HHH Filter media Inc. wil provide you a detailed step-by step methode to help you to specify your owned filter bags.
Step. 1 MATERIAL SELECTION(choose the right filter media for your application)
You should choose the right filter media from which your filter bags will be constructed based on the type of application they will be used for. Choosing the correct filter media is an important and sometimes difficult process. To assist you in the identification of the right media for your bags, keep the following in mind:Filter bag performance is directly related to how well it can tolerate the environment in which it is being used, how efficiently it can remove the dust particles and it’s ability to clean and renew.You must first learn to identify the type of filter media currently used in your application. When choosing a filter material you must consider cost, particle size, operating temperature, and chemical resistance.Below is a list of available materials and their specifications to help you decide.Please contact us if you still have questions or would like assistance selecting the best material for your application.
Polypropylene Felt
This non-woven material is our popular workhorse. Polypropylene offers excellent chemical resistance. Its cost effectiveness makes it ideal for applications up to 200° F. This felt material can come plain (untreated felt) or glazed (high heat applied to exterior surface fibers).
Polypropylene Mesh
Similar to nylon mono filament mesh, polypropylene mono filament mesh has better acid resistance than nylon and is more cost effective for temperatures up to 200° F.
Polypropylene Microfiber Felt
This material is grown from raw microscopic fibers. Its long life and ultra-fine micron rating make it possible to use bag filters for applications that once required expensive high maintenance cartridges. Its oil absorbing properties make it ideal for removing trace lubricants from water based products.
Polyester Felt
Polyester has a higher melting point than polypropylene making it ideal for hot oil and other applications up to 325° F. This felt material can come plain (untreated felt) or glazed (high heat applied to exterior surface fibers.
Polyester Mesh
This popular multi-filament mesh is low in cost and ideal for removing particles too large for felt material.
Nylon Felt
Nylon felt is commonly used for high temperature cooking oil applications.
Nylon Mesh
This monofilament mesh is a woven material in which each thread is a single filament. This material's strength enables it to be used in a variety of different applications.
Nomex® Nylon Felt
For extreme high temperature environments Nomex® is the material of choice. Its high price makes it unsuitable for less demanding applications.
Step. 2 MEASUREMENTS (get accurate measurements for optimal performance)
Most dust collectors have been upgraded over the years due to the need for new permits which called for reconfiguration of the bag house in which case OEM configurations will have changed. Because of this you will need to obtain accurate measurements for your filters before ordering replacement filter bags.If you currently have filter bags installed that are functioning properly, you can pull out one of those bags to get the proper measurements for your replacement order. (spare bags not yet used can also be measured if available) If you are removing a used bag to measure, please be sure to use all necessary precautionary measures set in place prior to removal (i.e. gloves, protective garments, & respiratory equipment if needed) It is best not to pull the numbers off the unit because of possible changes to the configurations.
Step. 3 TOP & BOTTOM CONSTRUCTION (of the filter bag play can determine its efficiency)
The top and bottom construction of a filter bag involves a variety of possible configurations. The type of cleaning process used by the dust collector determines which configurations will be used in the design of the filter bag. The most common types of dust collectors are "Pulsejet" "Shaker" "Reverse Air". The chart below can help you identify which type of dust collector filter you use.
TOP CONSTRUCTION
- Snap Band
- Raw Edge
- Compression Band
- Loop Top
- Grommet Top
- Cap Top with Hook
- Corded Cuff with Clamp |
YPICAL BOTTOM CONSTRUCTION
- Corded Cuff with Clamp
- Double-Beaded Snap Ring
- Compression Band |
Step 4 - Additional Options
Ground Wires - Use to comply with Factory Mutual requirements for static dissipation. Ground wire can be made from stainless steel or copper however this technique only works on a localized area of the filter. For optimal static dissipation look at conductive fiber filter made with Epitropic or Stainless Steel fibers.
Wear Cuffs - Used to combat abrasion at the bottom of the bag either from sandblasting of the bags or bag-tobag abrasion due to turbulence in the bag house. Usually 2 to 4 inches in length and made of a material similar to that of the body of the filter bag.
Special Finishes - There are many finish options that can be added to the filter media at the time it is manufactured. Please refer to the materials selection area for further details.
Step 5 - Dust Collector Filter Configurations |
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FAQ for HHH Filter Baq & dust Bags