Murphy 45PE User Manual

45PE-96002B

Revised 12-00

Catalog Section 05

(00-02-0771)

4-1/2 in. (114 mm) Dial Pressure SWICHGAGE

®

With Built-In, Snap-Acting SPDT Switches

FWMurphy

45PE Series

■

Combination Indicating Gage and Critical
Pressure SPDT Snap-Acting Switches

■

High and Low Pressure Trip Point Indicators
Are Visible and Field-Adjustable

■

Panel and Surface Mount Versions

*

Products covered by this bulletin comply with EMC Council directive
89/336/EEC regarding electromagnetic compatibility except as noted.

Description

The 4-1/2 in. (114 mm) dial size SWICHGAGE

®

is
a mechanical gage for pressure indication. It
includes 2 adjustable SPDT switches. These snap­acting switches can be used for start and stop, to trip
alarms and to shut down equipment.

Ranges are available from 30” vac (-100 kPa) [-1 bar]
thru 20,000 psi (138 MPa) [1379 bar].

Basic Operation

This highly reliable gage features a bourdon tube
sensing mechanism. Pressure against the bourdon
tube translates into a mechanical gage reading.

The gage pointer acts as a pressure indicator. The
pointer movement is stopped when it meets the trip
point indicator. The bourdon tube continues to travel
slightly and the snap-switch trips.

Applications

Murphy 45PE Series models are widely used in elec­tric motor applications due to their 250 VAC pilot
duty rating. These models can also be used to moni­tor gas compressor pressure, pumping applications
and industrial process applications.

Specifications

Dial: White on black, dual scale, psi and kPa

standard, 4-1/2 in. (114 mm) diameter.

Case: Die cast aluminum, surface or panel mount.
Overrange: Do not exceed 10% above full range.
Process Connection: 1/4 NPT thru 1000 psi; 1/2 NPT

1500 - 20,000 psi. Back connection is optional.

Sensing Element: Select from bronze or 316 stainless

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

(except explosion-proof models).

Snap-Acting Switches:

2-SPDT; 2 A @ 250 VAC.

Dry Relay Contact (“BP” Models):

10 A @ 28 VDC or 10 A @ 120 VAC.

Wire Connections:

Surface mount: 1/2 NPT conduit/ terminal block.
Panel mount: 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: 5 lbs 6 oz (2.4 kg) approximately.

Explosion-proof models: 21 lb. (9.5 kg) approx.

Item Dimensions: 10 x 9 x 6 in. (254 x 229

x 152 mm) approximately.

Explosion-proof models: 12 x 12 x 9 in

(305 x 305 x 229 mm) approximately.

Basic Models

45PE

Series SWICHGAGE

®

Surface mount (square case) version.

45PEF

Series SWICHGAGE

®

Panel mount (round case) version.

45PEBP

Latching Control Relay Series

These SWICHGAGE

®

models feature a latching
control relay for automatic ON/OFF control. The
45PEBP are designed to start and stop electric
motor driven equipment.

NOTE: 45PEBP series models are NOT certified
by CSA or covered by the CE mark.

Dimensions

Surface Mount Models

†

45PEF
Shown

5-7/16 in.
(138 mm)

6-3/4 in.

(171 mm)

2-57/64 in.

(73 mm)

8-7/16 in.
(214 mm)

3-3/8 in.
(86 mm)

1/2 NPT

conduit

††

Panel Mount Models

†

45PEE and 45PEBPE models feature square case
but altered to fit round panel mounting.

††

Optional back connection.

Warranty

A two-year limited warranty on materials and work­manship is given with this Murphy product. Details are
available on request and are packed with each unit.

*

Certified

(Selected Models)

45PE-96002B 2 of 2

CONTROL SYSTEMS & SERVICES DIVISION

P.O. Box 1819; Rosenberg, Texas 77471; USA
[phone] fax [phone]

e-mail [e-mail]

MURPHY DE MEXICO, S.A. DE C.V.

Blvd. Antonio Rocha Cordero 300, Fracción del Aguaje
San Luis Potosí, S.L.P.; México 78384
[phone] fax [phone]
e-mail [e-mail]
www.murphymex.com.mx

FRANK W. MURPHY, LTD.

Church Rd.; Laverstock, Salisbury SP1 1QZ; U.K.
[phone] fax [phone]
e-mail [e-mail]
www.fwmurphy.co.uk

MURPHY SWITCH OF CALIFORNIA

41343 12th Street West
Palmdale, California 93551-1442; USA
[phone] fax [phone]
e-mail [e-mail]
www.murphyswitch.com

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.

MACQUARRIE CORPORATION

1620 Hume Highway
Campbellfield, Vic 3061; Australia
[phone] fax [phone]
e-mail [e-mail]

FWMurphy

P.O. Box 470248
Tulsa, Oklahoma 74147 USA
[phone]

fax [phone]
e-mail [e-mail]

www.fwmurphy.com

R

E

G

I

S

T

E

R

E

D

Printed in U.S.A.

Range

Base Model

45PE
45PEF
45PEBP

45PEE
45PEBPE

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.

45PEBP–4– S– 100 – EX

BP Voltage (This feature is NOT cover by CSA or the CE mark)

Blank= 120 VAC
2 = 12 VDC
3 = 24 VAC
4 = 24 VDC

Bourdon Tube/Socket

A=Bronze/Brass (/std. < =1,000 psi)
R=Stainless Steel/Steel (std. >= 1,500 psi)
S = Stainless Steel/Stainless Steel
P=K Monel/Monel 400

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
0 - 20,000 psi

Code
30HV60H
30V
30V15
30V30
30V100
30V200
30V300
15
30
60
100
160
200
300
400
600
1000
1500
2000
3000
5000
10000
20000

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
0 - 137.90 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
0 - 1378.94

Dials:

Dials are dual scale psi and kPa/MPa. Single scale and

custom dials available.

CSA Certified Models:

45PE Series models with
pressure range thru 5000 psig (34.4 MPa) [344 bar] are CSA certi­fied for Non-Hazardous locations, except options BC, CC, ES, LC
and OS. Explosion-proof “EX” models with pressure range thru
5000 psig (34.4 MPa) [344 bar] are CSA certified for Hazardous
locations. 45PEBP models are not CSA certified.

Contact Rating: 2-SPDT snap-switches (one for high and
low pressure); 2 A @ 250 VAC

NOTE: Diagram shows the pointer in the at rest (shelf) position.

45PE Series

Typical Wiring Diagram

How to Order

Options (NOTE: Not all options available for every model.

)

BC = Back Connected Bourdon Tube (is not CSA certified)
CC = Conduit Connection (is not CSA certified)

ES = Environmentally Sealed, 45PEF only (is not CSA certified)
EX = Explosion-proof (hazardous areas certified up to 5000 psig)
EL = (EXLC) Explosion-Proof Less Case
LC = Less Case (is not CSA certified)
OS = Oil Sealed, 45PEF only (is not CSA certified)

P4 = (PT147) PT147 pressure transmitter w/5 ft. capillary

*

P4L = PT147 Less Pulsation Dampener*

*

For capillary greater than 5 ft., specify in 5 ft. increments

following designator, example: P415

P6 = (PT167) PT167 pressure transmitter direct mount

P6S = (PT167SS) PT167 stainless steel

LOW SWITCH HIGH SWITCH

N.C.–Orange

3

N.O.–Blue

2

Common–Red

1

N.C.–Black

N.O.–Brown

Common–Yellow

6
5
4