Why JX Filtration Bag Filter Outperforms Others – A Closer Look at Our Welding and Passivation

When investing in industrial filtration equipment, it is easy to focus on the initial purchase price. However, the true cost of ownership is determined by reliability, durability, and after‑sales support. At JX Filtration, we believe that a lower price tag often comes with hidden compromises – in materials, workmanship, and service. That is why we never cut corners. Our commitment to quality and client service ensures that our clients receive equipment that performs consistently, lasts longer, and delivers superior return on investment.
One of our flagship products is the bag filter housing. In this article, we would like to share some of the key engineering advantages that set our bag filters apart from the competition.

Superior Welding Technology – The Foundation of Durability

Stainless steel’s corrosion resistance relies on a continuous passive chromium oxide film on the surface. However, many manufacturers use poor welding techniques that lead to:

• Burn‑through defects during welding,
• Oxidation of the weld zone due to high heat input,
• Loss of alloying elements (especially chromium) in the base metal, resulting in a chromium‑depleted layer,
• Formation of loose iron oxides that destroy the protective passivation layer.

When such defects occur, even 304 or 316 stainless steel loses its corrosion resistance in the affected areas. In service, these weak points become prone to pitting, rust‑through, and eventual leakage – drastically shortening the equipment’s useful life.

Our Approach – Full Penetration Welding and Inert Gas Shielding

At JX Filtration, we take a completely different approach:

• Double‑sided full penetration welding – we weld both the inside and outside of every joint. This eliminates burn‑through and oxidation, because we use argon gas shielding throughout the entire welding process to protect the molten pool.
• Our welds are smooth, uniform, and aesthetically pleasing on the outside – but more importantly, they are structurally sound on the inside.
• We do not stop at easy‑to‑reach areas. Every internal corner, tight spot, and hard‑to‑reach joint is fully welded – no gaps, no shortcuts. This ensures that there are no hidden weak points that could later cause corrosion or failure.

The result? A bag filter that looks good on the outside, but when you open it up, you truly see the value – clean, continuous welds everywhere, and no untreated surfaces.

Acid Pickling and Passivation – An Extra Layer of Protection

Even the best weld can have a thin layer of oxide and scale. That is why we go one step further: all internal surfaces and welds are thoroughly acid‑pickled and passivated after fabrication. This process:

• Removes oxidation scales, weld slag, and any damaged surface layers,
• Restores a clean, uniform chromium‑rich surface,
• Generates a dense and continuous passive film that effectively resists corrosive media.

With this treatment, the entire filter, especially the weld zones, achieves maximum corrosion resistance – far exceeding the performance of non‑passivated equipment.

Proven Longevity – 3 to 5 Years Longer Service Life

Our commitment to quality has been validated in the field, particularly in demanding industries such as copper foil manufacturing, where corrosion resistance is critical. Over years of practical use, JX Filtration bag filters have consistently outlasted competitors’ units by 3 to 5 years.
For equipment made of higher‑grade alloys (e.g., 316L and above), the difference is even more pronounced. Our clients regularly report that our filters remain leak‑free and fully functional long after rival products have been replaced.

Choose Value, Not Just Price

Purchasing a bag filter is a long‑term decision. A cheap upfront price often means costly downtime, frequent repairs, and premature replacement. At JX Filtration, we deliver not only high‑quality equipment but also comprehensive technical support and a partnership approach that ensures your operations run smoothly.
We invite you to consider the total cost of ownership – and see why discerning clients worldwide choose JX Filtration for their bag filter needs.