Nitrogen Filter

Filson: Your Premier Nitrogen Filter Choice In China

Filson nitrogen filters are applied to compressed air like nitrogen gas and other non-corrosive gases. They are essential separation and purification equipment components used in nitrogen gas gathering stations, compressor stations, distribution stations and other applications.

To meet the varying needs of applications, Filson can offer a wide range of nitrogen filter. For example: nitrogen air filter, liquid nitrogen filter, high pressure nitrogen filter, nitrogen filter cartridge and replacement nitrogen filter.

The main function of Filson nitrogen filters is to eliminate dirt, dust, rust, condensate, moisture content, exhaust fumes and oil impurities in the process to ensurer the safe operation and keep clean environment of nitrogen air and nitrogen equipment

Filson Nitrogen Filter

Nitrogen Air Filter
Filson nitrogen air coalescing filters are an important part of nitrogen air treatment system. And they need to be changed regularly to ensure the quality of your nitrogen gas is what you expect.
Liquid Nitrogen Filter
Filson liquid nitrogen filter is a purifier designed to purify liquid nitrogen upstream of a storage unit. The adsorption technology employed is used to reduce impurities such as CO, O2, H2 down to ppb level.
High Pressure Nitrogen Filter
Filson high pressure nitrogen filter adopts high-precision manufacturing technology to meet the requirements of the high-pressure field.
Replacement Nitrogen Filter
Filson can also manufacture some leading brands of replacement nitrogen gas filter, such as Parker nitrogen filter, Balston nitrogen filter and so on.
Nitrogen Filter Cartridge
Filson nitrogen filter cartridge are available in different materials such as stainless steel, sintered powder. Its filtration rating ranges from 0.2 micron to 150 micron.

Why choose Filson Nitrogen Filter


In the nitrogen gas generation and transportation process, purifying the nitrogen air is significant to keep it clean. It is hard to find a reliable nitrogen filter supplier, then, you are in right place, Filson can offer one-stop solutions on nitrogen filter fabrication for OEM customers.

Filson nitrogen filters are available in different materials, dimensions, filtration ratings, sealing material and more according to your final application. In a word, we can customize your nitrogen filter, as well as a guaranteed low price.

Filson is committed to providing unmatched technical support of nitrogen filter to all our customers. Our professional application engineers provide immediate response to technical questions and requests for specifications and quotes whenever possible.

Filson Nitrogen Filter catalog

Filson: Your Leading Nitrogen Filter Manufacturer

Filson is a reliable nitrogen filter manufacturer in China, our engineering experts will help you select the best model for your nitrogen purification filter needs.

1inch 2inch NPT High pressure N2 Gas Filter

Filson premium nitrogen filters are needed to keep your nitrogen generator operating correctly. The design of your nitrogen filter is optimized to allow the nitrogen air to have the lowest possible pressure resistance.

The presence of pollutants in the compressed air, such as oil, water, and scale, can cause problems with the internal CMS and solenoid valves. The purpose of installing Filson nitrogen filter is to obtain a clean nitrogen gas after the sterile filtration process, and a high flow velocity in the processing line.

Filson Nitrogen Filter Cartridge

One type of the Filson nitrogen filter is activated carbon filter. The particulates like aerosols are normally eliminated by the activated carbon filter. It is made up of extremely porous granular carbon. These pores greatly increase the surface area available for particulate adsorption. The particulates such as dust and other organic compounds react with the activated carbon and stick to the filter through adsorption.

Filson nitrogen filter eliminates solid particles and other contaminates down to 0.01 micron with a collection efficiency of 99.99% from nitrogen gas. Compared with the conventional filter elements, Filson pleated nitrogen filter cartridge increases 4.5 times of the filtration area.

High Pressure Nitrogen Gas Filter Testing Photo

The filters are also categorized by the size of filtration grade. We use 1 micron, 0.1 micron

Filson nitrogen filter housings are made of high-quality materials to ensure maximum durability and energy efficiency, such as weld carbon steel and stainless steel for various pressure ranging from 1 barg up to 700 barg, we can supply nitrogen filter housings from titanium, Hastelloy and Monel alloy upon your request.

The interior of the housing chrome-plated to prevent corrosion and process crystallizes. The outer surface is covered with powder paint. Seals for Filson nitrogen filter can be chosen individually, depending on the cleaning medium.

Additionally it can be equipped with pressure gauge, allowing to determine the extent of contamination in the inlet and outlet, as well as condensate drain.

Filson nitrogen filter cartridges are made of various filter medias like paper, synthetic, polyester, pp, coalescing, activated carbon, stainless steel wire mesh, sintered bronze, sintered wire mesh, sintered powder and so son.

Nitrogen Gas Generation Drawing

When you choose a suitable nitrogen filter for your process, there are some important factors you should care about. The first thing you need to consider is the filtration efficiency and the pressure loss, then you also need to select appropriate connection type and size. If you have trouble in making right choice of Filson nitrogen filter, feel free to contact with us.

In addition, Filson can offer a whole range of alternative nitrogen filter elements for filter housings from other brands. For example: Parker nitrogen filter, Balston nitrogen filter. Our high-quality nitrogen filter is compatible with your nitrogen generator system.

Nitrogen Generation Process

All of our filters are independently validated and meet the ISO8573.1 norm and the ISO12500.1 norm. Filson nitrogen filters can be constructed with FDA approved materials and are standard validated by inspection bureau.

Our customers rely on our superior technical capability and exacting manufacturing standards. Superior value, high quality, exceptional and tailored solutions are guaranteed. The nitrogen filter that Filson provides are well established, internationally recognized and supplied to major customers worldwide.

NPT Thread connection Carbon Steel Nitrogen Gas Filter

If you have any need for Filson nitrogen filter, we are always here to support you satisfied service and awesome product. Send us your inquiry for Filson nitrogen filter.

More details to be known by the following ways:

Phone: +86-157 3695 8886


Stainless Steel Nitrogen Gas Filter Cartridge

Filson Nitrogen Filter Function:

  • Eliminate water, oil fume, moisture and solid particles out of nitrogen gas
  • Protect integrity of the products and other equipment
  • Increase the lifespan of the more fragile filters and downstream equipment
  • Cut down operational costs and save consuming cleaning time of the sterilize parts
  • Maintain a continuous clean and sterilizing environment

Filson Nitrogen Filter Features:

  • Good heat and corrosion resistance for high-quality material
  • Reduce operation cost by eliminating the unwanted particulates from nitrogen filter
  • Ensure the quality of your products and reduce possibility of production down time
  • Washable and reusable by counter flow, solvent ultrasonic cleaning method
  • Improve high-pressure resistance performance by using compact and high-quality material
  • Long service life and low maintenance cost
  • Inline connection, no moving parts, easy to install
  • Small filtration resistance, large pollutant capacity and less chance of clogging

Filson Nitrogen Filter Specification:

  • Nitrogen filter housing material: stainless steel wire mesh, cast aluminium, plastic and more
  • Filter cartridge material: sintered powder, 316L stainless steel, polypropylene, polyethylene (PE and PA), PTFT, PVDF etc
  • Working temperature range: from -10℃ to 204 ℃(high temperature environment up to 454℃, at this time, the sealing materials is replaced with expanded graphite)
  • Max working pressure: 3000 PSI
  • Filtration rating: 0.01 micron to 6000 micron
  • Filtration efficiency: up to 99.99%
  • Flow rate: up to 8000 NM3/H
  • Filtration grade: pre-filter, micro-filter and activated charcoal filter are all available
  • Color: available in various color at your request
  • Connection mode: aluminium housing with thread connection and steel casing with flange connection
  • Connection size: from 1/8 to 8 inch or customized
  • End cap: galvanized for compressed air filter
  • Inner core: galvanized pleated plates
  • Inlet and outlet size: from 1/8 inch to 1/2 inch tube fitting or customized

Filson Nitrogen Filter Application:

  • Nitrogen generation station
  • Chemical manufacturing
  • Large water treatment
  • Pharmaceutical air/gas filtration and product transfer
  • Burring reduction in laser metal cutting
  • Preservation of food and beverages.
  • Filtration of air in aseptic packaging
  • Filtration of compressed air of other inert gases
  • Wave soldering in electronics
  • Manufacture of plastics (PET)
  • Elimination of combustion in fire prevention
  • Laboratory nitrogen supply

Nitrogen Filter: The Ultimate FAQs Guide

In this guide, you will find every information about nitrogen filters such as material type, quality standards, nitrogen generator, and features, among other aspects.

So, if you want to be an expert in nitrogen filters, read this guide.

How do you Filter Nitrogen from Air?

You can filter nitrogen from the air using different methods.

Common methods of acquiring pure nitrogen from the air through industrial preparations involve three main methods.

These include:

Nitrogen gas filter

Nitrogen gas filter

· Cryogenic Methods

When using this type of nitrogen separation from the air, you achieve the separation through fractional distillation of liquid air.

Consequently, you will achieve separation following four key steps involving cooling, isolating the nitrogen, separation from air and collection.

Initial production stages involve compressing the ambient air then cooling it about 10°C.

Removal of water vapour, oil and other pollutants is achieved by passing the cooled, compressed air through a series of filters.

Pass the clean, compressed air through a heat exchanger into an expansion engine.

The process causes rapid expansion, resulting in a drop in temperature beyond the condensation point, and liquefy.

Nitrogen is then extracted for the liquefied air through a high purity fractional distillation and stored.

· Nitrogen Generators

There are two main types of nitrogen generators; PSA and Membrane generators.

Using on-site nitrogen generators significantly lowers the risks associated with the transportation of nitrogen from industrial plants.

These risks concerns include corrosion, safety, cylinder deterioration, and high maintenance costs.

As a result, on-site production of nitrogen using nitrogen generators can lower costs by between 40 and 80 percent in comparison to the importation of nitrogen.

Furthermore, nitrogen generators are easier to maintain and are environmentally friendly.

· Membrane Nitrogen Generators

Membrane nitrogen generators will suit you well if you are operating a small scale or medium industry.

It produces lower nitrogen purity levels compared to PSA generation systems of between 95.0% and 99.5%.

These systems separate nitrogen and other gases by forcing the compressed air into a vessel and then selectively permeating water vapor, oxygen, and other pollutants.

Pure nitrogen emerges at the end of the production channel in the form of a gas.

· PSA Nitrogen Generators

The pressure swing adsorption technology operates under the principle of preferential adsorption and desorption of gaseous contaminants by CMS (molecular carbon sieves).

You should consider this technique of nitrogen purification if you constantly require pure nitrogen for use in your process application.

It can deliver purity levels of between 95 and 99.9995%.

Purification occurs simultaneously following two production stages:

· Adsorption

It is a continuous process that eliminates the vapor, oxygen, and other pollutants from compressed air, thus leaving pure nitrogen for collection and storage in tanks.

However, the efficiency reduces as the surfaces of molecular sieves saturate, eventually stopping with complete saturation.

· Desorption

It reverses the process of adsorption by releasing oxygen trapped on the surface of molecular sieve material.

It regenerates the molecular sieves in preparation for the next cycle of adsorption.

Is Nitrogen Filter same as Nitrogen Membrane?


A nitrogen filter is a gas cleaning device used to remove contaminants that may be present in nitrogen gas to achieve high quality and pure nitrogen gas.

Contrastingly, nitrogen membrane generates pure nitrogen from compressed atmospheric air.

It forces the air through a device with a microscopic spore that enables oxygen, water, and trace contaminating gases to escape through permeation.

Pure, pressurized nitrogen gas is collected at the end of the device in tanks.

What is the Best Material for Nitrogen Filter Cartridge?

You can construct your nitrogen filter using diverse construction materials.

Some of the most suitable materials include:

  • Polypropylene
  • 316L stainless steel
  • Polyethylene (PE and PA)
  • Polytetrafluoroethylene (PTFT)
  • Sintered powder metal
  • Polyvinylidene Fluoride (PVDF) etc.
How does Nitrogen Membrane Filter Work?

The nitrogen filter membrane was developed in the 1980s for the generation of pure nitrogen gas from the atmospheric air.

Initially, compressed atmospheric air is passed through the air dryer to remove condensate water.

The dry compressed air then gets into the air receiver vessel which provides adequate air pressure to the Nitrogen Membrane Generator.

The fourth stage involves filtration of the compressed air using a pair of acetate filters of 0.1 and 0.01-microns pore sizes.

These two filters get rid of particulate contaminants and water.

It then passes through a carbon filter to remove any residual oil before proceeding to the membrane filter separators.

The Separation Stage

This stage is responsible for the production of pure nitrogen gas.

It constitutes the nitrogen membrane filter which separates different gas molecules and traps nitrogen as the end product.

Here, the compressed air goes through the membrane which comprises a bundle of semi-permeable hollow fibres.

It operates under the principle of selective permeation where the fast-moving gases like water vapor, argon, carbon dioxide, oxygen etc. permeate the walls faster than nitrogen.

Usually, nitrogen is too slow and its molecules too large to permeate the microscopic holes.

Since nitrogen gas exits on the downstream of the membrane as a high-pressure gas.

You can always control the purity of the gas by adjusting the operating conditions, that is, increasing or reducing the nitrogen flow rate.

What are the Features of High-Pressure Nitrogen Filter?

A high-pressure nitrogen filter is an ideal for bulk filtration of pure nitrogen in high flow applications.

A high-pressure nitrogen filter should:

 Nitrogen filter system

 Nitrogen filter system

· Be Reliable

Select a nitrogen filter that has been fabricated using high-quality materials such as stainless steel.

The materials should be also resistant to corrosion and used along with epoxy seal caps, double O-ring and stable core support for optimal filtration performance.

· Available for Use in Wide Functional Range

The filters should be able to withstand a wide range of operating conditions without adverse effects on filtration efficiency.

Consequently, you can even use the filters for filtering other inert gases or air.

· Optimal Removal of Pollutants

You should achieve maximum removal of dust, water and oil droplets and aerosols when using the high-pressure nitrogen filters.

· Guaranteed Safety

The filter housings are fabricated and tested for surety of withstanding the maximum system pressure on which it is to be used.

Ensure that the filter housing you select has undergone all the required tests and certified appropriately.

· Ideal for Applications with High Flow Rates

Excellent fabrication with attention to all regulatory and conformity to industrial standards ensure manufacture of quality filters.

The filters can support high-velocity processes with flow rates of up to 6, 500 Nm3/h.

· Low differential Pressure

Low differential pressure is suitable for smooth flow and efficient product filtration with excessive energy waste.

You will save a lot of money that you would spend on the energy required to overcome a filter with high differential pressure.

· High Dirt Holding Capacity

A high-pressure filter with a large dirt holding capacity is ideal for use in high flow applications.

Using porous powdered material for constructing the filter elements will significantly reduce your maintenance cost and interval.

Similarly, you will require a much smaller housing assembly than that you would need for a standard size filter.

 What are the Benefits of Nitrogen Gas Filter?

The main benefits of using high quality and high throughput nitrogen filter are the provision of clean and high purity nitrogen gas.

Other advantages of using a nitrogen filter include:

  • It is constructed using compact and strong materials that can withstand high operating pressure.
  • The material of construction is non-toxic and compatible with process applications involving human consumables.
  • Highly durable compared to standard filters
  • These filters have lower capital investment, high dirt holding capacity, and will replace several standard filters.
  • Have high contaminants removal efficiency
  • Excellent energy savers, thanks to their low pressure drop.
  • Possess a wide range of chemical compatibility. The filter is anti-corrosive, anti-acidic, and anti-alkali
Where can you use Nitrogen Filter?

You can use nitrogen filters in diverse kinds of applications that require a constant supply of pre and clean nitrogen.

Some types of nitrogen filters are multipurpose and will also provide adequate filtration of other inert gases or compressed air.

You can use your nitrogen filters for the following applications and industries:

  • Chemical manufacturing (blanketing)
  • Large water treatment
  • Pharmaceutical air/gas filtration and product transfer
  • Burring reduction in laser metal cutting
  • Preservation of food and beverages.
  • Filtration of air in aseptic packaging
  • Filtration of compressed air of other inert gases
  • Wave soldering in electronics
  • Manufacture of plastics (PET)
  • Elimination of combustion in fire prevention
  • Laboratory nitrogen supply
What are the Components of Nitrogen Filter?

Just like any other filter, a nitrogen filter comprises two main parts, the housing and the filter element:

Parts of nitrogen filter system

Parts of the nitrogen filter system


You can construct your nitrogen filter housing using assorted kinds of construction material.

Depending on the functional requirements, you can choose stainless steel, cast aluminum, plastic etc.

You can also select carbon steel to fabricate housings intended for use in high-pressure applications.

You can coat the interior of the housing with anti-corrosive material such as chrome to prevent process crystallization and corrosion.

The housing will host the following key components:

  • Ports: Inlet and outlet ports for entry and exit of contaminated and clean nitrogen gas
  • Sump: Located at the bottom of the bowl and collects the contaminants filtered out.
  • Differential pressure gauge: Indicates the extent of element contamination.
  • Drains: For periodical removal of collected contaminants.
  • Pressure relieve valve: Helps remove excess pressure before opening the housing for element change-out.
  • Seal: You should select the seal based on the type of your cleaning medium.


Your filtration nitrogen filtration element is the most crucial part of the nitrogen filter.

Similarly, you can use diverse types of materials though PTFT is the most preferred for filtration of nitrogen.

Check on the grade and the rated filtration efficiency before purchase.

What Materials does Nitrogen Filter Remove?

Nitrogen filters can remove different kinds of pollutants that might contaminate pure nitrogen on transit, piping, on storage etc.

Generally, you will remove the following types of contaminants:

  • Water
  • Solid particulates
  • Oil aerosols
  • Organic impurities
  • Other contaminating liquids like chlorine
  • Odour etc.
What is Nitrogen Generator?

A nitrogen generator is a device you can use to extract pure nitrogen from atmospheric air.

There are three types of nitrogen generators; membrane generator, PSA generator and cryogenic generators.

How do you Choose a Suitable Nitrogen Filter?

Filter efficiency significantly depends on the characteristic of the nitrogen filter you select.

Consider the following factors when selecting an ideal nitrogen filter:

· The Pressure Loss

You should select a filter with a very low-pressure loss.

Whereas some filters can have an initial pressure loss of up to 3.5 psi, numerous products in the market have a pressure loss below 1.8 psi.

A filter with a higher pressure loss will consume more energy because the compressor has to work harder to meet the demand.

A filter with a lower pressure loss also affects the size and footprint of the filtration system.

You will not need to use a bigger filter with more filtration space to compensate for the pressure loss.

A smaller filter will reduce the system footprint and save you much more money.

· Serviceability

Choosing a market-leading product for serviceability will save you much money and time since they always have a reduced footprint.

You should select a filter that is easy to open for filter change-out to enhance the work speed and save on downtime costs.

Select a filter with a drain that can be externally accessed for drain servicing.

It helps you save time compared to drains that require the bowl to be removed for servicing.

· Connection Sizes

You select a filter from a manufacturer with a wide range of products whose connection sizes are flexible and will easily fit with evolution in connection sizes.

· Filtration Efficiency

The contaminants removal efficiency will depend on ideal pairing with correct flow rate, micron rating, types of contaminants, pressure rating, operating temperature, etc.

Ensure that your product is compliant with ISO 8573-1:2010 requirements and is capable of delivering the product purity required.

What is Pressure Swing Adsorption Technology?

This technology is used to separate a certain gas from a mixture of other gases based on its affinity for an adsorbent material and its molecular characteristics.

The principle of operation relies on the fact that gases tend to get attracted to the solid surfaces when subjected to high pressure.

You can produce a high-quality nitrogen gas by controlling the process of gas adsorption and regeneration of adsorbent beds.

You can achieve this by changing the pressure in the two adsorber-adsorbent containing vessels by monitoring a constant temperature that is close to the ambient temperature.

Can you use Ultra-clean Gas Filters for Nitrogen Purification Needs?

Yes, you should use an ultra-clean gas filter where the cleanliness requirement is stringent.

An Ultra-clean nitrogen filter will achieve high capacity and purity outputs that removes 99.9999% of the contaminants.

These filters deliver pure nitrogen gas with less than one ppm moisture, oxygen, and trace polluting contaminants.

In most cases, the ultra-high purity nitrogen filters possess two or more filters and trap for removal of unwanted gases, moisture and hydrocarbons.

Depending on your process application, the ultra-clean high purity gas filter can deliver up to 20L/M of pure nitrogen gas and more.

How does Nitrogen Filtration in PSA and Membrane System compare?

Several factors influence the choice of a particular filtration system.

The following factors will determine what kind of technology is best suited for your application.

These two purification technologies compare as follows:

· Product Purity

PSA purification technology can achieve a higher nitrogen filtration efficiency compared to membrane purification technology.

When you use PSA, you will achieve a product purity level ranging between 95% and 99.9995%.

On the other hand, you will achieve purity levels between 95 and 99.9% only.

· Reliability

Membrane purification technology is easier to manage and maintain compared to PSA technology.

The membrane generation units usually have few to no moving parts that will last for years if well maintained.

Maintaining PSA is a little bit complicated because it has several moving parts.

However, it will also serve for several years if you maintain it well.

· Maintenance

Both PSA and Membrane generators require very little maintenance practices.

The major maintenance practice that you can perform for a PSA generator is replacing the filter cartridge.

Other components like molecular sieves will last for more than a decade when properly maintained.

Similarly, you only need to change the filter cartridges when you are using a dry and clean feed air in the case of membrane generators.

· Consistency

PSA generators will supply you with similar quality of high volume and pure nitrogen throughout its life cycle.

Contrastingly, you will experience a significant reduction in the supply of pure gas with an increase in demand.

How do you Maintain a Nitrogen Filter?

Filter cartridge

Filter cartridge

Nitrogen filters are easy to maintain. The most critical aspect is ensuring the timely replacement of filter cartridges.

You should also schedule frequent filter check-up to ensure that there are no leakages or deformities.

Regularly clean the filter housing using appropriate detergent o remove all the dirt that may affect its performance.

Replace your filter elements with cartridges supplied by the original product manufacturer to avoid any inconsistency in performance.

What is the Quality Standard for Nitrogen Filter?

Your nitrogen filters must adhere to the quality standards required of compressed air filters.

Ensure that you subject your filters have been tested according to and met the standards specified under ISO 12500 standards.

Similarly, you can also rate your filters according to product cleanliness standards as specified in ISO 8573:1.

How do you Determine the Efficiency of Nitrogen Filter?

You can determine the efficiency of a nitrogen filter following the methods used to determine the filtration efficiency of compressed air filters.

You can perform either a DOP test or a multi-pass test as described under ISO 12500-1 standard specifications.

Accordingly, you should supply a known quantity of contaminants to the incoming, clean nitrogen stream.

Use a photometer to determine the amount of contaminants counts upstream and the quantity downstream while recording the pressure drop simultaneously.

Work out the beta ratio from an average of the three readings.

The result should give the contaminants removal efficiency and expected pressure drop of the filter.

How much do Nitrogen Filter Cost?

The cost of a nitrogen filter significantly varies.

For instance, industrial nitrogen gas filters for liquefied petroleum gas will cost between $ 50 and $ 9000 per unit when acquired at a wholesale price.

When should you Replace the Nitrogen Filter?

You should replace your nitrogen filter when it has reached the change-out pressure.

The pressure gauge will alert you when the change-out pressure is due, and the elements are ready for replacement.

The change-out pressure may range from 8 psi to 10 psi and usually come with the filter manual.

How do Oxygen Filters compare to Nitrogen Filters?

There are no major differences between the two filters except for the fact that you have to make a lot of considerations while selecting the construction material.

For instance, you have to avoid any flammable material when constructing an oxygen filter because it can easily ignite and burn the whole filtration system.

On the contrary, nitrogen gas is inert and such considerations are not as critical as in the case of oxygen filters.

At FilSon Filters, we design and manufacture a range of filtration systems.

Whether you want liquid filters or air filters, FilSon offers a perfect solution for you – contact us now.

Send Your Inquiry Today
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