MSA D2055790 3S Basis Plus Full Face Mask

MSA D2055790 3S Basis Plus Full Face Mask Respirator

The MSA D2055790 3S Basis Plus is an industrial-grade, negative-pressure full face respirator engineered for reliable respiratory and ocular protection in hazardous atmospheric conditions. Fabricated from a skin-friendly, non-dermatitic natural rubber elastomer blend, this assembly utilizes a standardized round thread connection conforming to EN 148-1 (Rd 40 mm x 1/7″) to interface directly with threaded gas, particulate, and combined filter canisters. Certified strictly to EN 136:1998 Class 2 specifications, the 3S Basis Plus is purpose-built for heavy-duty shipboard maintenance, chemical cargo mitigation, industrial solvent application, and tank inspection duties where toxic vapors, mists, or airborne particulates present acute respiratory hazards.

Technical Specifications

Key Features

1. EN 136:1998 Class 2 Certified Envelope: Heavy-duty, chemical-resistant construction tested for medium-to-heavy industrial exposure, decontamination procedures, and particulate loading.
2. Universal Standard Rd40 Connection: Built-in connection port conforming precisely to DIN EN 148-1 (Round Thread 40 mm x 1/7″), allowing seamless integration with all standard canister types.
3. Anti-Fog Internal Airflow Circuit: Directionally swept inhalation routing passes across the interior acrylic lens to inhibit fogging without necessitating chemical anti-fog lens coatings.
4. 5-Point Cranial Harness Assembly: Heavy-duty elastomer head harness equipped with quick-release roller buckles allows rapid donning, tension balancing, and seal verification without hair pulling.
5. Integrated Mechanical Speech Transmission: Built-in acoustic transmission diaphragm allows clear vocalization and VHF/walkie-talkie communication through the facepiece.

Marine & Industrial Applications

• Cargo Tank Cleaning, Stripping & Gas Freeing: Chemical tankers, crude carriers, and bulk product barges handling organic vapors, acid gases, and petroleum distallates.
• Surface Preparation & Marine Coatings Application: Protection against volatile organic compounds (VOCs), polyurethanes, high-build epoxies, and toxic fumes during airless spray painting.
• Engine Room Auxiliary Maintenance: Servicing fuel and lube oil purifiers, solvent degreasing of turbocharger components, chemical dosing of marine steam boilers, and handling acidic descaling agents.
• Ballast Water & Sewage Treatment Handling: Working near sodium hypochlorite dosing plants, chlorine dioxide injection modules, and handling caustic sewage treatment agents.
• Hazardous Cargo Emergency Response (Non-Fire): Safe spill containment, flange tightening, and bunkering line inspections involving chemical or toxic dust hazards.