Description:
High-temperature resistant filter cartridges are mainly used for treating high-temperature fume generated during high-power laser cutting (≥6kW) of thick plates, as well as filtration in high-temperature zones close to heat sources inside dust removal systems of laser cutting equipment. They are widely applied in high-temperature industrial fume control fields including high-power laser cutting, plasma cutting, casting and smelting.
Fume temperature can reach 100–200℃ during high-power laser cutting, far exceeding the temperature resistance limit (80–120℃) of ordinary polyester filter cartridges. Manufactured from high-temperature resistant filter media, high-temperature resistant cartridges fall into the following main types:
PTFE Membrane + High-temperature Substrate: Temperature resistance 150–200℃
Fiberglass Filter Media: Temperature resistance 200–300℃
Aramid (Nomex) Filter Media: Temperature resistance up to 200℃, suitable for pulse cleaning systems
Ceramic Fiber Filter Media: Temperature resistance above 600℃, for extreme high-temperature working conditions
Core Technical Advantages:
Graded temperature resistance for different working conditions: Multiple temperature resistance grades available to match diverse operating demands:
Standard Temperature-resistant Type: Continuous operating temp ≤120℃, instantaneous peak ≤150℃ (PTFE membrane polyester)
Medium-temperature Type: Continuous operating temp 150–200℃, instantaneous peak ≤220℃ (Aramid / PTFE composite)
High-temperature Type: Continuous operating temp 200–300℃, instantaneous peak ≤350℃ (Fiberglass / Ceramic fiber)
Stable structure under high heat: High-temperature resistant adhesive and sealant ensure firm bonding between end caps and filter media without debonding in hot environments. Metal frames and end caps are made of stainless steel to avoid oxidation and corrosion under high temperature. Fiberglass and ceramic fiber media feature inherent non-flammability and thermal stability.
Stable high filtration efficiency without attenuation at high temperatures: PTFE membrane maintains intact micropore structure under heat, delivering ≥99.9% filtration efficiency for particles of 0.3–0.5μm. Fiberglass deep-bed filtration achieves precision of 0.5–5μm with efficiency ≥99.5%.
Surface filtration with excellent ash cleaning performance: PTFE membrane enables surface filtration that prevents dust from penetrating deep into media. Complete ash cleaning and high pressure drop recovery rate are maintained even under high-temperature environments.
Working Condition Matching Table:
| Working Condition | Fume Temperature | Recommended Material | Temp Resistance | Filtration Precision | Application Scenarios |
| High-power Laser Cutting (6–10kW) | 80–120℃ | PTFE Membrane Polyester | 120℃ / 150℃ | 0.3–0.5μm | Thick Carbon Steel / Stainless Steel Plate Cutting |
| Ultra-high-power Laser Cutting (10–20kW) | 120–150℃ | Aramid (Nomex) + PTFE | 200℃ / 220℃ | 0.3–0.5μm | Extra-thick Plate Cutting |
| Thick Plate Plasma Cutting | 100–180℃ | Fiberglass + PTFE | 200–260℃ / 300℃ | 0.5–1μm | Thick Plate Plasma Cutting |
| Casting / Smelting Flue Gas | 150–250℃ | Fiberglass | 260℃ / 300℃ | 1–5μm | High-temperature Process Dust Removal |
| Laser Cutting of Castings / Ceramics | 200–300℃ | Ceramic Fiber | Above 600℃ | 1–5μm | Special Material Processing |
| Heat Treatment Furnace Flue Gas | 180–250℃ | Fiberglass / Aramid | 200–260℃ | 1–5μm | Heat Treatment Workshops |
| Integrated Laser Cutting & Annealing Line | 150–200℃ | Aramid (Nomex) | 200℃ | 0.5–1μm | Integrated Production Lines |
Application Fields:
Fume treatment for laser cutting of thick carbon steel and stainless steel plates
Fume control for combined laser cutting & welding processes
Flue gas dust removal for casting workshops
Flue gas purification for smelting and electric furnaces
Flue gas treatment for hot-dip galvanizing and heat treatment workshops
Dust collection for laser cutting of ceramics and composite materials
Fume treatment for metal 3D printing
Fume purification for laser welding and laser cladding
FAQ:
Q1: How to confirm if high-temperature resistant filter cartridges are required for working conditions?
A: Measure fume temperature at dust collector inlet:
Below 80℃: Standard polyester cartridges are sufficient;
80–120℃: Standard temperature-resistant type (PTFE membrane polyester);
120–200℃: High-temperature resistant cartridges (Aramid / Fiberglass) are mandatory;
Above 200℃: Flue gas cooling equipment or ceramic fiber cartridges shall be adopted;
Online temperature monitoring devices are recommended for real-time temperature tracking.
Q2: How to choose between aramid (Nomex) and fiberglass media?
A: Aramid: Resists up to 200℃, excellent folding resistance, ideal for pulse cleaning, moderate tolerance to acid gases;
Fiberglass: Withstands 260–300℃, superior acid & alkali resistance yet poor folding resistance; pulse cleaning parameters need careful design;
Aramid with PTFE membrane is preferred for laser cutting fume to balance temperature resistance and ash cleaning performance.
Q3: Do high-temperature resistant filter cartridges require special ash cleaning parameters?
A: Yes. High-temperature resistant cartridges (especially fiberglass ones) have weak folding resistance. Guidelines for pulse cleaning:
Avoid excessive pulse pressure (0.4–0.5MPa recommended); appropriately shorten pulse width;
Set cleaning frequency reasonably based on pressure differential;
Prevent media fatigue damage caused by over-cleaning.
