ATS 4922 Firesafe™ Duct offers a unique, patented, approved combination of flame, smoke, and corrosion resistance characteristics. ATS 4922 Firesafe™ Duct is a dual-laminate system and is available in round, rectangular and oval. The corrosion resistant interior liner consists of a synthetic veil and glass reinforcement, saturated with a vinyl ester resin which provides a highly chemical resistant barrier. Combined with the innovative liner is a fire resistant exterior which is fabricated using a proprietary fire resistant phenolic resin.
ATS 4922 Firesafe™ Duct was specifically designed to exhaust robotic wet benches, gas cabinets, tanks, photo resist, dry etchers and other processes common in semiconductor fabrication facilities. Typically supplied in standard brown or optional white or gray colors (other colors available on request), ATS 4922 Firesafe™ Duct is easily assembled using our ATS H-Collar™ joining system (patent applied for) and our patented ATS Internal Beaded Slip Collar™ system.
The ATS H-Collar™ saves time and money as there are no field external wraps required! The ATS H-Collar™ and ATS Internal Beaded Slip Collar™ maintain the integrity of the ATS 4922 Firesafe™ duct’s corrosion resistance by providing a continuous corrosion barrier on the inside of the duct.
FM#4922 approved for installation without sprinklers: ATS 4922 Firesafe™ Duct is listed for use on non-flammable corrosive vapor exhaust systems (exhausting up to one square foot of flammable liquid exposure per inlet) without the necessity for internal fire sprinklers by Factory Mutual Research, File # J. OR6A1. AC, based on FM #4922 tests.
FM#4922 approved for smoke removal without the necessity for a separate smoke removal duct system: ATS 4922 Firesafe™ Duct is specifically listed by Factory Mutual (after non-collapse, non-close off fire tests) for smoke removal from cleanroom areas when properly designed and sized without the necessity for fire protection sprinkler systems or dampers installed within the duct. ATS 4922 Firesafe™ Duct is specifically listed by Factory Mutual for use in Cleanrooms.
ATS 4922 Firesafe™ Duct complies with paragraph 518.104.22.168 Exception #1
ATS 4922 Firesafe™ Duct complies with paragraph 522.214.171.124 Exception #1.
ATS 4922 Firesafe™ Duct (listing number 8534-1592:100) is listed as Fume Exhaust Ducts or Fume and Smoke Exhaust Ducts, for clean room applications and general purpose use in exhausting air, noncombustible fumes and smoke without the need for interrupters or automatic sprinkler protection.
ATS 4922 Firesafe™ Duct complies with paragraphs 2-1.2.5 Exception #1, 3-3.6 Exception #1, 3-3.7, and 3-5.5 Exception #3.