Self-Support vs Scrim Support
Why Use Scrim Bags?
Scrim bags are essential for longer bag life and lower emissions. The cleaning mechanism of the RF filter differs significantly from the “pulse-jet” and “reverse-air” systems used in other dust filters, which requires a different type of bag.
The RF filter utilizes a high volume of 7.5 – 8 PSI air to generate a powerful shock wave, which travels down the length of the bag to dislodge dust effectively.
The filter bag must be stiff to transmit the RF-generated shock wave and effectively remove dust. If the bag is not stiff, it will absorb the shock energy as it stretches, reducing the energy available to knock off the dust. This results in inadequate cleaning, causing the bags to “blind up,” increase pressure drop, and require frequent replacements.
Contact FabCo Industrial Services for scrim bags and scrim bag support! Please fill out our form here, or give our team a call directly at (800) 473-5251.
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What to Know About Scrim Bags
Advancements in technology have now made possible a fiber supported felt that is equal to and, in most cases, has better performance characteristics than traditional scrim supported felts. Here is additional information and specifications:
- The absence of a scrim means that all of the fibers in the felt are available for filtration. Scrims are so tightly produced that they cannot contribute to normal filtration.
- Scrims can blind easily if dust penetrates into the felt. This can lead to premature failure of the bags from the resulting high pressure differential.
- The absence of a tight scrim means that air can flow more freely, allowing higher velocity or lower pressure drop.
- Scrims affect the flexing characteristics of the felt, so their removal can improve some aspects of the media’s behavior, including allowing easier pulse cleaning.
- Needling tends to weaken scrims, whereas this process strengthens fibers. In most cases this leads to higher overall media strengths.
- In general, fiber supported felts are less expensive than those containing scrims, due to the high cost of producing scrims.
Fiber vs Scrim Support
You may be wondering about fiber versus scrim support. In terms of physical characteristics, the products compare as follows for a 16 Opsy polyester felt. Here is a breakdown of that information:
| Fiber Supported | Scrim Supported | |
| Mullen Burst | 540 PSIG | 400 PSIG |
| Permeability | 40 CFM | 40 CFM |
| Average lbs of force at failure (Longitudinal) | 236.5 | 223.7 |
| Average lbs. of force at failure (Lateral) | 413.3 | 291.6 |
Why Choose FabCo Industrial Services?
FabCo Industrial Services is a trusted provider of high-quality scrim bags and scrim support, designed to enhance the performance and longevity of your systems. When you choose FabCo, you benefit from our commitment to excellence and our extensive industry expertise since we first got started in 1988. At FabCo, we understand the critical role that effective filtration plays in maintaining a clean and safe working environment. Our scrim bags are engineered to deliver superior performance, providing reliable and consistent results.
Trust our team to provide the highest quality scrim bags and support, ensuring your filtration systems operate at peak efficiency and contribute to a cleaner, healthier environment. FabCo proudly serves customers throughout the Fox Valley and beyond!
