Xinxiang Filter

Description:
Polyester filter cartridges are installed in pulse backblow welding fume purifiers to capture metal oxide fume and fine particles generated by welding processes including MIG/MAG, TIG and manual arc welding. During welding, welding rods or wires melt with base metals under high temperature and produce massive fine fume particles of 0.1–5μm, which contain hazardous metallic components such as chromium, nickel and manganese. Long-term inhalation will cause severe damage to operators’ respiratory systems.

Made of pleated polyester filter media, the cartridge features excellent fiber wear resistance and high filter velocity, with dust removal efficiency exceeding 99.9%.

Core Technical Advantages:

High-efficiency filtration for compliant emission: The multi-layer gradient polyester media achieves over 99.9% filtration efficiency for welding fume particles of 0.3–5μm, and outlet emission concentration can be controlled below 10mg/m³ to meet GB 16297-1996 national environmental discharge standard. Optional PTFE membrane coating upgrades filtration precision to 0.3μm with efficiency ≥99.95%.

High-strength structure resistant to pulse impact: The inner and outer supporting frames adopt high-strength galvanized perforated steel sheets with thickness above 0.7mm, delivering high collapse resistance. It prevents cartridge rupture, bursting or collapse under repeated impact of high-pressure pulse airflow (0.4–0.6MPa).

Working Condition Matching Table:

Application Fields:

Welding fume abatement

Dust collection for metal processing

Fume treatment for laser cutting & plasma cutting

Dust removal for sandblasting & shot blasting

Dust control for casting workshops

Case & Data Verification:

We renovated the dust removal system for the welding workshop of an auto parts manufacturer by replacing ordinary cartridges with PTFE membrane polyester filter cartridges. After replacement, the workshop fume concentration dropped from 3.5mg/m³ to 1.2mg/m³, exceeding national standards, and the fan operating current decreased by 15%.

FAQ:

Q1: How to choose between polyester filter cartridges and PTFE membrane cartridges?
A: Standard polyester cartridges with cost advantages are suitable for ordinary carbon steel welding. PTFE membrane versions are recommended for stainless steel, aluminum alloy welding or ultra-low emission requirements. PTFE membrane features water & oil repellency for thorough ash cleaning and ≥99.95% filtration efficiency, yet at a higher price.

Q2: What is the service life of filter cartridges?
A: Under normal working conditions, polyester filter cartridges serve around 3500–6000 hours (1–2 years, subject to operating load and fume concentration). PTFE membrane coating extends service life by 20–30%.

Q3: How to judge when filter cartridges need replacement?
A: Judgement mainly relies on pressure differential across the cartridge: initial pressure drop for clean cartridges is about 120–150Pa. Replace the cartridge if pressure drop cannot fall back to within 1.5 times the initial value after pulse cleaning. Visual inspection for severe surface clogging or damage is also available.

Q4: Can polyester filter cartridges be used in humid environments?
A: Polyester media has basic moisture resistance, yet filtration performance will decline under long-term high humidity (>85%RH). Optional waterproof PTFE membrane cartridges with oil & water repellent properties are applicable for humid working conditions.