GORE^® Low Emission Filter Bags

Though each of our standard filter bags is proven to capture up to 99.99% of emissions, we have a new product especially effective at helping plants comply with strict regulations like NESHAP in the cement industry.

GORE® Low Emission Filter Bags have a PTFE-based seam tape that makes it virtually impossible for dust to leak through the stitch holes. Studies show that emissions spike with each pulse of your cleaning system. Our Low Emission Filter Bags don’t let dust through despite the constant pulsing — eliminating those emissions spikes, reducing your baseline emission level, and even extending bag life.

As the industry has evolved, other filter bags have adopted membrane-based seam tape on their filters and technologies — but the Gore membrane remains ahead of the curve. Other seam tapes tend to crack and split during pulsing, eventually exposing stitch hole leak paths after 12–18 months. Our proprietary membrane remains mechanically robust, keeping emissions under control for the life of your filter bags while increasing your total amount of dust collection.

Emissions control is a hot topic in the cement industry. Cement plants are driven by throughput, but if they fail to comply with the new NESHAP (National Emission Standards for Hazardous Air Pollutants) regulations, production could be stopped immediately, introducing a slew of cost factors that affect plants’ bottom line.

What’s more challenging for cement plants is how compliance is calculated: with the MACT (Maximum Achievable Control Technology) approach, which sets compliance limits in line with the top 12% of plants. Plant compliance is calculated not at a given moment, but on a 30-day rolling average.

Prior to NESHAP, plants had to prove their compliance based on annual tests. The MACT approach to setting the new limit at the average of the best 12% is a significant change.  What makes the change even more challenging are plants having to now prove their compliance on a continuous 30-day rolling average.

This is why cement producers around the globe trust GORE Low Emission Filter Bags. Once installed, our bags remain reliable, providing unconstrained operations while keeping plants comfortably and continuously compliant. In addition, Gore’s system approach to filtration process optimization includes our technical support for the lifetime of the filter bags.

GORE Low Emission Filter Bags: Durable seam-sealing technology for the most challenging particle capture applications

When filter bags are sewn, the stitch holes create tiny holes, which can become a path for extremely fine or free-flowing particles. For applications in which this small level of emissions is unacceptable, Gore has developed GORE Low Emissions Filter Bags. Each bag features a PTFE-based seam tape covering all seams where the filter bag has been sewn, covering all the stitch holes and preventing emissions from leaking through.

When exposed to high temperatures and harsh chemicals, other PTFE tapes will often peel or crack, sometimes making the problem even worse.  Our patented seam tape stays intact and in-place, typically lasting for the life of the filter bag.  This truly innovative technology serves our customers well in applications such as these:

• maximizing capture of high value ($/kg) particulates
• maximizing capture of very fine or free-flowing particulates
• meeting stringent emissions regulatory limits
• contamination sensitive applications