Filter housings

Filter Housing for Liquid Filtration

Filter housings are a crucial component in many industries where filtration of liquids is necessary. These devices enclose filter cartridges, baskets or bags and hold the filtration media in place, ensuring that liquids are purified effectively. In this guide, we will explore different types of filter housings, their uses, and how to choose the right filter housing for specific needs.

What is a Filter House?

A filter housing is a casing that encloses a filter cartridge, basket, or bag and holds the media in place. They are available in many different configurations and designs to best suit different filtration needs.

Types of Filter Housings

1. Inline filter housings: These are designed to be installed directly into the pipeline and often feature a stainless steel mesh basket that can retain particles down to 50μm.
2. Body Filter Housings: Used to capture larger particles and are suitable for applications with high flow rates and pressures.
3. Cartridge filter housings: Contain replaceable filter cartridges and are ideal for precision filtration where high purity is required.
4. Bag Filter Housing: Uses filter bags that are easy to replace and are cost-effective for high-volume applications.

Choosing the Right Filter Housing

To choose the right filter housing for your application, you should consider the following factors:

1. Flow rate: Determine the maximum flow rate that the system needs to handle.
2. Temperature: Choose materials that can withstand the temperatures that the liquid will have.
3. Pressure: Ensure that the filter housing can handle the maximum operating pressure.
4. Filtration Rate: Select the filter housing based on the particle size that needs to be removed.
5. Chemical compatibility: The material of the filter housing must be compatible with the chemicals being filtered.
6. Maintenance: Consider how easy it is to change filters and maintain the system.

PED and CE marking

All our filter housings are certified according to the Pressure Equipment Directive (PED) and have the CE marking. This means that they meet the strict safety requirements for design, manufacturing and testing required within the EU. The PED certification ensures that the filter housings are safe to use under pressure and that they have undergone the necessary assessments and tests to meet these requirements.

How does a Filter House work?

The liquid enters from the inlet nozzle, passes through the filter media, extracts the contaminants, and flows out from the outlet nozzle.

Factors Affecting the Size of the Filter Housing

Efficiency, flow rate, filter change frequency, amount and nature of contaminants.

Coatings for Filter Houses

Electropolishing, passivation, pickling, galvanizing and blasting.

Types of Filter Housings

• Y- and T-strainer
• Cartridges
• Valves
• Polypropylene
• Polyvinyl (PVC) cartridges
• Self-cleaning
• PVC Bags
• Molded baskets

Applications for Filter Housings

Refineries, water treatment, chemical production, oil and gas, pharmaceuticals, food and beverage, power plants, textiles and paints, inks and dyes, RO prefiltration, and process industries.

Choice of Filter Housing

Compatible ports, mounting processes, pressure ratings, drainage options, flow rate, operating temperature, configuration requirements, housing material, and cost.

Construction Types of Filter Housings

• Horizontal: Bulky, large filtration area, high flow, low pressure drop.
• Vertical: Standard construction, suitable for small spaces.

Material for Filter Housing

Carbon steel, mild carbon steel, medium strength steel, high carbon steel, stainless steel (304 and 316), plastic, PTFT and aluminum.

Features of a Good Filter House

Large filtration space, efficient separation, compatibility with process requirements, resistance to process conditions, high-quality surface treatment, free of cracks, easy maintenance, tough material, low pressure.

Factors Affecting Filter Housing Efficiency

Maintenance, fluid type, housing material, installation and operating parameters (pressure, temperature, flow).

Cleaning the Filter Housing

Clean with warm soapy water and brush, rinse and disinfect with bleach, inspect for leaks.

Maintenance of Filter Housing

Check for cracks, leaks, gaskets and O-rings, prevent thread damage, use lubricant, proper cleaning, open shut off system, discharge fluid and pressure before opening, take precautions against toxic gas, keep drain closed after servicing.

Duplex vs Simplexa Filter Housing

Duplex filter housings allow for continuous filtration and reduce downtime by joining two simplex filter housings with a three-way valve.

Quality criteria for Filter Houses

Manufacturing in accordance with the ASME Code, Pressure Equipment Directive 2014/68/EU, CE marking, 3-A sanitary standard, FDA, EPA and cGMP.

Stainless Steel in Filter Housing

Can withstand high pressure, easy to clean, aesthetic, corrosion-free, does not deform under rigorous temperature status. usually 304 & 316L are used.