Stainless Steel Filter Housing

Rich Experience in Stainless Steel Filter Housing Design & Manufacture

Filson stainless steel filter housings come in various sizes and styles, for use with single or multiple filter bags/cartridges. At a given micron rating, they exhibit splendid filtration performance which is rated at efficiency up to 99.98%.

With over decades of designing and manufacturing experience, Filson became one of the best SS filter housing manufacturers in China. Moreover, we have established long-term and stable relationships with major international logistics companies, to ensure safe and economical transportation.

Stainless Steel Filter Housing

Stainless Steel Water Filter Housing
Filson stainless steel water filter housing, also named SS water filter housing, is an ideal solution for residential/industrial/municipal water filtration with various filter cartridges. Adjustable legs can be offered if required.
316 Stainless Steel Filter Housing
Filson 316 stainless steel filter housing has higher heat&corrosion resistance than 304 grade filter housings, and we can supply relevant material certificates to prove our quality. Standard or customized sizes are all available.
Stainless Steel Bag Filter Housing
Filson stainless steel bag filter housing, also called SS bag filter housing, is particularly beneficial for handing batches of various liquids. It has good interior sealing and accessibility while with ease of filter bag replacement.
Stainless Steel Inline Filter Housing
Filson stainless steel inline filter housing has common single cartridge and sanitary design, providing high reliability and durability for liquid/gas clarification, sterilization or high purity filtration. It is especially suited for relative low flow rate application.
Stainless Steel Cartridge Filter Housing
Filson stainless steel cartridge filter housing, also referred as SS cartridge filter housing, can be provided from single cartridge type to multiple cartridge type. They are suitable for wide range of end-cap configurations such as SOE/DOE.
Stainless Steel Sanitary Filter Housing
Filson stainless steel sanitary filter housing is finely polished containing outside and inside surface, with the roughness less than 0.3μm. It can be widely used in fine filtration and sterilization processes.
Cuno Stainless Steel Filter Housing
Filson Cuno filter housings provide an optimal solution for filtration of cooling water, resin solvents, paint, ink, with excellent durability and chemical resistance. It has smooth electro-polished inner surface for less bacterial adhesion.
Replacement SS Filter Housing
Filson replacement stainless steel filter housing is fabricated by highest grade stainless steel material to provide excellent filtration effect matching with filter bags/cartridges. It can perfectly replace your original filter housing since made by complete cross-reference.
Lenticular Filter Housing
Filson lenticular filter housing features electro polish surface, sturdy 4 legs and totally strict seal design without any leak. Available in 12” or 16” diameter lenticular filter modules with capacity of 1 to 4 typically.

Why Choose Filson Stainless Steel Filter Housing?

  • Quick Response: Whether pre-sale or after-sale, your messages will be responded to within 8 working hours.
  • Innovative design: The extremely innovative technical team will provide you individual appearance with high quality.
  • Rigorous Test: Each filter housing will be tested strictly before packing to ensure the safety of use.
  • Fast Delivery: Standard filter housings will be delivered immediately while customized within 7-14 days.

ss filter housing

Filson Stainless Steel Filter Housing is supplied with flanged or threaded inlet/outlet connections, adjustable legs, drainage port and multiple gauge ports to easily adapt to any request.

For high capacity applications, Filson ss filter housing such as ss cartridge filters and stainless steel bag filters, are secured by eyenut assemblies.

Some ss filters can be chosen with a quick-opening clamp cover.

Filson Stainless Steel Filter Housing is mainly constructed of 304 or 316L stainless steel. It includes stainless steel bag filter housing, stainless steel inline filter housing, stainless steel cartridge filter housing, Cuno filter housing, lenticular filter housing, stainless steel sanitary filter housing, and other stainless steel water filter housings.

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Filson stainless steel filter housing drawing

Compared to other stainless steel filter housing manufacturers, Filson stainless steel filter housing provides the user flexibility to choose the number, type, and size of cartridges needed for chemical compatibility and contaminant-holding capabilities.

stainless steel duplex filter housing

String wound, melt blown, pleated, carbon, membrane, stainless steel… 10”, 20”, 30” and even custom lengths are available in Filson ss filter housing.

stainless steel filter housing

All Filson Stainless Steel Filter Housing is high quality electropolished finish to offer an excellent appearance and to resist adhesion of dirt and scale.

Also, the stainless filter housing features the swing bolts and hinged cover for quick access and easy cartridge change-out.

stainless steel filtration cart

You can import our ss filter housings with standard zinc plated bolts or stainless steel options.

With the Filson’s know-how in the filtration industry, we can help you remain competitive by being your OEM partner for Stainless Steel Filter Housing.

Whether for standard, custom or large flow rate, Filson ss filter housing offers a perfect solution for all market applications.

Features of Filson Stainless Steel Filter Housing

  • Heavy duty 304 or 316L stainless steel construction for maximum durability and corrosion resistance
  • Maximum design pressure is300psi at 250°F (121°C)
  • Flow rates up to 8000pmwith various types of cartridges
  • Single, multi-cartridge, duplex and multiplex units available
  • Flange or thread connections for stainless steel filter housing
  • Clamp or swing bolt closures for quick and east cartridge change-out and secure sealing
  • Bottom outlet and adjustable legs allow for flexible application installation
  • Horizontal version are available for large flow ratewith removable internal cartridge support plate
  • Vent, clean drain & dirty drain connections is equipped for easy cleaning
  • Various seal materials, including Buna, Ethylene Propylene, Viton®, and Teflon
  • Electropolished exterior surface and passivated interior to protect against corrosion

Applications of Filson Stainless Steel Filter Housing

  • Food and Beverage
  • Chemical Processing
  • Oil and Gas
  • Heating/Cooling Systems
  • Pulp & Paper
  • Electronics
  • Reverse Osmosis Prefiltration
  • Water Purification Systems
  • Inks/Paints/Coatings

Filson: Your Premium Stainless Steel Filter Housing Manufacturer with Reliable Performance

Filson stainless steel filter housing, also named stainless filter housing, SS filter housing, is widely used in clarification, sterilization and high purity filtration of liquids and gases. Manufactured in various sizes and styles, Filson SS filter housings can be used with melt-blown, string wound, metal wire mesh, pleated filter cartridges, etc.

316 Stainless Steel Filter Housing factory

Filson stainless filter housings are typically made of SS 304 or 316L material, to provide a rigid construction as well as long service life. They can handle high flow rates, high-pressure situations while offering substantially low-pressure drop.

Standard Filson stainless steel filter housing can withstand the flow rate ranging over 10000 GPM, and certainly, your special requirements are always allowed. Furthermore, when experienced electropolishing or sandblasting as well as pickling&passivation, it features easy cleaning with protected surface.

stainless steel filter housing factory in China

Filson SS filter housing has broad fluid compatibility with excellent corrosion resistance for diversiform liquid filtration applications. Besides, we also supply kinds of stainless filter housings for gas filtration, like inline compressed air filter housing.

Especially for high temperature and pressure conditions, Filson stainless steel filter housings are advanced alternatives to common plastic housings. They can work very well in an environment with temperatures up to 260℃ as well as 300psi pressure.

stainless steel filter housing Filson filter housing manufacturer

Filson stainless steel filter housings are available in single-round, multi-round, single-bag, multi-bag, sanitary, high flow and more types. All of these styles are designed and produced strictly according to commercial or industrial use standards.

Filson stainless filter housing is widely for chemical, food&beverage, bio-pharmaceutical, water industries with inline, T-type and L-type designs. Moreover, fixed legs and equipped with mounting plates, or adjustable legs are allowed for convenience of your independent usage.

stainless steel filter housing how to work

Some types of Filson stainless steel housings achieve hinged swing-bolts and eye-nuts closures with flat cover, while internal construction depends on cartridge end-cap style involving SOE/DOE/222/226… Plus, inlet/outlet connections can be designed with flange or thread types.

In addition, Filson can customize the most appropriate stainless steel filter housings for multiple applications totally depending on your needs. Just send us your specific dimensions or your complete drawings, our experienced engineer team will give you a satisfactory reply.

stainless steel filter housing manufacturer Filson filter

You can look forward to obtaining perfect replacement SS filter housing from Filson, including the replacement of Pall stainless steel filter housing, Pentek stainless steel filter housing, Pentair stainless steel filter housing… With a combination of technical engineers and complete cross-reference data, we will fully assist you to consummate your filtering project.

Compared to other stainless steel filter housing manufacturers, Filson has advantages of certificated raw material, extensive expertise, innovative style design, and considerate service. Additionally, we have our own factory with a complete line from production to quality test, expecting to pleasant cooperation.

stainless steel filter housing SS bag filter housing

No matter for stainless filter housings in different sizes or kinds of filter elements, you can find easily in Filson’s warehouse. Sintered metal filters, wedge wire filters, high flow filter cartridges, wire mesh filters, oil filter elements, water filter cartridges, etc. are totally sufficient in stock, even your large quantity order can be satisfied immediately.

If you have any question or design requirement, we are happy to discuss with you by email. Please send to or call at 86-157 3695 8886 today, we will reply you within 8 working hours!

stainless steel filter housing SS cartridge filter housing (2)

Filson Stainless Steel Filter Housing Features & Benefits:

  • 100% stainless steel construction for temperature&corrosion resistance
  • Effective in critical sanitary or high purity filtration applications
  • Maximum reliability and durability by electropolishing treatment
  • Ease of installation and replacing since flexible connection designs
  • Extremely low hold-up volume for high recovery of valuable liquids
  • Microbiological safety since crevice-free, polished and hygienic design
  • Unique quick opening clamp with NBR/viton/silicone seal o-rings/gaskets

Filson Stainless Steel Filter Housing Specifications:

  • Raw material: SS 304/316
  • Design pressure: Max. 300psi (20 bar)
  • Working temperature: Max. 500℉ (260℃)
  • Flow rate: over 10000 GPM (over 2700 m3/h)
  • Height: 12.5-90 inch (317.5-2300 mm)
  • Diameter: 3.75-47 inch (95-1200mm)
  • Surface finish: electro-polishing, sandblasting, pickling and passivating
  • Inlet/Outlet: ANSI/DIN/…flange, thread

Note: 1. maximum design pressure can be up to 4.5Mpa

     2. other specifications unmentioned above are available upon request

Filson Stainless Steel Filter Housing Applications:

  • Food and beverage
  • Drinking water
  • Chemical
  • Pharmaceutical
  • Seawater filtration
  • Pulp & Paper
  • Heating/Cooling system

Stainless Steel Filter Housing: The Definitive Guide for Importers

Looking for a filter housing that is corrosion resistant and can handle a range of contaminants?

You need a stainless steel filter housing.

And, in this guide, you’re going to learn why you need stainless steel material, the different options available, technical specification, parts, how to replace filter elements and much more.

By the end of this guide, you will be able to import a stainless steel filter for your unique working temperature and pressure.

Let’s dive right in:

Chapter 1: What is Stainless Steel Filter Housing?

It is an enclosed vessel or “container,” made from stainless steel material, which hosts filter element and other components.

It helps to remove contaminants from fluid systems.

It houses filter components such as filter cartridges, bags, and even strainer baskets.

Furthermore, it has a pressure gauge that indicates the working pressure during the filtration process.

Normally, the construction of stainless steel filter housing is such that it withstands all the fluid conditions.

It includes both the inlet contaminated fluid to the outlet filtered fluid.

Stainless steel duplex filter housing

Stainless steel duplex filter housing

For these filters, the primary material is SS 304 or SS 316.

I will walk you through the fundamental aspects about SS 304 and 316, keep reading.

Normally, manufacturers choose stainless steel grades since they can work with the chemical composition of different fluids and resistant to different forms of attacks.

Chapter 2: Advantages of Stainless Steel Material for Filter Housing

Filter housing handles different types of contaminants.

Therefore, you must choose the best material for your filter housing.

Over the years, stainless steel material has become a perfect material for most filter housing.

And, in this section, I will walk you through some of the main advantages of stainless steel material for filter housing.

Stainless steel filter housing

Stainless steel filter housing – Image courtesy: Exporters India

a) They are Corrosion Resistant

The stainless steel exhibits high resistance to corrosion.

Therefore, it can withstand attack in most of the conditions.

Low alloy stainless steel will resist corrosion in any atmospheric conditions.

On the other hand, high alloy stainless steel resists corrosion at elevated pressures and temperatures.

It makes stainless steel filter housing suitable for acidic, alkaline solutions and even chloride environments.

b) Exhibits High and Low-Temperature Resistance

Grades of stainless steel can resist scaling and can maintain its high strength when exposed to very high temperature.

It also tends to show toughness at cryogenic temperatures.

c) Exhibit Long Life Cycle Properties

It is durable and has low maintenance since it is not prone to corrosion attack.

You can use stainless steel filter housing for a long period.

d) Smooth Surface Finish

Making filter housing requires that the surface should be smooth and slippery.

This will prevent dirt from sticking to the surface.

Stainless steel has this quality, and hence it is best used for many applications in piping systems.

e) It is Easy to Fabricate

You can form stainless steel into virtually any shape.

Therefore, you can make stainless steel filter housing with different designs and shapes.

It is easier to cut, weld, machine or form into any shape.

Thus, the fabrication process is easy and simple.

f) It has High Aesthetic Appearance

Stainless steel filter housing looks shiny.

Its surface looks bright always which adds beauty to the piping system.

Stainless Steel Exists in Different Compositions

Stainless steel used in making filter housing is of two grade types namely;

  • 304 stainless steel
  • 316 stainless steel

They have different chemical compositions.

Remember, you can use stainless steel to make filter housing just like other material.

Below is a video showing duplex filters whose housings are made from other materials:

Let’s have a quick comparison between the 304 and 316 stainless steel.

· Alloying Elements in SS 304 and SS 316

SS 304 is composed of 18% chromium and 8% nickel.

On the other hand, SS 316 has 10% nickel, 2% molybdenum and 16% chromium.

Molybdenum makes stainless steel corrosion resistant.

· Practical Functionality and Applications of SS 304 vs. SS 316

Type 304 stainless steel can resist oxidation and corrosion as well.

They can work well in the presence of oxygen at high temperatures.

You can easily fabricate it to have a good surface finish.

It is common in many applications such as making tanks, pressure vessels, tubing, piping and filter housing.

SS 316 is heat resistant owing to its chemical composition.

It also has high corrosion resistance on exposure to many chemical solutions.

Of course, this is due to the chromium-nickel elements.

Please note this:

Since SS316 stainless steel alloy has molybdenum, it exhibits considerable more resistant to chemical attack than SS304.

Type 316 stainless steel is long-lasting (durable), and you can easily fabricate, clean, weld or improve the finish.

It is considerably more resistant to solutions of sulfuric acid, chlorides, bromides, iodides and fatty acids at high temperature.

Stainless steels having molybdenum are a perfect choice for many applications in the pharmaceutical industry.

It reduces possible metallic contamination.

Other special types of stainless steel are also available, especially those that can resist corrosion of salty water.

UNS S32760, for example, is known to have high impact strength at zero temperature and displays excellent corrosion resistance.

It is cost effective and contains elements of:

  • 25% chromium
  • 7% nickel
  • 6% molybdenum
  • Copper
  • Tungsten

UNS S3276 can be used in desalination plants, seawater systems, etc.

So, what’s the bottom line here?

Stainless steel filter housings are superior accessories you can count on in any piping system.

With these, you don’t have to worry about any possible downtime and extra costs due to corrosion or contamination.

Chapter 3: Classification and Types of Stainless Steel Filter Housing

In this section, I will walk you through different types of stainless steel filter housings.

They come in many shapes and designs, depending on the nature of the application.

Now, let’s go straight to the main subject of this section:

3.1. Stainless Steel Bag Filter Housing

You can also refer to this housing as a bag filter vessel.

It comes as:

  • Single bag filter housing or,
  • Multi-bag filter housing

Normally, stainless steel bag filters allow for high dirt holding capacity.

Besides, they resist adhesion of both dirt on their surfaces.

The best part?

It will ensure minimum downtime in your piping system.

Bag filter housing

Bag filter housing

During filter bag change out, the lids will easily open and close within the minimum time possible.

Besides, its design should have good drainage system on the inlet side and bottom outlet.

Whenever you’re buying a stainless bag filter, it is important to consider the flow rate.

Depending on the need of a bag filter, some companies may manufacture these housings as per the desire of the customer.

Other design features that the stainless steel bag filter manufacturers may offer upon request include:

  • High-pressure rating
  • Special material types
  • Different outlet connections
  • High flow rates
  • Extra stand lengths, etc.

Easy to open bag filter housing

Easy to open the bag filter housing

The stainless steel bag filter housing is made of stainless steel 304, 316 and 316 L.

Its design is such that, the smooth welding finish allows for easy cleaning.

With multi-bag stainless steel filter housing, you can easily maintain a contamination free  fluid system.

Multi bag filter housing

Multi bag filter housing

Its housing gives the best sealing ability and provides a range of filtration capabilities.

This type of bag filter housing is unique and has the following features,

  • Can accommodate high flow rate with a very low-pressure drop
  • It has a filtration precision of between 0.5µm to 200µm
  • Has a positive O-ring sealing which facilitates safe and easy operation
  • Good surface finish which is polished like a mirror to ensure no dirt adheres on the surface
  • Has optimized housing volume to reduce the losses of fluid energy
  • Flexibility in design parameter since both high pressure and pressure are available.
  • Allows for faster filter element changeover
  • Available in different classes of stainless steel, namely; SS304, SS 316 and SS 316 L
  • Its configuration includes a side in/bottom out and side in / side out
  • Working pressure of up to 1.5 Mega Pascal with a temperature of 205 Degree Farads.
  • Available in custom designs for specific applications in industries

With all these features, bag filters can have a wide range of applications such as:

  • Machining industry
  • Textile industry
  • Printing and papermaking industry
  • Oil and gas industry
  • Paint, ink and resin industry
  • Waste water treatment industry
  • Food and beverage industry
  • Pharmaceutical industry, etc.

Although the internal structure of stainless steel bag filter housing may vary, they are made of bag filter vessel, internal support cage and cleanable or disposable filter bags.

The working principle of stainless steel bag filter is simple and straightforward.

That is:

i. Contaminated fluid enters the bag filter through the inlet

          ii. The bag expands due to impact pressure

         iii. Filtration of the fluid occurs through the filter bags

          iv. Filtered fluid leaves the stainless steel bag filter through the housing. Meanwhile, it leaves behind all contaminants in the filter bag.

You can then remove the dirt by opening the stainless steel bag filter housing.

Opening stainless steel bag filter housing

Opening stainless steel bag filter housing

Voila! It’s a simple accessory that plays an integral role in maintaining cleanliness of the pipe systems.

3.2. Stainless steel multi-bag filter housing

Do you remember what I said in section 3.1 of this chapter?

Well, here, I will only highlight some main points about stainless steel multi-bag filter housing.

As the name suggests, this stainless steel filter housing hosts numerous bag filters.

Depending on the design, it can remove particles up to 1 micron.

The good news?

Stainless steel multi-bag filter housing provides an economical bulk filtration.

Stainless steel multi bag filter housing

Stainless steel multi-bag filter housing

You can use multi-bag filters to clean fluids such as coolants, beverages, glues, inks, water, solvents, recycled oil and paints.

Some of the main specifications for stainless steel multi-bag filter include:

i. Standard design pressure of 150psig

ii. Conform to the ASME Section VIII Div .1 & 2 standards

iii. O-ring closure seal provision

iv. Quick access provision

v. There should be 3000lb NPT couplings for drain

vi. Feature vent and pressure gauge connections

vii. Houses less than 305mm (12 inches) should have handles. Those with more than 12 inches should have head lifts

viii. Provision of 150 lb ANSI RF flanged inlet/outlet

Remember, depending on your unique applications; you can specify additional features.

A good manufacturer should be able to design custom stainless steel multi-bag filter housing.

At times, you can use these accessories as strainers. In such situations, they come with a steel basket, which may have mesh linear.

To be used as a filter, there will be perforated steel baskets which are designed to hold cleanable or disposable filter bags.

3.3 Stainless Steel Industrial Filter Housing

There are many types of stainless steel industrial filter housing.

However, for the scope of this section, I will focus on the following:

  • Sanitary filter housing
  • Lenticular filter housing
  • Sock filter housing

Now, let’s review each of these filter housing in details:

i. Sanitary Filter Housing

Sanitary filter housings are made from 304, 316L stainless steel.

They are common in applications that require a high degree of purity such as pharmaceutical, food processing and beverage industries.

These filters come in different designs and configurations with quite a number featuring a securing clamp.

It allows for quick access and high working pressure.

At the moment, sanitary filter housing come in five possible connections and they include:

  • SMS male
  • Triclover
  • But welded
  • DIN
  • Macon

The modern sanitary filter housing come as an assembly, which makes it easy to isolate different components upon request.

Besides, they also feature numerous control auxiliaries such as manometers, sight glass, sterile sample port etc.

They have a cGMP compliant design that is easy to clean and maintain.

You can clean them with water, autoclaved or in-line steam.

You can review the table below to learn more about construction material for sanitary filter housing:

1.Base and the dome316L stainless steel
2.Internal parts316L stainless steel
3.Butterfly valves316L stainless steel
4.Vent316L stainless steel
5.Sampling valve316L stainless steel
6.Dome clamp316L stainless steel
7.Dome O’ RingSilicon

Other critical aspects of sanitary filter housing include:

  • Varying flow rate
  • The maximum working pressure is  15 bars at 90 Degrees Celsius
  • An inlet / outlet connection can be flanged or threaded
  • Drainand vent connections  are offered

Even as you shop for sanitary filter housing, pay attention to the type of cartridge you’ll use in the system.

You should ensure that the sanitary filter housing can accommodate any other standard cartridge style.

ii. Lenticular Filter Housing

The design of this filter housing is such that you’ll mount it in an upright position.

Therefore, during installation, it is important to leave an adequate clearance overhead.

You’ll need this clearance when removing this section of the lenticular filter housing.

To remove the dome safely, you need a fork lift or hoist.

Forklift or hoist can handle a dome with 3 or 4 high housing.

The designs of lenticular filter housing feature a stainless steel and an electro polished sanitary surface.

Lenticular filter housing

Lenticular filter housing – Photo courtesy: Cellar Tek

Normally, the design of this surface is to prevent contaminants from sticking to its surface.

Like other filter housings, this accessory has other auxiliary components such as:

  • Pressure gauges
  • Drain valve
  • Vent valve, etc.

In most cases, a 12 inch 3 high lenticular housing is capable of accommodating 34 filter sheets with 40 x 40 inches each.

This type of filter housing has so many advantages which include the following;-

  • The housing can be loaded with very few filter modules and performance will still be optimal
  • It is very simple to load and maintain since there will be no need for wetting and retightening
  • It has enclosed design which gives good filtration without product losses
  • The vertical design makes it consume very less space compared to other standard plate filters

In this type of filter housing, the filter modules can serve you for a very long time.

It’s because the filter modules can simply be back flushed and re-used many times before replacing with new ones.

The maximum operating temperature of the lenticular filter housing is 284 Degrees Farads or 140 Degrees Celsius.

While the maximum operating pressure of 159 psi or 10 bars liquid pressure.

With these operating parameters, the standard gasket material is silicon.

iii. Sock Filter Housing

Sock filter housing come in different designs and sizes for varying fluid handling capabilities.

They resemble the bag filter housing in their design.

In most cases, these housings are designed alongside the filter bags.

After the manufacturing process, the whole filtration system is tested for filtration efficiency and any compatibility.

The design allows the bag/sock bag filter to work with a wide range of fluid flow rates.

Remember, in industrial setups, the flow rates tend to fluctuate.

Of course, the pressure rating of the sock filter housing also varies depending on the design and type of application.

Bag filter housing

Stainless steel filter housing

The pressure ratings vary, but every standard design must have a pressure rating indicated on the name plates with the ASME code stamps.

Key features of sock filter housing include;-

  • The vessel material of construction is stainless steel (304SS and 316SS)
  • There is varying sizes of the flange connection configurations which may fit the customers’ requirements
  • Has swing bolt to aid in manually lifting of the lid during servicing and cleaning
  • The vessel pressure rating is indicated, normally 150 PSI with ASME stamping well indicated
  • There is an indication of the flow rate capability of the vessel with a capacity of say 15 to 100 Gallon per minute. However, depending on the customer requirement, this can be tailor made.

All in all, the vessel can be constructed depending on the specifications of the customer which may include; gasket material, pipe requirement choice, dimension of the supporting leg and number of bags.

3.4. Stainless Steel Cartridge Filter Housing

Also called cartridge filter vessel, the stainless steel cartridge filter housing is suitable for efficient filtration of liquids and gases, clarification and sterilization.

stainless steel cartridge filter housing

Stainless steel cartridge filter housing

In these filter housings, cartridge removes contaminants from the piping system.

Like other filter systems, the working principle of this accessory is simple and straight forward.

That is:

  • Contaminated fluid enters the stainless steel filter housing
  • It distributes equally around the filter cartridge – from outside to inside
  • It traps contaminants from outside
  • Clean fluid leaves via the outlet

Depending on your unique needs, stainless steel cartridge filter housing comes in different pressure rating, flow rates and dirt holding capacity.

Some of the most common types of stainless steel cartridge filter housing on the market include:

  • Multi cartridge filter housing
  • Single cartridge filter housing
  • Industrial cartridge filter housing
  • 316 stainless steel cartridge filter housing

Depending on the design of these cartridge filter housing, you can use them in food processing, pharmaceutical, cosmetics, beverage and food processing industries, just to mention a few.

Remember, cartridges made of stainless steel are long lasting and are easy to manage thus, cost effective.

Different types of Cartridge filter housing

 Different designs of cartridge filter housing

General features of the stainless steel cartridge filter housing include:

  • Exhibits minimum pressure losses due to optimized flow patterns
  • Made of high grade carbon stainless steel construction (304, 316, 3016L)
  • Smooth interior finish for easy cleaning,
  • Single cartridges, filter housing need to have T-port/in-line, Open/L-port choices.
  • It must have standard fittings such as vent, clean drain and dirt drains and ports for gauge mountings
  • For multi cartridge filter housings, threaded or flange connections are required
  • There is machined cover groove on the gasket to allow for O-ring sealing provision
  • Every cartridge filter housing must pass through hydro test
  • All metallic parts are made of stainless steel(SS304 or SS 316) to be compatible with the working conditions such as chemicals, pressure, and high temperature
  • The exterior of the cartridge housing should be sandblasted or polished while the interior should be pickle passivated to resist corrosion.

All the above features need to be put into consideration when selecting stainless steel cartridge filter housing. Most companies will design the cartridge depending on the customer requirements.

However, the safety standards must conform to the international requirements.

3.5 Stainless Steel Duplex Filter Housing

The design of stainless steel duplex filter housing is to guarantee continuous operation even in the most adverse piping systems.

That is, you don’t have to worry about downtime for replacing and cleaning elements on the duplex filter housing.

Stainless steel duplex filter housing has two stainless steel filter housings with three way changeover valve (can be ball valve or butterfly valve) between them.

This ensures flexibility in the operation.

Stainless steel duplex filter housing

Stainless steel duplex filter housing

With this design, you can easily switch from the dirty filter housing to clean one.

You can learn how this system works here: Duplex Filter and Strainer: The Ultimate Buying Guide.

At the same time, you will service the dirty filter housing.

Basically, this implies that you will have an uninterrupted flow.

With the SS316 and SS304 structure, these stainless steel duplex filter housings are rust resistant.

Even dirt cannot adhere to their surfaces.

Whenever you’re buying stainless steel duplex filter housing, you should consider the following:

  • Maximum flow rate
  • Material the housing
  • Connection type
  • Filtration accuracy
  • Clogging indicator
  • Dirt holding capacity

Furthermore, the design of duplex filter housing is such that they are easy to overhaul, open, wash and change.

Generally, the assembly is simple.

And the good thing about stainless steel duplex filter housing is that it ensures continuous, steady, robust and maximum filtration process.

Now, let me take you through the technical specifications of duplex filter housing.

· Technical Specifications of a duplex filter housing

Because of different working environment, the technical specifications of the duplex filter housing are important considerations to look into.

A reason why its design specification is such that it holds the filter media material intact with compactness.

With high operating pressure, the filtration system is capable of accommodating the solid materials which are flowing inside the liquid and filter them accordingly.

Here is a sample of duplex filter housing technical data.

S/NOParameterExact Measure
1.Flow Rate25 – 7800L/min
2.Temperature300C – 1210C
3.Working Pressure≤2.5 Mpa
4.Connection rangeDN20 – DN300
5.Pressure Loss≤ 0.35 Mpa
7.Supply Power24/48 W, 220V/50W

Other design parameters include:

i. Duplex Filters

You need duplex filters for the duplex filtration processes. Normally, two units are piped with valves together to allow for the continuous use of the unit.

This means that one unit will be on standby while the other unit is in operation. This reduces possible downtime.

ii. Quick Access Covers

The cover is easy to open and close.

Technical drawing of duplex filter housing

Technical drawing of duplex filter housing

This reduces operating costs and time wasting during changeover.

Of course, this cover meets the ASME standards.

iii. Low Profile Design Housing

The housing should be compact and with good space, making it easier to remove the bag filter elements or cleaning.

It also reduces the working height.

This eliminates the possibility of using ladders or working platforms (they can be a safety hazard).

iv. Spring Assisted Covers

This helps in efficient closing and opening of the covers without a lot of effort.

Once the swing bolts are loose, the cover can easily be lifted to open and stopped by the provided cover stop.

3.6. Inline Stainless Steel Housings

Inline stainless steel housings are suitable in oil&gas applications where servicing requires long servicing intervals and straining particles as small as 5 microns.

Inline filter housing

Inline filter housing

Inline stainless steel housings are generally used as process filters to protect pumps, pressure reducers and hydraulic circuits from contamination.

They are fitted after the system pump to better protect sensitive components.

Its features make it very unique from other filters.

Some of its features include;

  • 304/316L stainless steel construction
  • Provision of the integral support core
  • Visual/electrical indicator and bypass valve
  • Bolt-on cover plate
  • Connections for venting and draining

With all these features, inline stainless steel housings can be applied even in high pressure or high temperature situations.

Chapter 4: Filter Housing Selection Guide

Before you buy any filter housing, it is important to consider factors that increase its efficiency and reliability.

To have a good filtration process, you need to know the filtering element you’ll use.

Remember, it is this element that will sit inside the filter housing.

Now, let’s have a quick overview of the main factors to consider when choosing a filter housing:

a) Nature of the Contaminants and medium

It is important to look at the nature of the contaminant and medium before purchasing filter housing.

Some contaminants or medium are corrosive, thus, may react with the material.

Considering the nature of the contaminant during selection will ensure there is compatibility between the contaminant and the material used.

b) Degree of Filtration Needed

Before buying a filtration system, you need to know an estimate size of particulate you intend to remove.

This will not only help you to choose a suitable filter cartridge, but also an appropriate filter housing.

c) Material of Construction

Here, the filter housing is made from stainless steel material.

Where most filter housing manufacturers use either SS 304 or SS 316L.

I hope you remember what I said earlier about these two types of stainless steel material.

Of course, there are filter housings made from different materials such as brass, iron, etc.

However, that’s a subject for another day.

d) Cost Effectiveness

In any piping of fluid systems, you should strive to reduce the cost of operation.

These may range from the cost of repair to downtime.

When you choose stainless steel filter housing, it will obviously serve you for years.

Of course, this also goes hand in hand with choosing a suitable type of stainless steel filter housing.

Please, review chapter 3, to choose the best filter housing that will reduce the cost of your operations.

e) Temperature and Pressure Operating Conditions

Temperature and pressure also determine the design and type of stainless steel filter housing.

Remember, the filter housing must work within a specific pressure and temperature.

Basically, filter housing designed to work at a lower temperature will not work at higher temperature conditions.

The same applies to pressure.

f) Inlet and Outlet Connection

The filter housing needs to have a compatible inlet and outlet connections with the existing systems.

Be clear on this configuration when making an order.

g) Other Technical Specifications

You should check every component and material that makes up the filter housing to ensure they meet the set standards.

Technical data

Technical data

For instance, the O-ring should be silicon material with the entire structure made from stainless steel.

Assess the joints and connection to ensure they meet the correct specifications of your applications.

They should guarantee “zero leakage.”

Also, as you choose the filter housing, you should pay attention to the bag/sock or filter element and other accessories.

But, why should you do all these?

By considering all these aspects, you’ll buy a filter housing that meets the exact specifications of your applications.

Remember, failure to pay attention to these will result in incompatibility issues which can be expensive in the long run.

And this now takes us to yet another important subject – what makes up a filter housing?

Parts of Filter Housing

Well, this yet another important subject whenever you’re selecting stainless filter housing.

And, as you can remember in chapter 3, I did mention that there are many types of filter housing.

This basically implies the number of parts may also vary.

Parts of duplex filter housing

Parts of  stainless steel filter housing

So here, I will only focus on the main parts and components.

Now, some of the main parts and components of stainless filter housing include:

  • Eye bolt or Swing bolt – It helps in quick de-assembly for easy cleaning and servicing.
  • Head and Shell-Is made of 304 stainless steel and is the housing that takes care of all the internal components like the cartridges and pipework. This section also has a pressure gauge.
  • Vent and Drain Plugs- All fabricated from 304 stainless steel
  • Bottom Seat Plates- Fabricated from 316L stainless steel
  • Shell O-ring- which acts as a seal
  • Pressure gauge -This shows the operational pressure at every given time. It acts as part of the filter housing safety measure
  • It also has connection options such which may include flanges and gaskets
  • The filter cartridges are put inside the housing
  • Another safety measure is the release valve for air

As a rule of thumb, always request for the technical manual or data sheet of the stainless steel filter housing.

Here, you will know all parts and components that are unique to the filter housing you’re buying.

Now, let’s move a step further and have a quick overview on how to replace a filter element.

Chapter 5: Step-by-step Guide How to Replace Elements for a Filter Housing

The design of stainless steel filter housing is such that they can serve you for years.

However, at some point, you will have to replace or clean the filter element.

Remember, it is the filter elements that trap contaminants.

And, it is the filter housing that hosts the filter element.

It doesn’t matter whether your stainless steel filter housing hosts:

a) Hydraulic oil filter

Hydraulic oil filter

Hydraulic oil filters

b) Basket filter element

c) Filter bags

d) Water filter cartridge

Basket Filter Element

Basket filter element

In this section, I will take you through a simple and straightforward process on how to replace a filter element.

Let’s dive right in:

Step 1: Opening the Filter Housing

In order to install a filter element, start by removing the element hold down plate by lifting it off the locating pin.

Using a compatible fluid, lubricate the O-ring on the filter open end.

Then carefully slide the closed end of the filter into the perforated cage which is always welded to the tube sheet.

Step 2: Putting the Filter Element in Position

To put the element into its position, press down on the open end of the filter up to the point when the element is in the tube sheet.

This will ensure complete seal between the housing and the filter through the filter O-ring.

During this point, caution should be put in place to ensure the open –end cap is below the tube sheet surface.

Step 3: Reinstall and Secure the Cover

After the entire filter cartridges have been installed, ensure you re-install and secure the hold down plate element.

This is ensured by simply guiding the hold down plate element above the locating pins on the tube sheet.

The hold down plate normally prevents the elements from getting dislodged in any event of reverse flow.

To help in the installation and removal of the filter cartridges, a filter tool is normally provided in every housing.

This tool helps to eliminate any attempt by the operator to open the filter vessel to either install the filters or remove them.

Here is a video that gives an overview of the process:

Remember, this is just a brief summary of the process of replacing or installing a filter element.

Normally, the stainless steel filter system manufacturer will outline the entire process in the manual.

So, you should review the manual.

This is because the process may vary depending on the design of the stainless filter housing.

But one thing that I can assure you is that, the process is simple and straight forward.


As you can see, stainless steel filter housing come as either SS 316(L) or SS304, with dual-phase stainless steel such as UNS S32760 available for special applications.

Also, they come in different designs and shapes.

And more importantly, stainless steel filter housing are resistant to corrosion, easier to clean and durable.

Over the years, FilSon Filters has expanded to be a global leader in manufacturing stainless steel filter housing.

In case you have questions or inquiries on filter housing, feel free to contact us.

We offer free consultations on filtration systems.

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