Description:
The BLS 413 K2 Cartridge is a universal-thread gas/vapor filter certified for protection against ammonia (NH₃) and its derivatives. It belongs to the BLS 400 Universal series, featuring a standard 40 mm RD40 threaded connection for seamless integration with compatible half- or full-face respirators. The cartridge is classified as Class 2 (K2), indicating high-capacity filtration suitable for demanding industrial environments.
Highlights:
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Protection Class: K2 (ammonia and derivatives), Class 2 absorption capacity, offering robust filtration performance.
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Universal RD40 Thread Connection: Compatible with a wide range of respirators using the EN 148-1 standard—BLS masks and many others.
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High-quality Activated Carbon: Encased in a non-deformable ABS canister, with grains produced without toxic additives (e.g., hexavalent chromium) and meeting food-grade standards
Performance & Specifications:
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Test Standard: EN 14387:2004 + A1:2008.
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Minimum breakthrough time for 5000 ppm NH₃: > 40 minutes
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Breathing resistance:
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At 30 L/min: < 1.4 mbar (measured 0.6 mbar).
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At 95 L/min: < 5.6 mbar (measured 2.2 mbar)
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Assigned Protection Factor (APF):
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Up to 30× TLV when used with half-mask.
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Up to 400× TLV when used with full-face mask
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Industrial Uses / Applications:
This filter is ideal for environments where ammonia exposure is a risk, such as:
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Chemical processing plants
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Fertilizer manufacturing
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Refrigeration maintenance involving ammonia
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Laboratories handling ammonia-based compounds
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Industrial cleaning with ammonia-containing agents
Its high capacity and performance make it well-suited for demanding applications.

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