keep the motor from experiencing a single malfunction because of such penetration.

These motors would generally have the strictest explosion-proof performance than the other classes.

Class I, Division 2

The division 2 locations will contain combustible elements such as ambient gas or vapor only when a piece of equipment fails. As you can see, during the normal equipment operation, there will be no vapor or gas present.

The division 2 specifications will still be strict, but not the same as those for division 1.

The primary consideration for this division of motors is that the surface temperature remains below the point of auto-ignition for the vapor or gas.

Class Groups

Another thing you will notice about explosion-proof motors is the class groups depending on the environment’s materials. Here are the groups and their respective material protection.

Group C: diethyl ether, isoprene, cyclopropane, acetaldehyde

Group D: acetone, butane, benzene, ammonia, gasoline, methane, ethane, ethanol, propane, styrene

Group F: Coal

Group G: Corn, nylon, sugar, wheat, polyethylene, wheat flour

Do not worry so much about the different classes and divisions. Hordu customer care team will help you understand them better and pick the correct explosion-proof motor depending on your needs.


ATEX is an abbreviation for atmospheres explosibles. This standard is responsible for certifying that the equipment or protective system is intended for use in atmospheres with potential explosives. An atmosphere can have explosives for various reasons such as flammable gases, vapors, mists, and combustible dust.

Manufacturers have to ensure the equipment is compliant with the ATEX standards before selling the explosion proof motors in the European Union.

Still under ATEX, there are several suffixes you can get on an ATEX code. For the Hordu explosion proof motors, they have the codes EXD IID T4 Gb and EXD IIB T4 Gb. You might be wondering what such letters mean. Here is a quick breakdown.

EX – indicates explosion protection

Exd – it means the motor is flameproof. This is because it can contain the flame without allowing it to escape right into a hazardous atmosphere.

IIB – the motor is meant for non-conductive dusts

T4 – this is the temperature class rating. It indicates the maximum surface temperature of the explosion proof motor

Gb – this indicates the equipment protection level for gas


Hordu explosion proof motors also conforms to the European IEC standards other than the China National Standards. Some of the IEC standards that the motors are approved under include IEC/EN 60079-0 ( the equipment conforms to general requirements) and the IEC/EN 60079-1 (shows that the equipment has flameproof enclosures?.

How can the Explosion Proof Motor be Used?


Installed Explosion Proof Motors at a Factory

Figure 4 Installed Explosion Proof Motors at a Factory


Some might be wondering, when do you need an explosion-proof motor?

Well, Hordu recommends that you use them if you work in the following industries;

  • Waste and wastewater industry
  • Oil and gas industry
  • Chemical industry
  • Forest products industry
  • Explosive atmosphere environment

Such explosion-proof motors would mostly be used to run pumps, conveyors, compressors, gear reducers, fans, and more.

If you think you have a specialized use for the explosion-proof motor, let Hordu help you pick the right one.

What are the Common Maintenance Tips for Explosion Proof Motors?


Technicians Working on an Explosion Proof Motor

Figure 5 Technicians Working on an Explosion Proof Motor


Explosion-proof motors are designed with durability in mind.

Even if they are durable, they still need the best maintenance to keep them working properly over the years.

The maintenance can be categorized into three major options. They include preventative motor maintenance, predictive motor maintenance, and reactive motor maintenance.

Preventive Explosion Proof  Motor Maintenance


For this type of maintenance, the user will help prevent the motor from failing prematurely and keep it operating reliably. It is a calendar-based type of maintenance. This is where a manufacturer tells you what you should do after a certain period.

You can achieve this maintenance by doing the following;

  • Visually inspect the motor. Mostly looking for burn marks or burned odor from the motor overheating
  • Check the bearings for signs of vibrations and noise
  • Perform a motor winding test
  • Always grease the bearings to provide better lubrication
  • Look at the starter switch, fuses, and connections. Make sure they are all tightened properly
  • Record the inspects, repairs, or replacements done on the motor for future reference

Predictive Explosion Proof  Motor Maintenance


For this type of explosion-proof motor maintenance, you identify a problem at the right time and take steps to mend it.

The results are that you decrease the chances of the motor failing completely, leaving you with a lot of down times.

This maintenance type will also save you on labor and parts costs as everything is sorted before it becomes severe.

Some of the checks you have to do under this section include vibration analysis, infrared thermal imaging, and more.

Reactive Explosion Proof Motor Maintenance


For this type of motor maintenance, the user will run the motor until it breaks. As much as it might be low cost for some people, you might have to replace it when the motor breaks. That is when it becomes even more expensive.

Also, you would not know when it will breakdown. You might end up with unplanned downtimes that make it hard to handle work on your projects.

Each operator needs to find a balance between these three maintenance modes for the explosion-proof motors.

Hordu insists on following its maintenance schedule so that the motor remains in good working condition for years to come.

How to Buy Explosion Proof Motors in China?


Yes. Hordu is a top brand in making the best explosion-proof motors in China.

The best part is that they are affordable. As such, you will end up with the best value for the money.

If you want to buy an explosion-proof motor in China, get in touch with the Hordu customer care team for more information and the purchase process.

The team will also guide you on any technical questions that you might have in mind.

Also, you can get the Hordu explosion proof motors overseas. Yes, the company can ship the explosion-proof motors to different parts of the world.

Installation can also be done upon request. This is to ensure the clients get the motors wherever they are.

The packaging is done correctly to ensure better protection of the explosion-proof motor.

This can include the use of foam to minimize any impact damage to the motor.

Simply make sure that you point out where the motor needs to be delivered so that the company can make the necessary arrangements.

What is the Difference Between Explosion Proof Motors and Other Types of Motor Enclosures?



Explosion-proof motors (XPRF) are popular right now, thanks to their performance.

They are designed to withstand an internal explosion of vapor or gas completely.

This should keep the motor frame from rapture or bursting. As such, it is a nice choice for hazardous environments.

That is not the only enclosure you can get with motors. Here are some for comparison.

  • Open drip-proof (ODF) motorswill have open enclosures, as the name suggests. This feature makes them suitable for indoor and clean atmosphere applications only. The ventilator openings are also part of the construction to prevent solids and liquids from getting into the motor housing.
  • Totally enclosed fan cooled (TEFC) motors. It is common to find people comparing the explosion-proof motors to these motors. The difference between the two is that the TEFC motors have an external fan important for circulating air outside the motor to cool it.
  • Washdown (WDN) enclosures– if you need a motor in an environment with regular cleaning and sanitizing, then go for those with washdown enclosures.
  • Totally enclosed non-vented (TENV) motors– these motors do not have a fan for circulating air in and out of the enclosure. However, their design does not make them air or liquid-tight, meaning there is still a chance of air and liquid getting into the motor housing.

Why Should You Be Looking at an Explosion Proof Motor Nameplate?

A Nameplate Showing the Features of a Motor

Figure 6 A Nameplate Showing the Features of a Motor

The explosion-proof motor nameplate is essential to help the user learn more about the motor and where best to use it.

A nameplate will have information such as the voltage and amps, the speed of operation in RPM, the class insulation depending on various industry standards, efficiency, motor design, and more.

There is no doubt it stands out as an important factor everyone should consider when picking the best explosion-proof motor.

If you do not know how to interpret an explosion-proof motor nameplate, you need the Hordu customer care team’s services. The team is highly trained on the various products the company makes to help you get the right explosion-proof motor for the job.

Why is it Important to Balance the Explosion Proof Motor During Installation?


Like other motors, the explosion-proof motors will also work great only if they are balanced.

The unbalanced motors are likely to lead to more vibrations that can wear the motor prematurely. So, follow the manufacturer’s instructions in making sure the motor is correctly balanced before using it in different applications.

If it seems hard to achieve the correct balance, consider hiring a professional to get the job done.

What is the IP Rating of an Explosion Proof Motor?


The IP rating determines how good the motor is at dealing with dust and liquid penetration.

The explosion-proof motor from Hordu has a protection class of IP55 or IP 65 for IIB and IP56 or IP66 for IIC. This makes it a good choice for using the explosion-proof motor in tough environments while, at the same time, maintain its performance.

What Should You Keep in Mind When Choosing an Explosion Proof Motor?


Maybe so far, the explosion-proof motor is ticking all the right boxes for the application you have in mind.

Now comes the exciting part;

how do you choose the right explosion-proof motor?

Here are some quick tips to guide you to pick the right motor.

  • Look at the motor classification

Explosion-proof motor classifications have been highlighted above in this guide. Always look at the classification from the nameplate to decide if the motor is good for the application or not.

Hordu gives you all the important information in a datasheet too. The aim is to help you understand more about the classification before making up your mind about motor suitability.

  • The power output

Like any other type of motor, you always have to consider the power output of the explosion-proof motor. This will largely determine how and where best to use the motor.

As a rule of thumb, you should never overload the motor. This will make it wear prematurely, and you will have to spend more money to get a new motor. So, understand your load needs first before choosing the motor based on its power output.

  • Ease of installation

Motors often have similar installation procedures. However, some might need fine-tuning to have them working properly. So, the model that you choose should generally be easy to install. This will make it easier for you to have an easy time using the motor once it is delivered from the manufacturer.

Hordu will provide you with any special installation procedures to follow where necessary. Well, always consider using the services of a professional when installing your explosion-proof motor.

  • Durability and maintenance

When buying an explosion-proof motor, you do not expect to start repairing it after a few months of using the motor. A motor’s durability and maintenance needs will always be a significant consideration for anyone new to such machines.

Even if the motor needs maintenance, it should not be too much that it affects your job. Regular maintenance within the stipulated timeframe should not be a problem for most people.

  • Delivery time

Of course, you will be buying an explosion-proof motor because you need to set it up as soon as possible. So, the delivery time is also essential.

A company like Hordu can make the delivery in 15 to 30 days once you make the payment.

It should be within the time frame for most people who want an explosion-proof motor.

  • Packaging

All the explosion-proof motors from Hordu are packaged properly because of shipping and transportation logistics. The company uses strong cartons with foams in the interior for cushioning the motor from impact. There is also the use of plywood cases if the motor has to be transported over a long distance.

Explosion Proof Motors vs. Flameproof Motors; Which is Better?


An Example of a Fire-Proof Motor

Figure 7 An Example of a Fire-Proof Motor

The explosion-proof motors and flame-proof motors are mostly reserved for hazardous environments. Whenever you use the standard motors in such areas, they might not hold up very well. They are also likely to explode, which is something you do not want.

Now that you know these two are great motors for hazardous environments, it is then good to learn the difference between them.

  • Flame-proof Motors

The flame-proof motors have flares, sparks, and additional internal ignition elements that allow them to operate in environments with explosive materials.

The IEC 60079-1 standard is used for certifying this type of motor. Once the motor is certified, it means that it has a flame-proof enclosure.

The flame-proof motors are commonly used in applications containing gas, vapor, dust, or other related flammable materials that could ignite accidentally.

The last thing you want is to use an improper motor in a hazardous environment. The damage can be from minor injures to severe damage to the facility just because you use the wrong motor for the environment.

  • Explosion-proof motors

The explosion-proof motors will have a special enclosure to prevent the internal elements from igniting when interacting with the flammable external material. Even if the explosion occurs, they have to be contained in the motor housing.

The major difference between explosion-proof motors and flame-proof motors is the agencies that regulate these motors.

Here is a summary of the key differences

  • The explosion-proof motors need to go through more intense testing than the flame-proof motors
  • The explosion-proof motors will also be more heavily constructed than the flame-proof motors
  • The flame-proof motors will often require specialized tools to open them for repairs
  • The explosion-proof motors can be drilled safely in the field. Well, that is not the same for flame-proof motors.

Even with the subtle differences between these two motor types, they are both great for hazardous environments.

Just make sure you understand which model you are getting for yourself.



Explosion-proof motors are quite revolutionary if you think about it.

They can work great in a hazardous environment without a problem. It is why those working in such environments would not have any problem investing in them.

Do not worry if you are new to explosion-proof motors. The guide above has all the information you need. In case you have more questions, get in touch with Hordu to get all the answers about explosion-proof motors.