 Actuate
Electric Warning Signals Or Fuel Cut-Out.- Pressures To 800 PSI At 520° F
- FM - Factory Mutual Approved
- CSA - Canadian Standards Associations (specify when needed)
 When tank or boiler
levels reach predetermined high or low levels, the Levalarm
will actuate bells, horns or lights. EA100D models are also
used for fuel cut-out control. The EA100D can be
purchased with or without the body (Model EA100DLB)
Operation: A stainless steel float swings at the end of a pivot
rod. The rod head carries an Alnico V magnet. The
magnet attracts one leg of a U-shaped armature which is
attached to a microswitch leaf actuator. A buoyed float
holds the switch open or closed, depending on terminals used.
As liquid levels fall, the float drops and directs the magnet
to the opposite position. A closed switch actuates alarms.
An open switch achieves fuel cut-out.
Operation is highly reliable and sensitive because the the magnet counterbalances the float, allowing accurate use of the float's buoyancy. Note that the magnet does not "slide", thereby eliminating any friction that could impede movement and accuracy.
For high temperature applications, a ventilated housing is available. Also when insurance or other regulations require two independent fuel cut-outs, two Levalarms may be wired in series. Larger
Image of EA-100 | See
Full Size Levelarm Cut-a-way |
