Killark EY-0-T - Killark’s sealing fittings offers a wide variety of seal off options for harsh hazardous locations. From small to large hub sizes to vertical and horizontal mounting, EY series can make for any sealing needs significant. Options are available in copper-free aluminum and Duraloy iron with superior electro-statically applied powder coating for the best corrosive resistance. Application: Class I, Divisions 1 and 2: The purpose of seals in a Class I hazardous location is to minimize the passage of gases and vapors and prevent the passage of flames from one electrical installation to another through the conduit system. Seals are required to