Clark Reliance Level Alarms
and Level Controls
|
- RELIABLE
CONTROL OF ALARMS, FUEL CUT-OUTS, PUMPS
- INSTALL ON BOILERS, TANKS, WATER COLUMNS FOR PRESSURES TO 1800 PSI
|
Clark
Reliance Levalarm Models: Descriptions & Functions (click to view)
Model |
Functions |
Material |
Connections |
Max
Pressure |
Switch
Rating |
EA100D ** |
High
or Low Alarm, or fuel Cut-Out |
Cast
Steel ASTM A216 Gr. WCB |
1" Screwed |
350 psi |
UL & CSA
Approved SPDT 5A-125, 250, or 480VAC, ½A-125V
DC or ¼A-250V DC |
EA100S ** |
1" Screwed
or S.W. |
800 psi
@ 520ºF |
EA100
EPS ** |
1" Screwed |
800 psi
@ 520ºF |
EA100G-150 |
High
or Low Alarm, or fuel Cut-Out |
Cast
Steel ASTM A216 Gr. WCB |
1" FNPT/1" FSW |
200 psi |
UL listed and CSA approved SPDT
UL Code 35
5 A, 125, 250, or 480 Vac
1/2 A, 125 Vdc; 1/4 amp 250 Vdc
Switch Max. Temperature: 400°F |
EA100G-300 |
High
or Low Alarm, or fuel Cut-Out |
Cast
Steel ASTM A216 Gr. WCB |
1" FNPT/1" FSW |
500 psi |
EA100G-600 |
High
or Low Alarm, or fuel Cut-Out |
Cast
Steel ASTM A216 Gr. WCB |
1" FNPT/1" FSW |
1000 psi |
EA101D
** |
High
or Low Alarm, Fuel Cut-Out & Pump Controls |
Cast
Steel ASTM A216 Gr. WCB |
1" Screwed |
350WSP
1000 psi |
Series
R100L (plug in) 5A-120 & 240V AC |
EA101S
** |
1" Screwed
or S.W. |
450WSP
1000 psi 1000WSP 1800 psi |
1" Socket
Weld |
|
EA100DP
** |
Dual
Fuel Cut-Out or Fuel Cut-Out & Low Alarm
or Dual Fuel Cut-Out & Low Water Level
Alarm |
Cast
Steel ASTM A216 Gr. WCB |
1" Screwed |
350WSP 650 psi (tank) |
UL & CSA
Approved SPDT 5A-125, 250, or 480V AC ½A-125V
DC or ¼A-250V DC |
EA100SP
** |
1" Screwed
or S.W. |
800 psi
@ 520ºF |
EA15R
** |
Bronze
ASTM B61 |
¾" Screwed |
450WSP |
Series
R100L (plug in) 5A-120 & 240V AC |
EA17/EA-18***
Retropak PC |
High
or Low Alarm, Fuel Cut-Out & Pump Controls |
Carbon
Steel ASTM A516 |
Flanged
Cap |
250
WSP |
** Applications:
Boilers & Tanks & Water Columns | ***
Applications: Water Columns | We Stock Model EA100D and EA100S ! |
|
|
Levalarm® GOLD Float-Type Switch |
3 Models to suit your application needs: |
- EA100G-150: 200 PSI (13.8 Bar) MAWP
- EA100G-300/EA 100G-300SW: 500 PSI (34.5 Bar) MAWP
- EA100G-600/EA100G-600SW: 1000 PSI (69 Bar) MAWP
|
- 3 Models to suit your application needs
![](/clarkreliance/images/LevelAlarmGold2023.jpg)
- For Pressures up to 1000 psi (69 Bar)
- Zero effect from heat, vibration or loss of electrical power
- Positive interlocking magnet design – proven over 30 years of use
- Drop-in design requires no adjustments to commission
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. |
Agency Approvals |
UL 353 FM 7710 |
Connection Sizes: |
Model EA100-G-150: 1" FNPT
Model EA100G-300/EA100G-300SW: 1" FNPT / 1" FSW
Model EA100G-600/EA100G-600SW: 1" FNPT / 1" FSW |
Pressure Rating:
(MAWP = Maximum Allowable
Working Pressure) |
EA100G-150: 200 PSI (13.8 Bar) MAWP
EA100G-300/EA 100G-300SW: 500 PSI (34.5 Bar) MAWP
EA100G-600/EA100G-600SW: 1000 PSI (69 Bar) MAWP |
Float Switch Rating: |
UL listed and CSA approved SPDT
UL Code 35
5 A, 125, 250, or 480 Vac
1/2 A, 125 Vdc; 1/4 amp 250 Vdc
Switch Max. Temperature: 400°F |
Environment: |
Indoor or outdoor |
|
|
|
The EA100D & EA100S have been replaced by the EA100G |
|
EA100D Single Function On Boilers Or Tanks / Max Pressure: 350 PSI
|
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.
See more information on the EA100DLB
|
|
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
- Model EA100DRPT Fits EA100 and EA100D
Installs on Boiler, Tanks, Water Columns - Pressures to 800 PSI
- Designed to retrofit EA100D Models
- Eliminates the float mechanism
- Installs without disturbing any boiler piping
- Higher reliability with conductivity probes
- Less maintenance
Retrofit Kit Includes:
- New flange cover with Tprobe:
- Probe housing kit with ½”conduit connection
- Replacement flange gasket
- One 30 ft. length of 18 gage Teflon® insulated wire are supplied for the installation up to 15 ft. between probe and relay.
Note: relay control sold separately
|
|
|
|
EA100S:
Single Function On Boilers Or Tanks / Max Pressure: 800 PSI
|
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.
See more information on the EA100SLB
|
|
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
- Model EA100SRPV Fits EA100S and EA100SW
Installs on Boiler, Tanks, Water Columns - Pressures to 800 PSI
- Designed to retrofit EA100S Models
- Eliminates the float mechanism
- Installs without disturbing any boiler piping
- Higher reliability with conductivity probes
- Less maintenance
Retrofit Kit Includes:
- New flange cover with V probe:
- Probe housing kit with ½”conduit connection
- Replacement flange gasket
- One 30 ft. length of 18 gage Teflon® insulated wire are supplied for the installation up to 15 ft. between probe and relay.
Note: relay control sold separately
|
|
Model EA100EPS:
For Explosion Proof Applications
|
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
|
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.
|
|
|
|
|
Series
EA101: Dual Functions On Boilers And Tanks
|
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). |
|
|
|
|
Dual Functions
For Float-Type Water Columns
|
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.
|
|
|
|
|
Clark Reliance Relays Improve Reliability,
Offer Installation Ease and Economy
|
Each
relay module is independently fuse protected.
- Plug-in relays are removed by hand, no tools required
- Relays supply low voltage (12 VAC) to Probes
- Relays enhance sensitivity for extremely low water conductivity applications, to 1 Micro Mho
- Relays improve switch contact reliability for low load applications such as computer interface, recorders
- Relays (like the ECID23) use integral LED indicators to verify status.
- Relays will retrofit existing system installations
Typical Relay, Single Level Service
- Direct Mode Operation (Standard) When water level rises to Terminal 3 Probe, water completes circuit. Circuit signals Relay to change state of load contacts, activating Alarm or other equipment, while illuminating integral LED. Relay is energized until water drops below Probe to break circuit, turning off Alarm and LED.
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.
|
|
|
Convert Your EA100D or EA100S Float Style Level Alarm Into A Probe Style
|
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:
- New flange cover with T or V probe*:
- Probe housing kit with ½”conduit connection
- Replacement flange gasket.
- One 30 ft. length of 18 gage Teflon® insulated wire are supplied for the installation up to 15 ft. between probe and relay.
Note: relay control sold separately.
* T-probe for EA100D & V-probe for EA100S
|
|