What Is a Sanitary Filter Housing And How Does It Work?

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In the medical, food processing, pharmaceutical and other industries, the requirements for hygiene and quality are very strict. In these industries, there is a need for equipment that filters the air and keeps it clean, so Sanitary Filters and Sanitary Tank Filter have been created.

You may have heard of filter housings, but do you know how the Sanitary Filters used in the pharmaceutical and food industries remove particles and impurities? Next SANITEK takes you through everything you need to know about Sanitary Filters.

What Is a Sanitary Filter Housing

What is a filter housing?

The filter housing is the outer shell that surrounds the filter cartridge, filter bag or filter basket. Filter housings come in different sizes and styles.

Common filter housings are:

  • Cartridge Filter Housings
  • Assembled Filters
  • Cast Basket Filter
  • Bag Filter Housings
  • Pvc Cartridge Filter Housing
  • Pvc Bag Filter Housing
  • Polypropylene Filter Housings
  • Vent Filter

The design of the filter housing depends on the following factors:

  • Flow Rate
  • Operating pressure
  • Operating temperature
  • Filtration Grade
  • Total Suspended Solids (TSS)
  • Cost
  • Operating Time
  • Mode of operation (batch/continuous)
What is a filter housing

What Is a Sanitary Filter?

A sanitary filter, also known as a high-efficiency air filter, is a device used for air filtration and purification. Its main function is to filter out harmful substances and microorganisms from the air, thus making the air hygienic, and also reducing the risk of air pollution and spreading diseases.

What Is a Sanitary Filter

How Does a Sanitary Filter Work?

The sanitary type filter adopts the filter principle consisting of multi-layer fiber cloth or filter paper to purify the air by filtering particles, microorganisms and gaseous pollutants in the air.

It works by utilizing the microscopic pores of the filter material to separate the pollutants in the air, thus achieving the purpose of filtering and purifying the air.

Fluid enters through an inlet nozzle in the housing, which directs the fluid to a filter cartridge or bag that is placed inside. The filter cartridge separates the contaminants from the fluid. After this process, clear fluid flows out of the outlet nozzle.

Sanitary filters are available in different filtration sizes and can be categorized into classes F5-F9. Among them, the F9 grade is capable of filtering air particles with a diameter of 0.3 micrometers to achieve the highest purification effect and is widely used in the fields of medicine and food production.

Application Of Sanitary Filters

Sanitary-type filters are mainly used in food processing, pharmaceutical, medical, electronic and other fields.

Among them, in the electronics industry, high-efficiency filters are widely used to reduce the impact of dust, bacteria and other pollutants in the production process, and reduce the rate of product defects.

At the same time, it can also be widely used in operating rooms and other occasions that require air purification to ensure the health and safety of patients.

Understanding The Types Of Sanitary Filters

As an industry pioneer, Sanitek offers filter housings for a variety of applications. Our filter housings are compact in design and are true space savers.

We offer filter housings to handle a wide range of fluids at a variety of flow rates. Filter housings consist of a housing, filter element, end connections, tube plates or O-ring, and gaskets.

Filter housings are commonly used to obtain the required filtration in almost all food and beverage and biopharmaceutical applications.

304 And 316 Stainless Steel Filter Housings

Stainless steel filters are most commonly used in water, food and human contact applications such as lotions and cosmetics. Our stainless steel material options include SS 304 and 316, both of which offer their own unique qualities.

304 stainless steel offers good corrosion resistance and is easy to sanitize. 316 stainless steel offers enhanced strength and easy maintenance.

Both stainless steel materials are available in the following filter housings:

304 And 316 Stainless Steel Filter Housings

Sanitary Metal Filter Housings

These housings are used with filter elements in liquid processing lines to filter contaminants and minimize bacterial growth in food and pharmaceutical plants and other sanitary environments.

They are made of 316 stainless steel that will not corrode from frequent cleaning with harsh detergents.

They feature a self-draining design, rounded edges and highly polished surfaces that leave no room for liquid retention or bacterial growth.

These housings are attached to the line with sanitary quick-clamp fittings for fast disassembly and cleaning, and EPDM rubber gaskets maintain a tight seal and are resistant to water, cleaning agents, chemicals, and steam.

Gaskets are FDA-compliant for direct food contact. Housings are certified to 3-A sanitary design standards and meet FDA standards for pharmaceutical device design.

Cartridge filters have pleats that create a large surface area to trap debris. They have an open end with an EPDM rubber O-ring and locking tabs that form a tight seal to ensure the liquid is filtered through the cartridge, while the locking tabs help align the cartridge for a secure fit.

The cartridges are FDA-compliant for direct food contact.

Sanitary Metal Filter Housings

Sanitary Metal Filter Housings with Cartridges for Food and Beverage Steam Lines

Remove food contact contaminants, moisture and other particles from steam for final filtration in pharmaceutical, biotechnology and electronic applications.

The cartridges in these housings remove 98% of particles down to 1 micron and 100% of particles down to 2 microns. That’s why they meet 3-A recognized practices for the production of culinary-grade steam.

This steam is commonly used in steam-in-place (SIP) cycles to sterilize equipment, as well as for applications such as hot ironing. They are FDA-compliant for direct food contact and also meet pharmaceutical device design standards.

All are made of 316 stainless steel, so frequent cleaning with harsh detergents and sanitizers won’t corrode them, and they can withstand steam.

They have rounded edges and highly polished interior and exterior surfaces to minimize spots for bacterial growth. For the same reason, they have no horizontal ledge – liquids drain completely.

They attach to your line with two quick-clamp fittings that are easily removed for cleaning and line reconfiguration. Each fitting is tightly sealed with an EPDM gasket for excellent vapor resistance.


Sanitary-type filters and sanitary respirators are designed and developed to safeguard people’s health in specific areas with a wide range of process principles and applications.

Many research organizations continue to develop and refine these devices to make them better suited to people’s increasing health and environmental awareness.

Sanitek offers filter housings for a variety of applications. Our filter housings are compact in design and are real space savers. We offer filter housings for handling a wide range of fluids at various flow rates.

If you are still not sure which sanitary filter to choose, contact our filtration experts and we will give you the most satisfactory filtration solution within 24 hours.

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