Description:
Flanged flame-retardant antistatic filter cartridges are fitted with flanges on end caps. They are pressed against the flange face of the equipment filter chamber via bolts or clamps, with a sealing gasket sandwiched in between to form an airtight connection. Featuring ultra-reliable sealing performance, this interface type suits large-size, high-wind-pressure filtration systems and vacuum working conditions, and is widely applied to mid-generation SLM 280, EOS M400 and large custom-built equipment.
This filter media undergoes composite flame-retardant and antistatic treatment, reaching UL94 V-0 flame retardancy grade with surface resistance ≤10⁹Ω. Compliant with EN 1822 standard, it achieves H13-H14 filtration grades with filtration efficiency of ≥99.95%–99.995% for 0.3μm particles and initial resistance ≤250Pa. The optional all-stainless steel structure fits high-temperature processes such as EBM.
Core Technical Advantages
Reliable sealing via flange connection: Bolts or clamps compress the sealing gasket on flange faces to form surface sealing with large sealing area and even clamping force, minimizing leakage risks for high-vacuum or high differential pressure systems.
Dual safety protection: Dual safeguards of nano flame retardants and embedded conductive fibers deliver V-0 flame retardancy (afterflame time ≤10 seconds) with stable surface resistance ranging from 10⁶ to 10⁹Ω. It is particularly suitable for printing high-risk materials including aluminum and magnesium alloys.
Stainless steel mesh outer protective layer: An outer stainless steel mesh promptly dissipates accumulated static electricity to prevent spontaneous combustion triggered by static buildup during filter replacement. It also protects filter media, boosting cartridge rigidity and service life.
Strong capability for large-size customization: The robust flange structure enables manufacturing of oversized filter cartridges compatible with large-format machines such as EOS M400 and SLM 800, as well as centralized exhaust systems.
Optional high-temperature and corrosion-resistant configuration: An all-stainless steel structure lined with PTFE membrane paired with high-temperature flame retardants is available, applicable to high-temperature EBM processes and corrosive gas environments.
Application Fields
Large-Format / High-Performance Metal 3D Printing Equipment:
Mid-Generation SLM 280 (Flanged Interface)
Large-Size EOS M400 Equipment
Custom Large-Format 3D Printing Equipment
EBM Electron Beam Melting Equipment
Printing Materials with Strict Safety Requirements:
Mass Production of Aluminum Alloys
Magnesium Alloy Components
Titanium Alloy Aerospace Parts
Centralized Filtration Systems:
Shared Exhaust Systems for Multiple Machines
Central Dust Extraction Units for Printing Workshops
Case & Data Verification
Case: Application of Flanged Flame-Retardant Antistatic Filter Cartridges in an Aerospace Manufacturer
An aerospace manufacturer adopted mid-generation SLM 280 equipment to print aluminum alloy aerospace components equipped with flanged H13 flame-retardant antistatic filter cartridges. The flatness of flange sealing faces passed inspection, and no leakage was detected via PAO leak test after installation. The filter reached V-0 flame retardancy grade (0 second afterflame) with surface resistance of 5.2×10⁸Ω. The cartridge remained intact after 2000 hours of continuous operation, and the printed parts obtained aerospace certification.
FAQ
Q1: How to select sealing gaskets for flanged filter cartridges?
A: Nitrile rubber or silicone flat gaskets are recommended for normal-temperature working conditions; fluoroelastomer or graphite composite gaskets are required for high-temperature environments (>100°C); O-ring sealing structures are preferred for vacuum systems.
Q2: Are there specified tightening torques for flange bolts?
A: Yes. Tighten bolts diagonally and evenly to the torque specified in the equipment manual to avoid damaged gaskets or deformed flanges caused by uneven clamping. A torque wrench is recommended for operation.
Q3: What differential pressure can this filter cartridge withstand?
A: The standard version withstands differential pressure up to 0.5MPa, while the heavy-duty version supports up to 1.0MPa. Operation within the equipment’s recommended differential pressure range is advised.
Q4: What precautions should be taken when applying flame-retardant antistatic filter cartridges to EBM equipment?
A: EBM equipment operates at high temperatures (150–200°C). Cartridges with high-temperature flame retardants, heat-resistant PTFE membranes, stainless steel frames, and fluoroelastomer or metal seals shall be selected. Clearly state high-temperature requirements when placing orders.
