Murphy Temperature SWICHGAGE SPL - Manual

SPL/45-94117B page 1 of 4
Description
The 4-1/2 in. (114 mm) dial size SWICHGAGE ® is
a mechanical gage for temperature indication. It
includes adjustable, electrical contacts that can be
used for start and stop, to trip alarms and to shut
down equipment.
Ranges are available from 15° to 250°F
(9° to 121°C) thru 260° to 450°F (127° to 232°C).
Basic Operation
This vapor actuated gage features a sealed capillary
tube and sensing bulb. When subjected to heat, the
liquid in the sensing bulb expands to vapor creating
pressure against a bourdon tube mechanism. The
bourdon tube translates this vapor pressure into a
mechanical gage reading.
For models SPLC and SPLFC, the gage pointer
acts as a pressure indicator and as one switch pole
which completes a circuit when it touches the
adjustable limit contacts. Contacts have self-clean-
ing motion to ensure electrical continuity.
A toggle switch is provided on SPLC models to
override the low contact for equipment start-up.
Models 45TE and 45TEF have internal snap-acting
SPDT switches.
Applications
Typical applications include:
• Gas Compressors
• Engine Coolant Temperature
• Process Temperature
• Heaters and Coolers
• Water Pump Temperature
Specifications
Dial: White on black, dual scale, °F and °C stan-
dard, 4-1/2 in. (114 mm) diameter.
Case: Die cast aluminum, surface or panel
mount.
Capillary: PVC armored copper tube, 5 ft. long
(1.5 m.) standard–see options next page.
Sensing Bulb: Copper bulb: 1/2 in. (13 mm) OD;
Length: 7 in. (178 mm). Minimum bulb inser-
tion–see corresponding chart, on page 2.
Pressure Rating: 600 psi (4.1 MPa) [41 bar].
Connection: 1/2 NPT compression fitting.
Overrange: Do not exceed 10% above full range.
Limit Contacts (SPLC and SPLFC): 1-SPDT,
Center off; pilot-duty; 2 A @ 30 V; 1 A @
125 VAC. Contacts are gold plated silver.
Snap-Acting Switches (45TE and 45TEF):
2-SPDT; 2 A @ 250 VAC.
Dry Relay Contact (“BP” Models):
10 A @ 28 VDC or 10 A @ 120 VAC.
Wire Connections:
Surface mount models: 1/2 NPT conduit and
terminal block.
Panel mount models: Wire leads, 18 AWG
(1.0 mm 2 ) x 9 in. (229 mm) long.
“OS” models: 1/2 NPT conduit and wire leads,
18 AWG (1.0 mm
2 ) x 9 in. (229 mm) long.
Item Weight: 8 lb. (3.6 kg) approximately.
Explosion-proof models: 22 lb. (10 kg) approx.
Item Dimensions: 16 x 11 x 5-1/2 in. (406 x 279
x 140 mm).
Explosion-proof models: 12 x 12 x 9 in. (305
x 305 x 229 mm).
Basic Models
SPLC Series SWICHGAGE ®
Surface mount version of the SWICHGAGE ® .
For these models the gage pointer makes with two
adjustable contacts to complete a pilot duty circuit.
SPLFC Series SWICHGAGE ®
Panel-mounting (round case) version of the SPLC.
SPLBP Latching Control Relay
SWICHGAGE ®
This version of the SPLC Series is designed to start
and to stop electric motor driven equipment. The
pilot duty contacts of the SPLBP are connected to a
latching control relay for automatic ON/ OFF con-
trol, either directly or through a motor starter.
45TE Series Snap-Acting SWICHGAGE ®
Surface mount version of the SWICHGAGE ® .
These models offer internal snap-acting SPDT
switches, instead of the single pole contacts.
45TEF Series SWICHGAGE ®
This is the panel mounting (round case) version of
the 45TE series.
45TEBP Snap-Acting and Latching Control
Relay SWICHGAGE ®
Same as 45TE–includes an internal latching con-
trol relay for automatic ON/OFF control either
directly or through a motor starter.
Murphy offers square case configurations altered to fit
round panel openings, see “Dimensions”, next page.
SPL/45-94117B
Revised 08-05
Catalog Section 10
4.5 in. (114 mm) Dial
Temperature SWICHGAGE
®
SPL and 45TE Series
■ Combination Indicating Gage and Critical
Temperature Limit Switches
■ High and Low Temperature Limit Contacts
Are Visible and Adjustable
■
SPDT Snap-Acting Models
■ Panel and Wall Mount Versions
■
Latching Control Relay Versions Available
45TE Model
**
** Products covered by this bulletin comply with
EMC Council directive 89/336/EEC regarding
electromagnetic compatibility except as noted.
*
* Selected configurations are third party listed.
Call Murphy for details.