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Bag Filter Housings – Reliable Solutions for Liquid Filtration

Bag filter housings are an efficient and cost-effective way to filter liquids across a wide range of industrial and commercial applications. Using a filter bag supported inside a durable housing, these systems trap solid particles as liquids pass through, ensuring reliable filtration at high volumes. Pelmar Engineering offers Fil-Trek bag filter housings in multiple designs from compact single-bag units to multi-bag housings for large-scale operations, giving you flexibility, durability, and performance tailored to your needs.

How Bag Filter Housings Work

  • Inlet Flow: Contaminated liquid enters the housing through the inlet nozzle.
  • Filtration: The liquid passes through a filter bag supported by a perforated basket, which captures suspended solids and debris.
  • Outlet Flow: Clean, filtered liquid exits the housing, ready for downstream processes.
  • Maintenance: When the filter bag reaches capacity, it can be quickly replaced, minimizing downtime.

Key Advantages of Bag Filter Housings

  • High-Volume Capability: Handles large liquid flows with low-pressure drop.
  • Versatile Micron Ratings: Available in nominal and absolute ratings, from coarse pre-filtration to fine polishing.
  • Material Options: Stainless steel, carbon steel, and specialized alloys to suit various chemical and temperature conditions.
  • Quick Changeouts: Easy-to-replace bags reduce downtime and labour costs.
  • Scalable Designs: Choose single-bag housings for smaller systems or multi-bag housings for industrial-scale operations.

Pelmar’s Bag Filter Housing Series

  • BMB Series: Multi-bag housings with bottom-in/bottom-out nozzle design for high-flow applications.
  • HSL Series: Accommodates a single double-length bag filter (#2 size), available in carbon or stainless steel.
  • LP Series: NSF/ANSI 61-certified housings for potable water and multi-purpose use.
  • SL Series: ASME code and non-code single-bag housings for flexibility in regulated industries.
  • TL Series: Top-in, bottom-out design, available in ASME and non-code versions, for straightforward installation.

Choosing the Right Bag Filter Housing

When selecting a housing, buyers should evaluate:

  • Flow Rate: Match housing size to system throughput.
  • Operating Pressure & Temperature: Ensure the housing material and seals are suitable.
  • Filter Bag Material: Polyester, polypropylene, or high-temp options depending on the fluid.
  • Micron Rating: Choose based on the smallest particle size to be removed.
  • Regulatory Requirements: Certified housing may be needed in food, beverage, or municipal applications.

Applications of Bag Filter Housings

Bag filter housings are widely used for liquid filtration in:

  • Water Treatment & Municipal Systems: Removing suspended solids before distribution.
  • Food & Beverage: Filtering syrups, juices, and processing water to maintain product quality.
  • Chemical Processing: Handling corrosive or high-viscosity liquids.
  • Oil & Gas: Filtering fuels, lubricants, and process fluids.
  • General Manufacturing: Protecting pumps, valves, and heat exchangers from debris.

Find the Right Bag Filter Housing for Your Application

Pelmar Engineering supplies the full line of Fil-Trek bag filter housings, from single bag to multi-bag designs. Browse our bag filter housing products or contact us for help selecting the right configuration for your industry.

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FAQs – Bag Filter Housings

Bag filter housings are generally the better choice for higher flow rates and larger volumes because they have a much greater dirt-holding capacity per unit. This means fewer changeouts and lower operating costs. Cartridge filters are often used for smaller systems or precision polishing, while bag filters provide a cost-effective solution when scaling up to industrial or municipal use.

Replacement depends on solids loading, flow rates, and the selected micron rating. In municipal water treatment, bags may last weeks, while in heavy industrial use they may need changing more frequently. The housings Pelmar supplies are designed for quick bag replacement to minimize downtime, and multi-bag housings extend intervals between changeouts.

Yes. Pelmar supplies housings in stainless steel, carbon steel, and specialty alloys to handle a wide range of conditions. Filter bags themselves can be selected in polypropylene, polyester, or aramid to withstand aggressive chemicals, high temperatures, or abrasive particles. This ensures compatibility with industries like chemical processing, oil & gas, and mining.

Yes. Multi-bag housings allow you to process higher volumes with fewer interruptions, reduce labour time, and extend run times between bag changes. They are ideal for operations that cannot afford downtime, such as continuous manufacturing or municipal treatment plants. Single-bag systems, on the other hand, are a good fit for smaller operations or pilot plants where flow is more limited.

The LP Series housings supplied by Pelmar are NSF/ANSI 61 certified, making them suitable for drinking water applications. Stainless steel housings are widely used in food and beverage processing because they are hygienic and compliant with industry standards. Buyers in regulated industries can be confident that these housings meet both safety and performance requirements.