Clean Room Air Filter

Air Filter: The Complete Guide

There are primary filters, sub-high efficiency, high efficiency filters, and super high efficiency filters. Various models have different standards and use efficiency.

Zonsteel clean room air filter models:

Plate air filter

Bag air filter

W type air filter

Tank type hepa without partition

High efficiency filter without partition

High efficiency filter with clapboard,

Ultra high efficiency filter

High temperature resistant filter

Most Zonsteel clean room air filters are aluminum frame, and fiberglass filter element. While high temperature resistant filter is special, frame SS304, filter element high-efficiency fiberglass, can resist fire 250°C, 280°C or 350°C.

Another special one is tank type hepa without partition, it’s sealed by liquid, is leak-proof and is usually used in pharmaceutical Industry.

Last special one is ultra-high efficiency filter which can handle all particles bigger than 0.1um.

Advise clean room air filter end-use temperature between 5-63°C. And during transportation or when to use it, air filter must be parallel to horizontal Plane. The best stock temperature is 23°C, no less than -15°C.

Zonsteel clean room air filter delivery time is 15 days, well packed in wooden case.

Contact us today to customize your clean room air filter.

Clean Room Air Filter: The Ultimate FAQ Guide

As part of designing a clean room, there is the need to consider the air filtration system. It is why you would want the best clean room air filter set up in a clean room.

If it is done properly, then the clean room would be able to maintain its integrity.

This guide is all about learning more about the clean room air filter and how best to use one for your clean room. Let us get into the guide already.

What Is a Clean Room Air Filter?

Figure 1: High Efficiency Clear Room Air Filter

The clean room air filter is a device meant to trap dust, dirt, and other particulates to keep them from getting into the clean room.

The filter would also purify the air further to ensure that the air that enters in the clean room meets its requirements.

Depending on the clean room requirements, you are likely to come across different types of clean room air filters in the market.

The most common classifications would be primary filters, medium efficiency filters, high efficiency filters, sub-high efficiency filters, and ulpa filter.

With the many clean room air filter options in the market, it can get confusing sometimes.

We recommend that you talk to us for more information so that you can pick the right clean room air filter for your needs.

What Are the Standard Clean Room Air Filter Classifications and Their Characteristics?

Figure 2: Primary and Medium Efficiency Filter

We will look at the common standard clean room air filter classification to help you understand what the filters are all about.

✧ Primary Efficiency Filter

This type of clean room air filter is good for removing dust particles ≥5μm and its initial resistance is ≤50Pa.

You will find it mostly being used as a clean room pre-filter in air conditioning systems.

The idea is to trap as much dust particles as possible so that it does not get to the medium and high efficiency clean room air filters. This will largely extend the service life of the other types of filters.

✧ Medium Efficiency Filter

After the primary efficiency filter, next in line is the medium efficiency clean room air filter. The filter is designed to remove dust particles of size ≥1μm and its initial resistance is ≤80Pa.

This filter will also be used in the air conditioning system to further reduce the load on the high efficiency clean room air filter.

It will then prolong the service life of the high efficiency filter and other important air-conditioning box accessories.

✧  Sub-High Efficiency Filter

Another type is the sub-high efficiency filter that you can use as a clean room air filter. This type of filter is good for removing dust particles of up to ≥0.5μm and the initial resistance ≤120Pa.

This is also a good choice as an intermediate filter in the air conditioning system. It can still be used as the terminal filter in a low-level purification system.

✧  High Efficiency Filter

This type of clean room air filter will remove dust particles of size ≥0.3μm and its initial resistance ≤220Pa.

In most cases, this will be the terminal filter in a clean room. The terminal filter means that it would be the last one to filter the air before it gets released into the clean room.

Because of its performance, it can help the clean room maintain its integrity even better.

✧  Ultra-High Efficiency Filter (Ulpa Filter)

 

Figure 3: Ultra-High Efficiency Clean Room Air Filter (Ulpa Filter)

For this type, it can remove dust parts of size ≥0.1μm and its initial resistance is ≤280Pa.

It is also a terminal clean room air filter in air conditioning systems.

It would be used in a clean room where the air purification has to meet very strict guidelines.

What Is a Junior High-Efficiency Air Filter? And What Are the Common Classifications of The Same?

The junior high efficiency clean room air filter would mostly be used in the general ventilation air conditioning system.

Its main aim would be to protect the rear-stage filter and the surface cooler heating coil from cases of blockage.

The result is that the filter would increase the service life of these other parts in the air conditioning system.

Below are the common classifications of the junior high efficiency clean room air filter you can buy at Zonsteel. The classification is majorly based on the structural differences between the filters. Let us check them out.

✧  Plate Clean Room Air Filter

Figure 4: Plate Clean Room Air Filter

The plate clean room air filter has a compact structure. As such, it will be small and lightweight. Setting it up should not be a problem when it comes with such characteristics.

As for maintenance, this clean room air filter is easy to purge and disassemble in case you want to do more maintenance.

Looking at is performance, we find that it can filter dust particles of size ≥5μm in the air conditioning system. This will then protect the medium efficiency filter and extend its service life even better.

The filter is also characterized for having a large effective filtration area. This means that its dust holding capacity is also large and the service life is better.

Since it also has a firm and stable structure, it should be able to handle more abuse compared to some other filters.

✧  Bag Type Clean Room Air Filter

Figure 5: Bag Type Clean Room Air Filter

Another type of clean room air filter you are likely to come across is the bag type air filter. This filter is good for filtering dust particles of size ≥1μm in the AC system. Its work is to protect the high efficiency filters in the system.

Looking at its structure, you will find that it has a partition grid in the bag to increase the filter area of the bag.

It is why you would find it commonly being used as the intermediate filter for the clean room air supply.

It is still common in other sectors such as semiconductor electronics, food industries, chemical textile, pharmaceutical, and more.

This type of filter also comes with good air permeability. As such, you would get more air passing, but most of the dust particles are trapped. Its compact structure makes it easy to install this clean room air filter.

✧  W-Type Clean Room Air Filter

Figure 6: W-Type Clean Room Air Filter

Because of its design, the W-type clean room air filter significantly increases its filtering area. It also reduces the overall structural resistance of the filter.

This W-type clean room air filter is also liked for having a large air volume, long service life, and low resistance. These are all important characteristics you need for better air filtration in a clean room.

Because of its features, it is mainly used for medium efficiency, sub-high efficiency, and high efficiency filtration. It all comes down to what the customer wants in terms of a clean room air filtration.

How Do You Pick the Best Junior High Efficiency Clean Room Air Filter?

 

Figure 7: Clean Room Air Filter Manufacturing

Now that you know the different types of junior high efficiency clean room air filters, what would you consider when choosing them for your clean room applications? Below are important considerations to always have in your mind to end up with the best clean room air filter.

✧  You need to consider the inlet and outlet diameter of your junior high efficiency clean room air filter. We recommend that the inlet and outlet diameters of the filter should not be smaller compared to the inlet diameter of the matching pump. In most cases, the diameter would be the same as the inlet pipe diameter.

✧  Look at the normal pressure that the clean room air filter can handle. This will be the highest pressure that the clean room air filter would be able to handle. The pressure specification will be among the filter specifications to help you know if it will be suitable for your application.

✧  Select the junior high efficiency clean room air filter based on the number of holes. The number of holes will determine the particle size of the impurities that would be trapped in the medium. Look at the filter specifications to see what is the size of dust particles that the junior high efficiency clean room air filter can trap.

✧  The filter material is also important to keep in mind when choosing the best clean room air filter. The material needs to offer you the best service life while at the same time filtering the dust particles better.

✧  Another important consideration is the filter resistance loss calculation. The resistance is measured in terms of pascals. Look at this flow rate in the product specifications to see if it would match to your clean room design requirements.

If you still have questions about choosing the best clean room air filter, Zonsteel can help you learn more about them before you can choose the right one for your clean room.

What Should You Consider When Choosing Primary, Medium, and High-Efficiency Clean Room Air Filters?

Figure 8: High Efficiency  Clean Room Air Filter without Partition

The chances are that you are likely to come across the clean room air filter being categorized as primary, medium, or high-efficiency. If you are new to such filters, you might not know how to choose them correctly.

We recommend that you keep the following clean room air filter features in mind before making up your mind.

✧  The air filtration speed

✧  The air filter resistance

✧  The air filtration efficiency

✧  The dust holding capacity of the clean room air filter

When you have all the information mentioned above, then it would be easier to get the correct clean room air filter. Here is how the factors mentioned above can affect the choice of a clean room air.

✧  Look for a filter with a large filtering area. Keep in mind that if the filter has a larger filtration area, then it is likely to have a lower filtration rate and smaller filtration resistance. This will mostly be used as the primary filter.

✧  Look at the efficiency of the clean room air filter at different levels of the air conditioning system. When designing this system, you need to know the filtration requirements at different stages. It is from the design that you would know which section needs the primary, medium, or the high efficiency clean room air filter.

✧  The resistance of the filter needs to be monitored more often. This will depend on the filter material and the quality of air it has to process. Then the resistance of the clean room air filter goes beyond a certain value, then the filter is scrapped as it is no longer efficient. Having excessive resistance might cause secondary pollution and thus the need to replace such a filter.

✧  You also have to look at the dust holding capacity of the clean room air filter. This will often determine its service life. There is no doubt you would want a clean room air filter with the best dust holding capacity.

What Is the Production Process and Quality Control Checks of a High Efficiency Clean Room Air Filter?

Figure 9: Efficiency Clean Room Air Filter Production Process

A high efficiency filter is mostly used in collecting dust particulate of size below 0.3μm. It is why you will find it being a terminal air filter in most systems.

Once the other types of filters have trapped most of the dust particles, then it can be the last one to handle the air for the final stage.

Because of hepa filter clean room design, this type of hepa will be used in dust-free purification workshops, clean rooms, precision instrument factories, and many others that need a high level of air purification.

So, what is the production process like? Here is a quick overview of the production process for the high efficiency clean room air filter.

✧  Testing the raw materials to see if they meet the quality needs of Zonsteel

✧  What follows is the importation of the filter paper origami important for making the air filter

✧  Then, we proceed to the assembly part of the hepa.

✧  To complete the process, a sealant gel is poured to hold the different parts together

✧  At this point, the hepa undergoes various in-house tests to ensure that it is working correctly as expected

✧  When the quality assurance team certifies that the hepa is good, then it would be shipped to the customer or available for sale.

What Are the Classifications of High Efficiency Filters Based on Their Structural Form?

Here are the common options you would get as the high efficiency filters from Zonsteel.

✧  Liquid Seal Type Hepa Filter (Panel Type)

 

Figure 10: Liquid Seal Type Hepa Filter (Panel Type)

This type of clean room filter will have an insulation seal important for improving the reliability of the filter. As such, this type of filter would be suitable for PAO dust detection in a clean room.

Because of its filtering capability, it will be a terminal filter in a clean room or any other related industry. It also comes with two HEPA filters, side sealing, and top sealing.

On overall, it should be able to handle many microorganisms and small dust particles in the air.

✧  Uwgb Super-Efficient without Partition

When the other model above was using liquid sealant, this one uses a high temperature resistant PU seal. It also comes with aluminum profile as the frame material to make it even stronger.

For its construction and design, this clean room air filter is commonly used for clean rooms and other purification systems that need the best air cleanliness.

✧  High Efficiency Filter with Partition

 

Figure 11: High Efficiency Filter with Partition

This high efficiency clean room air filter comes with a different design meant to make it better. It uses the PU seal or PU foam seal to keep it together. Its filter paper is made of fiberglass and since it has a partition, the spacer is aluminum foil.

You will find this high-efficiency filter common in clean rooms and other purification systems that need a high level of air cleanliness.

✧  High Temperature Hepa Filter

Figure 12: High Temperature Hepa Filter 

This clean room air filter comes with a different design and construction that makes it resistant to high temperatures. Depending on the model that you pick, it can be resistant to temperature from 250 degrees C to 350 degrees C.

It is why this HEPA filter would be common in systems handling high temperature air purification. You Will Find It In Tunnel Ovens And The Ultra-Clean Ovens.

✧  Antibacterial High Efficiency Filter without Clapboard

Depending on how the high efficiency filter is designed and built, sometimes it can lead to microorganisms colonizing and multiplying in the ducts. That is not something you need when there is the need for the best air quality in the clean room.

It is why we now have an antibacterial high efficiency filter. It will help eliminate the chances of having microorganisms living in your air purification system. As such, you will always end up with a clean air supply.

From the various filter options mentioned above, we find that you can get the best clean room air filter depending on your needs. Where you have more questions, Zonsteel staff is here to help you learn more.

How Can You Make the Service Life of The High Efficiency Clean Room Air Filter Better?

Figure 13: Clean Room Air Filter

No one wants to keep on changing their high efficiency clean room air filter more often. This is because it can be expensive and an inconvenience for some. So, we will look at the possible ways of extending the life of your high efficiency clean room air filter.

The first thing you have to do is to have a pre-filter or a primary filter in the air conditioning system. The work of the pre filter is to remove as much dust and dirt as possible. It will further protect the medium filter before the air can get to the high efficiency filter.

If you can care for your high efficiency filter, then it would be able to have a service life of 5 years or more. There are those who can stretch it to 10 years depending on the care.

What you might have to replace mostly would be the primary filter. This is because it would be the one that catches all the dirt and dust. With a good primary filter in place, it can reduce the resistance load and save you a lot on electricity bills.

Where you get to use the high efficiency filter can also determine its durability. Take an example of where you use it in a workshop that has fumes of hydrofluoric acid. When this air gets to the high efficiency clean room air filer, then its fiberglass filter paper gets corroded. To ensure that there is better safety, then the high efficiency filter would need replacing more regularly.

It is common to find that pharmaceutical companies would replace their high efficiency filters after a rainy season to prevent the possible cases of mold contamination.

As for the biological labs, they would also change the high efficiency filters to ensure better reliability before starting on a new project.

What Are the Common Testing Methods Used for High-Efficiency Filters?

Testing of your high efficiency clean room air filter more often is recommended. This is because it will help you to know if the filter is working correctly as you want or not. Below are some of the common methods used for testing high efficiency filters.

✧  Sodium Flame Method

The use of sodium salt for testing the high efficiency filters has been around for years now. It is still one of the most reliable ways of testing the clean room air filter.

The method works by testing the dust source with sodium chloride salt fog. The results are based on the brightness quantity of the hydrogen flame when buying the salt fog.

This method will also be used in combination with a flame photometer to correctly detect the brightness of the flame.

It is worth noting that this method will only detect low sensitivity and cannot be used for the ultra-high efficiency filters.

✧  Dop Method.

DOP in full means monodisperse dioctyl phthalate droplets. This method was first introduced in the USA, but it is now popular in different countries around the world.

It works by measuring the degree of turbidity of the air containing the DOP introduced into the ducts. The testing team will also use a scattering photometer and compare the results to the relevant standards of the method.

✧  Mpps Method

Figure 14: Mpps Method Test Clean Room Air Filter

This method is common in Europe and the US to test the ultra-high efficiency clean room air filters. With its impressive outcomes, it is now becoming a mainstream method for testing the clean room air filters.

The method includes using a large flow laser particle counter and a condensation nucleus counter. These two will inspect the entire air outlet surface and give an outcome for the dust particles for each of the points.

It is from this data that the testing team would know if the clean room air filter is good or needs replacing.

A great clean room air filter will make your clean room to maintain its integrity for longer. As such, we are here to help you achieve that.

What Are the Fan Powered HEPA Filter?

Figure 15: Fan Filter Unit FFU Has HEPA Filter

HEPA filter can work wit fan, when the two are integrated to a unit, it called FFU. FFU is widely used

In areas of electronics, food and beverage, pharmaceuticals, cosmetics and medical instruments etc.

HEPA filter also work with exhaust fan. To exhaust hazardous air or polluted air.

Conclusion

Zonsteel has been making these clean room air filters or called clean room air purifier for over two decades now. With all that experience, we can always help you get the best clean room air filter. In case you have more questions on clean room air filters, get in touch with us and we will gladly help you out.