Filson Dry Gas Filter

  • Safe operation and easy maintenance
  • Perfect design for fast and easy filter cartridge replacement
  • Comply with ASME code and EU certification with ISO quality
  • Optional horizontal and vertical design based on your requirement
  • High filtration performance and good corrosion resistance
  • Good quality material to construct dry gas filter

Filson dry gas filter are available in horizontal and vertical versions. They can be equipped with quick opening and closure to minimize cleaning and maintaining time. This is a big advantage to cut your costs in industrial or commercial usage.

  • Construction material: glass fiber, 316L stainless steel
  • Dimensions: according to your final application
  • Coalescing efficiency: 99.9%<001 pm
  • Filtration micron rating: down to 0.001 micron
  • Flow rate: 1100-27000 Nm3/h
  • Number of filter elements: 1-105
  • Filtration efficiency: 100% above 3 micron, 99.5% from 0.5 to 3 micron
  • Operating temperature range: from -70 ℃ to 250 ℃
  • Connection: flange connection
  • Connection size: ASME or DIN 3/4 inch to 8 inch or DN 20-DN 200

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Filson Dry Gas Filter

Your Best Dry Gas Filter Supplier in China

Filson dry gas filter is a filtering unit for the gas pipeline or gas processing facility in which there is no liquids, but with solids in the flow stream. It is commonly horizontal vessel with filter cartridges inside.

Filson dry gas filter has a high filtration performance. The solid removal efficiency was 100% at 10 micron or above, and 99% at 1-3 micron. It can fully meet your most dry gas filtration applications.

As gas comes out from reservoir through special tubing and pipes, gas flow contains solids after passing removal of mist, which gas to be filtered before gas is supplied to valve and metering units. In this case, dry gas filters are required. Here, Filson dry gas filter is your best choice.

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

Any other questions? Click Here for more information.

Dry Gas Filter: The Ultimate FAQ Guide

I know you’re looking for dry gas filters.

Or, you would like to learn more about dry gas filter – function, working principle, parts, installation process, and replacement, among other aspects.

Whichever the case, this guide has all information you’re looking for.

It will make you a dry gas filter expert – keep reading.

What is a Dry Gas Filter?

A dry gas filter is a standard horizontally installed filter vessel that has got filter cartridges in its interior sections to extract solid contaminants from a gas flow.

A vertical dry gas filter is also another option.

Note that; the dry gas filter selectively extracts solid particles from the gas phase but not liquid or slug-like contaminants.

Therefore, you should pick on the dry gas filter whenever you operate a critical facility that requires an impurity-free gas.

Dry gas filter
Dry gas filter

What is the Function of the Dry Gas Filter?

The dry gas filter does two essential functions.

The primary role of installing a dry gas filter in your industrial unit is necessary to purify your gas flow (natural gas) from solid contaminants.

Remember, there should be no liquid present in the gas before the filtration.

So whether you have a gas pipeline installed or operate a gas processing facility, then the device will be helpful.

That is so because the filter can guarantee you a solid free gas.

Besides, since the filter provides an efficient way of filtering extensive to micro-sized solid particles in the gas stream.

It thus prevents the downstream filtration equipment from any potential damage while improving their safety, and preserving their integrity as well as efficiency.

These instruments include adjusting valves, general valves, and other critical devices.

That, therefore, results in an extended lifespan of the essential equipment, which will save you from unnecessary equipment replacements.

What are the Contaminants Filtered by the Dry Das Filter?

In the course of the gas filtration system, there are a few forms of solid type contaminants that may hamper the purity of the gas.

They include;

  • Dust particles from the natural gas stream
  • Rust particles gas pipes
  • Pipeline scales
  • Sand and silica
  • Catalyst fines
  • Desiccant particles

How Efficient are the Dry Gas Filters?

Generally, dry gas filters are highly efficient state of the art devices.

Nevertheless, the degree of efficiency of the dry gas filters still varies with the contaminant sizes.

Therefore, it means that when extracting large particles, the equipment would quickly achieve a top-notch filtration level.

Conversely, the efficiency decreases with smaller micron-sized particles.

In particular, the device achieves 100% efficiency in the removal of solid particles sized of about 3 microns and more.

However, for 1 to 3 micron-sized contaminants, the efficiency clocks 99%.

That is with a corresponding reduction when dealing with less than micron-sized particles.

Despite that, the machines’ degrees of the efficiency vary depending on the associated manufacturers and level of expertise incorporated.

That is why you have to wisely evaluate the technical specifications of the device before placing any quotations.

Most importantly, always ensure only to engage certified manufacturers of the dry gas filters.

Which are the Most Effective Media of Filtration with the Dry Gas Filter?

 Dry gas filter media

Dry gas filter media

Now, the dry gas filter does not purify any kind of gas media.

No wonder, you have to evaluate your gas media before purchasing any filter initially.

Take a look at the following working media of the dry gas filter.

  • Natural gas
  • Propane
  • Ammonia
  • Ethylene
  • Methyl chloride
  • Propane
  • Propylene
  • Biogas
  • Ethane
  • Helium
  • Air
  • Carbon Monoxide/ Carbon Dioxide
  • Methane
  • Hydrogen
  • Halocarbons

What are the Typical Features of the Dry Gas Filter?

Dry gas filter system

Dry gas filter system

i. Skid Mounted Packages

Whenever needed, the dry gas filter comes accompanied by the mechanical and electrical components.

These involve instrumentations that suit your site needs.

The skid packages, however, must adhere to your specific application requirements.

ii. Flanges

The filters have flanges, specifically the blind flange, which gives quick access to the filter chambers to enhance proper elements replacements.

Also, Quick opening closure effectively reduces to a minimum the cleaning and maintenance procedures.

iii. Customized Capacity Ratings

Depending on your site requirements and applications, you can engage the manufacturers to customize your unique capacity.

Alternatively, you can choose from the available filter cartridges with nominal micron ratings of 0.3, 0.5, 1, and 5.

iv. Durable Internals

Most of the interior components of the dry filter are stainless steel material or carbon steel, which are long-lasting.

In particular, the cartridges could be of perforated sheets, galvanized carbon steel, or stainless steel.

The filter element is mostly fiberglass.

v. Highly-efficient Filter Elements

Dry gas is prevalent for efficiency, with up to 100% or even 99.5 % efficiency in the removal of contaminants.

vi. Controllers and Indicators

The equipment comes with an already installed wide range of operational set-ups to enhance their efficiency by creating a user-friendly operation.

They may include pressure indicators, pressure transmitters, switch power buttons, etc.

vii. Flow Control Equipment

The equipment has got functional valves, some of which are adjustable to regulate the inflow of the gas into the system automatically.

These valves are often for the inlet and outlet sections.

Other associated features of the dry gas filter comprise a multi-layer coating usually three-layered; insulation and fireproofing; and distinct electrical and signal lines.

What are the Underlying Benefits associated with the Dry Gas Filter?

Dry gas filter system

Dry gas filter

The following are some of the several reasons you should install a dry gas filter in your gas facility:

The filters have a High efficiency in removing solids contaminants from the gas interface, thus protecting the downstream system.

Furthermore, the dry filters are suitable for installation and operation in the onshore and offshore applications.

Besides, you can install it outdoor.

The device is safe to operate, and it is user friendly; it requires no particular kind of specialized training to work.

Besides, the equipment has enough piping systems and arrangements, which guarantees you effective operations.

Moreover, replacing the filter cartridges is also quick and easy: no complicated procedures.

The dry gas filter is easy to maintain and clean.

The machine also comes with spare parts, including extra filters.

Additionally, the spare parts are available in the local retailers and stores.

The outer material casing and the interior sections of the dry gas filter are resistant to corrosion.

Finally, the entire machine saves space since it consumes little floor space for installation.

What are the Parts of the Dry Gas Filter?

 Parts of dry gas filter system

Dry gas filter system

Rule of thumb always seeks the technical manual of the specific dry gas filter to know the exact parts of the machine.

Regardless, some of the conventional parts of the dry gas filter include but not limited to;

  • Filter cartridges – The cartridge materials are usually Polyester, nylon, glass fibers, polypropylene, amongst others.

Besides, they have got both inner and outer cores that protect against corrosions.

  • Filter elements; for the dry filters, they are responsible for the actual removal of the solid contaminants.

You should select the filter elements according to the pressure drop, level of efficiency you need, and your operating conditions.

  • Pressure indicator gauges
  • Filter housing- forms the outer covering of the whole filtration system.
  • Filter Support grids- to position in place the filter housing.
  • Inlet and outlet nozzles
  • Vents
  • Drains
  • Opening valves
  • Flanges and gaskets connections
  • Bolts

How do we Classify Dry Gas Filters?

We can widely categorize Dry gas filters in terms of two perspectives. They include:

· According to Configurations

In terms of configurations, the dry gas filters can either be vertical or horizontally oriented.

So basically, the vertical and horizontal configurations refer to the inclination of the dry gas filter during installation into the gas facility.

The vertical dry gas filter assumes a vertical inclination while the horizontal dry gas filter assumes a horizontal tilt.

A conspicuous different design option for both the dry gas filters configurations vary according to the nozzle inclination and support mechanism.

Consider the following brief various aspects of the dry gas filters.

· Horizontal Dry Gas Filter

 Horizontal dry gas filter

Horizontal dry gas filter

Position of the nozzle: For the horizontal dry gas filter, their outlet nozzles are characteristically in the downstream head while the inlet nozzles fixed in the upstream head of the vessel.

Support technique: the primary support mechanism for the horizontal dry gas filter is the integral saddles.

Space consumption: Compared to the vertical dry gas filter, this type of configurations utilizes a larger floor space due to its horizontal inclination.

Vertical Dry Gas Filter

 Vertical dry gas filter

Vertical dry gas filter

Position of the Nozzle: Unlike the horizontal dry gas filter, the outlet nozzle for the vertical dry gas filter designs can be in any radial direction.

Thus the vertical dry gas filters have the outlet nozzle fixed in the lower half of the whole vessel while the inlet nozzle in the upper half segment.

Support technique; the vertical dry gas equipment has got a support mechanism of either support legs or skirts.

Space consumption: the vertical dry gas filter utilizes more overhead spacing than the floor spacing since it is radially inclined.

It, therefore, means that you have to reconsider the height of your operational facility.

Which is the most Effective Type of the Dry Gas Filter?

Note: despite the difference in configurations of the dry gas filters, the horizontal dry gas filter configuration is popular.

That is because several users report that it is more cost-effective and easier to maintain than the vertical dry gas filter

However, the efficiency in the removal of the contaminants by the dry gas filters does not depend on the filter configuration.

For that, it is always advisable that you consider the technical specifications of the machines before buying.

After that, you establish the most efficient one by evaluating their corresponding micron ratings.

What is the Design of the Dry Gas Filter?

The design of the dry gas filters is simple and straightforward.

Besides, the primary chamber, which is the inlet, permits the positioning of the inlet nozzle either vertically or horizontally.

Also, the former arrangement is for the vertical dry gas filter during the later for the horizontal dry gas filter.

As initially mentioned, the nozzles for the horizontal configuration is in the downstream and upstream head.

Elsewhere for the vertical inclination, the vents are in the radial directions: lower half and upper half.

Additionally, for either design, the primary inlet chamber must contain the filters elements.

Whereas the secondary exists are a fixture point for the outlet nozzles besides being the passage for the clean gas.

Also, there are some end closures, either rapid opening closures or blind flange at the extreme ends of the filter.

These closures enable convenient access to the equipment’s interior chambers for quick replacement of the elements or cleaning.

In regards to the diameter lengths: the equipment that has 30ʺ sizes and more should come equipped with smaller sized closure.

Again, the diameter of the filters usually ranges from approximately 2ʺ to 6ʺ for small diameters.

But the larger diameters range from the length of 18ʺ to 72ʺ.

An optional component would be the drain nozzles, which are critical for utilization throughout the first hydro test or even successive cleaning procedures.

With regards to the support, as prior stated, the horizontal type filters have got integral saddles while the vertical types either have support legs or skirts.

What is the Working Principle of the Dry Gas Filter?

The equipment operates pretty simple to guarantee the purity of the gas utilized in the industry.

Below is how the filter operates.

The Entry of the Gas: First, the impure gas gains entry into the filter vessel via the inlet chamber.

Actual Filtration: The actual filtration occurs through several filter elements.

Inside the vessel, the more significant sized massive solid particles fall into the container while the gas goes through the cartridges.

The cartridges filter the finer solid particles present in the gas stream.

Now, the cartridges are solely crucial in ensuring that any available particle in the gas must always remain in the element structure even after filtration.

With that, you achieve a pure gas that is free from contaminants.

Note a standard configuration of filters, the flow of the gas is usually from the outside to the inside.

However, with the inversion of the cartridges, it is possible to achieve the reverse process.

Exit: The subsequently purified gas will then flow back out of the filter via the outlet chamber.

How do you Select a Suitable Dry Gas Filter?

Selecting a dry gas filter is one of the essential aspects that you have to take with a lot of precision.

You may want to pre-review the manufacturer’s product manual or, if necessary, engage an expert.

Nevertheless, when selecting the dry gas filter, be keen to consider the following critical factors.

 Dry gas filter system

Dry gas filter system

· Cartridge Filter Integrity

The cartridge filter should reveal structural integrity capable of preventing the flow of gas through the unfiltered outlets.

The filter should be highly efficient and, if possible, to have a dual-core that is the inner and outer core.

That is capable of protecting against erosion, especially in high flow applications to accommodate the enormous solid loading capacity.

Moreover, you can consider the following technical specifications of the cartridge filter.

They include end load, fabrication integrity, material compatibility, and flow fatigue.

You can as well verify the integrity of the seam seals, end cap, amongst others.

· Pressure Drop

You must comprehend the significance of the pressure drop across the cartridge together with the element.

The pressure drop is particularly essential whenever you size filters.

Exclusively, you may consider the elements which have a low-pressure drop at high beta efficiency.

You need to also enquire about the collapsing pressure drop value and the varying range of pressure drop during operation.

· Efficiency

The extent of efficiency will determine the overall filtration achievement in extracting contaminants from the gas.

Depending on the level of impurity of your gas, you have to select the most efficient filter.

The key aspects to consider comprises of the particle size of contaminants present in your gas.

· Collapsing Rating

You have to importantly consider the differential pressure across the filter media, which can potentially trigger the failure of the element.

Such value is the collapsing rating.

For instance, the filter elements with a bypass-valve do have a collapsing rating almost twice higher than one with a full-flow bypass-valve.

· Contaminant-Holding Capacity

Contaminant holding capacity is also known as the dirt holding capacity.

Critically, always check the highest quantity of contaminants a filter media can sustain without hampering its filtration efficiency.

The value varies according to the filter type and the size of the filter system.

The manufacturer should provide such a rating because it determines the filter life span before the need for replacements.

When replacing your filter element, find out the DHC of the old filter element before making any purchase.

· Gas System or Application Requirements

More importantly, you have to consider your overall gas system facility requirements.

Having known such essential needs, you should then settle on a perfect dry gas filter.

Do not leave out the application requirements.

Such information will consist of the location of your facility, flow rates, vibrations, expected contamination levels, etc.

· Type of Operational Media

When you specify the exact type of gas you intend to clean, then your chances of acquiring a perfect filter are high.

Different gases exhibit different chemical and physical traits.

Some gases may be corrosive, others mild, some neutral while others are excessively corrosive.

Again, different types of gases contain several degrees and sizes of contaminants.

Most importantly;

This critical information should be adequate in informing your choice of unique system requirements for your filter, which corresponds to your applications.

· Testing and Inspection Modules

Ensure that your equipment passes the following protocols.

  • Non-Destructive Examination (NDE)
  • Impact Test
  • Radiography (RT)
  • Hydrostatic Test
  • Coating test & Inspection
  • Function Test
  • Dye Penetrant
  • RW HT
  • Ultrasonic
  • Material certification
  • RMI Test
  • Magnetic particle
  • Special Heat Treatment

What is the Installation Procedure for the Dry Gas Filter?

The installation procedure for either the vertical or horizontal dry gas filters is similar, as illustrated below.

i. Connect the dry gas filter with the appropriate piping while noticing the right inlet and outlet positioning.

Remember to do this according to the drawings and the filter structural properties.

ii. Check whether all the connections to the pressure indicator, vents, drains, etc. are appropriately in place and ready to operate.

iii. Apply pressure to the filter then verify if there is no kind of leaks.

iv. Now turn on the filter into operation.

v. Finally, examine the pressure drop across the filter to note the value when in clean condition. You can take the reading from the differential pressure indicator.

What are the Technical Specifications of the Dry Gas Filters?

The following are the typical technical parameters of the equipment.

However, you can customize any of the specifications by including other additional parameters.

  • Manufacturing standards; they include GB 150, ASME VIII-1
  • Filtration accuracy: 0.3, 0.5, 1, 5, 10 µm, etc
  • Filtration efficiency: 99.5%, 99%, 98%, 97% etc.
  • Configuration; horizontal or vertical
  • Equipment material: carbon steel, stainless steel
  • Cartridge material: consists of Polyester, polypropylene, nylon, glass fibers, etc.
  • Vessel diameter
  • Flow rate
  • Number of filter elements
  • Maximum and minimum temperature
  • Collapsing pressure/ rating
  • Standard sizes.

Which are the Quality Standards and Codes for Dry Gas Filters?

To guarantee the quality of your selected dry gas filter, verify if it conforms to the following codes and standards:

  • ASME Sec VIII, DIV 1
  • ISO 8573
  • EN 10204 type 3.1
  • API 14C (for offshore applications)
  • ASME B16.5 and ASME B16.47

When should you Replace a Dry Gas Filter?

Replacing the entire system is not feasible though you can always replace the filter elements.

It’s the perfect time to consider replacing it when you notice it difficult to clean clogging in the cartridges.

But you should first attempt to clean them and replace them when it’s impossible to remove the dirt.

What are the Care and Maintenance practices of Dry Gas Filters?

The basic practices include cleaning the filter and replacing the elements.

Dry gas filter element

Dry gas filter element


a. Via the appropriate opening, open the filter to access its interior section

b. Check the filter elements to assess its dirt condition.

c. In case the dirt clogging is little, proceed to remove them by use of any suitable cleaning technique such as vacuum cleaning, etc.

Do remember that some filters have got a backwash capability.

Replacing: when you deem the cloggings unable to clean, then you can replace the filter elements.

Similarly, when the efficiency of the filter element sharply declines, then you may return it.

Where is Dry Gas Filter Applicable?

  • Gas pipelines
  • Gas field treatments
  • Chemical processing facilities
  • Metering and regulating stations
  • Gas processing plants
  • Petrochemical plants

In short, if you consider everything highlighted in this guide, you will definitely get the best dry gas filter.

At Filson Filters, we design and manufacture high quality and reliable dry gas filters.

So, if you need filter replacement for top brands in the market, Filson filters offer a perfect solution.

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