Clark Reliance Level Alarms and Level Controls |
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Clark
Reliance Levalarm Models: Descriptions & Functions (click to view)
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Levalarm® GOLD Float-Type Switch |
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3 Models to suit your application needs: | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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The new Levalarm GOLD switch represents a major step forward in reliability. It employs the same interlocking magnet operation used by Clark Clark-Reliance in its Jerguson Level Switches for over 28 years. Here’s how it works: A stainless steel float is attached to the end of a rod with a stainless steel encapsulated magnet. The magnet travels vertically in the pressure tube. The primary magnet on the float rod inside the pressure tube drives the secondary magnet, which in turn drives the tertiary magnet. The tertiary magnet is mounted to the switch arm and activates the switch. The use of repelling magnetic fields create a positive interlocking switch that is vibration resistant. A buoyed float will cause the reaction of the magnets to hold the switch open or closed, depending on which switch terminals are used. As liquid falls in the chamber, the float drops and directs the magnets to the opposite position which activates the switch in the opposite direction. |
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The EA100D & EA100S have been replaced by the EA100G | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
EA100D Single Function On Boilers Or Tanks / Max Pressure: 350 PSI |
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Actuate Electric Warning Signals Or Fuel Cut-Out. Pressures To 350 PSI At 520° F 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).
See more information on the EA100D
Clark Reliance 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 micro-switch 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. |
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The EA100D & EA100S have been replaced by the EA100G | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Want To Convert Your EA100D Float Style Level Alarm Into A Probe Style? (Click for EA100DRPT details)
Retropak Cap Assembly for EA100 Levalarms® Single and Dual Function Control for Alarms, Pumps & Fuel Cut-Outs
Installs on Boiler, Tanks, Water Columns - Pressures to 800 PSI
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EA100S: Single Function On Boilers Or Tanks / Max Pressure: 800 PSI |
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Actuate Electric Warning Signals Or Fuel Cut-Out. Pressures To 800 PSI At 520° F When tank or boiler levels reach predetermined high or low levels, the Levalarm will actuate bells, horns or lights. EA100S models are also used for fuel cut-out control. The EA100S can be purchased with or without the body (Model EA100SLB).
See more information on the EA100S Clark Reliance Model EA100SLB 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 micro-switch 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. |
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The EA100D & EA100S have been replaced by the EA100G | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Want To Convert Your EA100S Float Style Level Alarm Into A Probe Style? (Click for EA100SRPV details)
Retropak Cap Assembly for EA100 Levalarms® Single and Dual Function Control for Alarms, Pumps & Fuel Cut-Outs
Installs on Boiler, Tanks, Water Columns - Pressures to 800 PSI
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Model EA100EPS: For Explosion Proof Applications |
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The Levalarm Model EA100EPS is equipped with a switch housing that meets UL requirements for Class 1, Group D, Division 1 service. In design, materials, and performance, this model is similar to Model EA100S. Explosion proof models are ideally suited for chemical and petroleum field applications. | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
EA100DP: Dual Function Float & Probes |
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Operation is highly reliable and sensitive because 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 Levalarm's may be wired in series. Actuate Dual Fuel Cut-Out, Fuel Cut-Out & Low Alarm, Or Dual Fuel Cut-Out & Low Alarm. Pressure To 800 PSI At 520ºF These Levalarm models incorporate two independent controls, operating on different principles, and contained in a common body. They are usually installed when insurance or other regulations require two independent fuel cut-out devices - which may share a common chamber. One cut-out switch is float actuated, a second switch consists of one or two probes which extend into the water chamber, the chamber serving as a ground connection. Probe Operation: When water drops below the probe end, a relay is de-energized and opens the fuel cut-out circuit and/or closes the low alarm circuit. A second probe, shorter, can actuate an alarm when water approaches the fuel cut-out point. Relay control units, in specified NEMA enclosures, can be mounted virtually any distance from the Levalarm. |
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Series EA101: Dual Functions On Boilers And Tanks |
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Recommended Control For Power Plants And Processing Facilities. Pressures To 1800 W.S.P Series EA101 models provide reliable and instant response. Probes respond to the rise and fall of water at predetermined points, to actuate a variety of controls. Each Levalarm monitors up to 3-inch level variation. Multiple units, in series, extend the monitoring range. Use almost anywhere on water applications. Operation One Probe/One Relay: High Alarm -Low Alarm - Fuel Cut-Out (Low Alarm & Fuel Cut-Out At Same Level). Two Probes/One Relay: On And Off Pump Control Within 3-Inch Level Variation. Two Probes/Two Relays: Dual Fuel Cut-Out (Low Alarm & Fuel Cut-Out On Different Levels). |
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Dual Functions For Float-Type Water Columns |
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For fuel cut-out only or fuel cut-out and low alarm. Pressures to 450psi EA15R is a probe type Levalarm featuring a pair of probes in a bronze body. Factory set cut-out levels may range from 2-1/2" to 5-1/2" above the lower water gage valve center. Minimum mounting centers: 12". When ordering, specify valve centers, and relay control unit. Also locate fuel cut-out point distance above centerline of valve connection. |
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Typical Relay, Single Level Service
Inverse Mode Operation (Optional) Upon powering Supply Terminals 1 and 2, Relay energizes (LED on). When water rises to Terminal 3 Probe, Probe signals Relay to de-energize (LED off). Relay remains de-energized until water drops below Probe. Even during momentary power failures, Relay remains in "safe" mode in Low Level applications. Specify inverse mode, when required. |
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Convert Your EA100D or EA100S Float Style Level Alarm Into A Probe Style |
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Retropak Cap Assembly for EA100 Levalarms® The Clark Reliance Retropak PC are available for converting float-type water columns into versatile Probe Control Stations. Retrofit Kit Includes:
* T-probe for EA100D & V-probe for EA100S |
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