Filters, dust/mist

Particulate matter, separator, cyclone, electrostatic precipitator, wet dust scrubber, fabric filter, catalytic filtration, two-stage dust filter, absolute filter, high-efficiency air filter, and mist filter. 

Dust/mist masks, which usually are shaped fdters that cover the nose and mouth to filter out dusts, mists, and particles. 

A canister contains both dust/ mist-filtering and vapor-removing material. Canisters contain more air-pnrifying material than cartridges. They last mnch longer and may protect you better in situations where the concentration of gas or vapor in the air is high. They are also much heavier and more uncomfortable to wear. 

Dust/mist filtering masks and cartridges are approved by NIOSH and MSHA. You must wear one that has their stamp of approval. Nonapproved filters are not as protective and are not acceptable. 

Pesticide handlers must wear dust/mist-filtering masks or cartridges with NIOSFI/MSFIA approval number prefix TC21C. 

Dust/mist filtering respirator Dust/mist respirator, or respirator with dust/mist filtering cartridge, respirator with organic vapor-removing cartridge and pesticide prefilter, respirator with canister approved for pesticides, or air-sup-plying respirator... 

Dust/mist masks, prefilters, canisters, filtering and vapor-removing cartridges, and a few cartridge respirators are disposables. They cannot be cleaned, and they should be replaced often. 

PERSONAL PROTECTION wear impervious protective clothing, including boots, gloves, lab coat, apron or coveralls use chemical safety goggles and/or full face shield where dusting or splashing of solutions is possible appropriate respirators with dust/mist filters are needed in areas where exposure would be above the permissible exposure level (PEL) use a full-facepiece positive pressure, self-contained breath apparatus in instances where the exposure levels are not known P2 filter respirators are recommended for harmful particles maintain eyewash fountains and quick-drench facilities in work area. 

Employees engaged in handling operations involving the carcinogens listed below must be provided with, and required to wear and use, a half-mask filter-type respirator for dusts, mists, and fiimes. A respirator affording higher levels of protection than this respirator may be ... 

Filter classifications are marked on the filter or filter package. These classifications are N-Series Not Oil Resistant (approved for non-oil particulate contaminants such as dust, fumes, or mists not containing oil) R-Series Oil Resistant (approved for all particulate contaminants, including those containing oil such as dusts, mists, or fumes—time restriction of 8 hours when oils are present) and P-Series Oil Proof (approved for all particulate contaminants including those containing oil such as dust, fumes, or mists). (See manufacturer s time use restrictions on packaging.)... 

Permanent respirator schedule assignments are for the watch person who engages in welding and will be provided with their own company-provided dust-mist-fume filter APR. This respirator will be worn during all welding operations. 

If the exposure limit is exceeded, a full facepiece respirator with dust/mist filter may be worn up to 50 times the exposure limit or the maximum use concentration specified by the appropriate regulatory agency or respirator supplier, whichever is lowest. For emergencies or instances where the exposure levels are not known, use a full-facepiece positive-pressure, air-supplied respirator. WARNING Air purifying... 

Filters can protect against tiny particles, dusts, mists, or fumes. Filters have the letters HEPA or have a letter and number like P-100 or N-95. The letters tell if the filter works when there is oil in the air ... 

NIOSH s 42CFR Part 84 regulation introduces a new vocabulary for respiratory protection. Previously, employers chose respirators labeled as dust/mist, dust/mist/fume, paint spray, pesticide, etc. The new approach uses a letter and number system to differentiate products. There are three types of filters. 

Fig. 7.9. Batch fluid bed spray granulator used to produce tablet granulations in the pharmaceutical industry. Air-flow necessary for fluidization is generated by a suction-fan (2) mounted in the top portion of the unit, directly driven by an electric motor. The air being used is heated to the desired temperature by an air heater (5). Prefilters remove all impurities at the air inlet (6). The material to be processed has been loaded into the material container (1). The container bottom consists of a perforated plate above which a fine mesh stainless steel retaining screen is fitted. Exhaust filters (7) mounted above the product container retain fines and dust. The granulating liquid (3) is sprayed as a fine mist through a mechanical or pneumatically actuated nozzle (4) onto the finely dispersed, fluidized material to form the desired agglomerates. (Courtesy Aeromatic AG.)...

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