Explosion Proof Actuator UL Class 1 Div 1
Electrical equipment used in hazardous locations must be designed and certified to withstand internal explosions. This is done using approaches described by UL (North America) or ATEX/CSA (Europe/International). The Class/Division system describes the nature of the hazard involved and the degree of risk. For example, Class I refers to flammable gasses and vapors, and class 1 division 2 covers combustable dusts. The classification also identifies the groups that the hazards fall into.
Generally, Class I, Division 1 motors are built to be used in environments that are routinely exposed to significant quantities of potentially explosive atmospheric gases or vapors. These can exist all the time or for some of the time during regular operation. The motor must be properly labeled and must have a surface temperature that is not hot enough to ignite combustible materials in the environment.
The motor must be constructed to prevent ignition by cooling gases heated during an internal explosion. This is accomplished by passing the gases through long, narrow passageways known as flame paths that cool them below their ignition temperatures and preventing them from spreading through the housing to ignite other materials in the environment. The explosion-proof design must also contain the internal blasts without rupturing completely.
The WE Series and XE Series electric actuators are designed for use in quarter-turn operating applications such as ball valves (1″ and less), butterfly valves, plug valves and dampers. The WE Series is CSA/UL approved and is available in a range of torques from 350 to 80,000 in-lbs. The XE series is ATEX/IECEx certified Ex d IIB T4 Gb, IP67 and is available in a wide range of torques. Explosion Proof Actuator UL Class 1 Div 1