Murphy 45 User Manual
45-96003B page 1 of 2
■
Combination Pressure Swichgage instrument and Built-in Electromagnetic Switch
■
High and Low Contacts Can Disable
Engine’s Ignition Due to Critical Pressure
■
Magnetic Switch Will Not Allow Engine
Restart Due to Flywheel Inertia
■
Semi-Automatic Low Pressure Override
Push Button for Engine Startup
Description
The 45 Series pressure Swichgage instrument
incorporates a built-in electromagnetic switch
to disable an ignition whenever the gage contacts operate.
Flywheel inertia cannot restart the engine since
the electromagnetic switch will not allow the
ignition to operate until manually reset.
A semi-automatic lockout push button overrides the low pressure contact for equipment
startup. The lockout automatically disengages
when pressure is established allowing the low
limit contact to be armed for operation should a
low pressure condition occur.
Models are available for conventional magnetos,
capacitor discharge (CD) ignitions, 12/32 VDC
battery systems, and 120 VAC power sources.
Ranges are available from 30”vac (-101 kPa)
[-1.01 bar] thru 10,000 psi (138 MPa) [1379 bar].
Applications
Recommended instrument for most field gathering pumps, the 45 Series instantly stops your
pump when pressures drop due to line breaks,
leaks or when your tank is pumped out.
Overpressure shutdown can occur due to closure of valves in the line, or other line
restrictions.
Specifications
Dial: White on black, dual scale, psi and kPa
standard, 4-1/2 in. (114 mm) diameter.
Case: Die cast aluminum.
Process Connection:
1/4 NPT thru 1000 psi (6.9 MPa) [69 bar];
1/2 NPT 1500 psi (10 MPa) [103 bar] thru
10,000 psi (138 MPa) [1379 bar].
Overrange: Do not exceed 10% above full range.
Sensing Element: Select from bronze or 316 stain-
less steel bourdon tube.
Gage Accuracy: ±2% for first and last quarters of
scale; the middle half is ±1%.
Pressure Relief Disc: Located in rear of case.
Contact Ratings:
45B = 12/30 VDC coil; 10 A, 32 VD DC contacts
45CD = CD ignition coil; 10 A contacts
45M = Magneto ign. coil; 10 A contacts
45N = 120 VAC coil; 10 A, 120 VAC contacts
Wire Connections:
1/2 NPT conduit and terminal block.
Item Weight:
5 lbs 9 oz (2.5 kg) approximately.
Item Dimensions:
10 x 9 x 6 in. (254 x 229 x 152 mm).
Basic Models
45B
Series Swichgage instrument
For use with 12-32 VDC battery ignition systems;
it includes battery ignition type magnetic switch.
45CD
Series Swichgage instrument
For use with (CD) capacitor discharge ignitions;
it includes CD ignition type magnetic switch.
45M
Series Swichgage instrument
For use with magneto type ignitions; it includes
magneto ignition type magnetic switch.
45N
Series Swichgage instrument
For specific use with 110 VAC Power Sources;
it includes 120 VAC type magnetic switch.
Dimensions
45-96003B
Revised 07-06
Catalog Section 05
45 Series Pressure Swichgage®instrument
To Disable Magneto, CD and Battery Ignition Systems
8-7/16 in.
(214 mm)
3-3/8 in.
(86 mm)
1/2 NPT
conduit
45-96003B page 2 of 2
Base Model
45B
45CD
45M
45N
Options (NOTE: Not all options available for every model.)
BC = Back connected bourdon tube
LC = Less case
P4L = PT147 Pressure transmitter w/ 5ft. capillary
*
(Pulsation dampener no longer provided)
*
For capillary greater than 5 ft., specify in 5 ft., incre-
ments following designator, example: P4LI5
P6 = PT167 pressure transmitter direct mount
Specify model number. NOTE: No designator is required for Standard configurations.
List options in alphabetical order (A to Z). Place a dash (–) between each option. See example below.
45B – S – 60 –
How to Order
Dials
Dials are dual scaled psi and kPa/MPa. Single scale and custom dials
are available.
Warranty
A limited warranty on materials and workmanship is given with this FW
Murphy product. A copy of the warranty may be viewed or printed by
going to www.fwmurphy.com/support/warranty.htm
Contact Rating: 12/32 VDC coil, 10 A 32 VDC battery ignition contacts;
Magneto ignition coil, 10 A magneto ignitions contacts; CD ignition coil, 10 A
CD ignition contacts; 120 VAC coil, 10 A, 120 VAC contacts.
45 Series
Typical Wiring Diagram
Range
Vacuum/psi
30”Hg/Vac - 60”Hg/Press.
30” vac - 0 psi
30” vac - 15 psi
30” vac - 30 ps
30” vac - 100 psi
30” vac - 200 psi
30” vac - 300 psi
15 psi
0 - 30 psi
0 - 60 psi
0 - 100 psi
0 - 160 psi
0 - 200 psi
0 - 300 psi
0 - 400 psi
0 - 600 psi
0 - 1000 psi
0 - 1500 psi
0 - 2000 psi
0 - 3000 psi
0 - 5000 psi
0 - 10,000 psi
Code
30HV60H
30V
30V15
30V30
30V100
30V200
30V300
15
30
60
100
160
200
300
400
600
1000
1500
2000
3000
5000
10000
kPa/MPa
-101 kPa–203 kPa
-101 kPa–0 kPa
-101 kPa–103 kPa
-101 kPa–207 kPa
-101 kPa–689 kPa
-101 kPa–1.38 MPa
-101 kPa–2.03 MPa
0 - 103 kPa
0 - 207 kPa
0 - 414 kPa
0 - 689 kPa
0 - 1.10 MPa
0 - 1.38 MPa
0 - 2.07 MPa
0 - 2.76 MPa
0 - 4.14 MPa
0 - 6.89 MPa
0 - 10.34 MPa
0 - 13.79 MPa
0 - 20.68 MPa
0 - 34.48 MPa
0 - 68.95 MPa
bar
-1.01–2.03
-1.01 - 0
-1.01 - 1.03
-1.01 - 2.07
-1.01 - 6.89
-1.01 - 13.79
-1.01 - 20.68
0 - 1.03
0 - 2.06
0 - 4.13
0 - 6.89
0 - 11.03
0 - 13.78
0 - 20.68
0 - 27.57
0 - 41.36
0 - 68.95
0 - 103.42
0 - 137.89
0 - 206.84
0 - 344.73
0 - 689.47
Bourdon Tube/Socket
A=Bronze/Brass (/std. < =1,000 psi)
S = Stainless Steel/Stainless Steel
Shown with CD Ignition
type magnetic switch
Tamperproof Contact Accessory
Knob
Lock
Limit
Switch
Knobs
Order 05000610
In order to consistently bring you the highest quality, full featured products, we reserve the right to change our specifications and designs at any time.
In order to consistently bring you the highest quality, full featured products, we reserve the right to change our
specifications and designs at any time. MURPHY, the Murphy logo, and Swichgage
®
are registered and/or
common law trademarks of Murphy Industries, Inc. This document, including textual matter and illustrations,
is copyright protected by Murphy Industries, Inc., with all rights reserved. (c) 2006 Murphy Industries, Inc.
www.fwmurphy.com
918.317.4100 Email: sales@fwmurphy.com
MS2100
6 2 3
1
G1 23
To CD Ignition
or Magneto.
4
5
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