Xinxiang Filter

Description:
Flame retardant filter cartridges are mainly used for filtration in processes such as carbon steel and galvanized sheet welding that produce splashing sparks. During welding, high-temperature molten metal splashes into the dust removal system in the form of tiny spark particles. If the filter media lacks flame retardancy, sparks may ignite dry dust accumulated on the cartridge surface, resulting in burnt filter cartridges at minimum, or dust collector fire and even explosion in severe cases.

Flame retardant filter cartridges are manufactured by adding flame retardants to polyester fiber substrates or adopting flame retardant fibers followed by post-flame-retardant treatment. They reach Grade B per GB/T 5445-2014 (afterflame time ≤5 seconds) or UL94 V-0 rating, which can effectively block flame spread and self-extinguish upon open flame exposure.

Core Technical Advantages:

Authoritative flame retardant certification for reliable fire safety: The media undergoes dedicated flame retardant post-treatment and meets GB/T 5445-2014 Grade B standard, featuring afterflame time ≤5 seconds without molten droplets under open flame.

Uncompromised physical properties: Flame retardant treatment does not impair the original physical performances of media including tensile strength and air permeability. The fiber retains excellent wear resistance and high filter velocity, and can still be coated with PTFE membrane after flame retardant finishing.

High-precision filtration integrated with safety: With optional PTFE membrane coating, it achieves filtration precision of 0.3–1μm, ≥99.95% efficiency against metal oxide particles in welding fume, and outlet emission concentration ≤10mg/m³.

Working Condition Matching Table:

Application Fields:

Dust removal for metal welding

Fume treatment for plasma cutting

Spark-generating laser cutting

Dust collection for grinding & derusting

Flue gas treatment for casting pouring

Dust control for sandblasting & shot blasting

Flue gas purification for electric arc furnaces

FAQ:

Q1: Can flame retardant filter cartridges completely prevent fires?
A: No. Flame retardant cartridges will not burn or support combustion when contacting sparks, yet they cannot withstand sustained open flame baking. Spark arrestors must be equipped as the first line of defense, while flame retardant filter cartridges act as the second safety barrier.

Q2: Will flame retardant treatment reduce filtration efficiency?
A: No. The flame retardant agent coats fiber surfaces without altering internal fiber structure or pore size distribution. PTFE membrane coating can still be applied afterward, maintaining 0.3μm filtration precision and ≥99.95% efficiency.

Q3: What is the service life of flame retardant filter cartridges?
A: Around 8–12 months under normal working conditions, equivalent to standard polyester cartridges. Frequent spark impact causes partial media aging, so regular inspection is required. For heavy spark scenarios, pre-sedimentation chambers or cyclone separators are recommended to reduce cartridge load.