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|
 ELECTRICAL
TEMPERATURE SENSOR ASSEMBLY
The
Exline Electrical Temperature Sensor Assembly is designed
to open or close an electrical circuit when the device
senses a predetermined temperature. Common applications
include compressor discharge gas headers, lube oil, or jacket
water headers on stationary engines, and heater treaters
or similar fired vessels.
The assembly contains a temperature-sensitive eutectic
alloy collar which holds a spring-loaded plunger in
position under a micro switch. The collar melts at a
predetermined temperature, releasing the plunger and
opening or closing the switch.
The micro switch housing is dust tight and explosion
proof malleable iron. The Thermowell and sensor assembly
provide positive service in highly corrosive environments
and the Thermowell is rated to withstand pressures of
up to 8,000 psi. The assembly represents an economical
alternative to other types of sensing devices where
absolute dependability is required, as in remote or
unmanned installations.
The fuse-metal collar is the only required replacement
when the sensor has been activated. Factory collar replacement
is fast and inexpensive.
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| Nipple/
Union Electrical Temperature Sensor Assembly
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| Thermowell
Length (L) |
Header
Collar
Threads |
Thermowell
Part No. |
Striker
Part No. |
Nipple/
Union
Assy. Part No. |
| 1
13/16" |
1/2"
n.p.t. |
300703 |
300310 |
310703 |
| 3
3/16" |
1/2" n.p.t. |
300718 |
300313 |
310718 |
| 4
3/16" |
1/2" n.p.t. |
300711 |
300315 |
310711 |
| 1
13/16" |
3/4" n.p.t. |
300722 |
300310 |
310722 |
| 3
3/16" |
3/4" n.p.t. |
300725 |
300313 |
310725 |
| 4
3/16" |
3/4" n.p.t. |
300712 |
300315 |
310712 |
| Standard
Electrical Temperature Sensor Assembly
|
| Thermowell
Length (L) |
Header
Collar
Threads |
Thermowell
Part No. |
Striker
Part No. |
Standard
Assy. Part No. |
| 1
13/16" |
1/2"
NPT |
300703 |
300306 |
310903 |
| 3
3/16" |
1/2"
NPT |
300718 |
300309 |
310918 |
| 4
3/16" |
1/2"
NPT |
300711 |
300311 |
310911 |
| 1
13/16" |
3/4"
NPT |
300722 |
300306 |
310922 |
| 3
3/16" |
3/4"
NPT |
300725 |
300309 |
310925 |
| 4
3/16" |
3/4"
NPT |
300712 |
300311 |
310912 |
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| How
to Order
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| Determine
desired length of Thermowell, taking into
account the depth of your mounting collar
and the Thermowell threads. Next select
the appropriate assembly part number. Then
select desired collar melting temperature.
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| Available
Eutectic Alloy Collar
|
| Melting
Temps |
117°F |
178°F |
243°F |
349°F |
449°F |
136°F |
198°F |
255°F |
361°F |
478°F |
142°F |
205°F |
281°F |
374°F |
|
150°F |
217°F |
291°F |
390°F |
|
162°F |
228°F |
310°F |
408°F |
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| Typical
Areas Protected by the Electrical Temperature
Sensor Assembly
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| ·
Discharge Gas Headers |
| ·
Jacket Water Headers |
| ·
Lube Oil Headers |
| ·
Heater Treaters and Fired Vessels |
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| Electrical
Component Specifications
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| Micro
Switch Part No. 003078 |
·
*Single Pole - Double Throw #V7-6C17D8-048-1
15.1 amps. & 1/2 hp 125, 250, or 277 V.A.C. 1/2 amp. 125 VDC; 1/4 amp. 250 VDC 5 amp. 120 VAC "L" (Lamp Load) |
Malleable
Iron Junction Unilet Part No. 350296
Explosion-Proof and Dust-Tight
outlet box for hazardous locations. Class
I, Groups C and D; Class II, Groups E, F,
and G; and Class III. |
Option: Copper Free 350296-A
*When ordering only the electrical shutdown
box and micro switch, use part no. 350296
or 350296-A. |
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Details
of Installation
Use 1/2" coupling (unless optional 3/4" n.p.t.
Thermowell was ordered). Weld coupling to header or piping.
Drill hole in header after coupling has been installed,
taking care when drilling to prevent thread damage to
the coupling.
Insert Thermowell through collar and tighten
to add desired torque value. Use appropriate sealant on
Thermowell threads. Connect micro switch to control circuit
using either NC or NO contacts and attach conduit to housing.
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