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DIFFERENTIAL PRESSURE GAUGES
UNI-DIRECTIONAL OR BI-DIRECTIONAL
20 to 500 psi
Uni-directional or Bi-directional
PGD-45 Series
U Heavy-Duty Construction
U Double-Strength,
Shatter-Resistant Glass
U 2-1-2% ANSI Grade A
Accuracy
OMEGA’s PGD Series differential
pressure gauges are rugged
industrial gauges that indicate
the difference between 2 input
connections. Differential ranges
provide the maximum resolution for
applications in which one input is
always at a higher pressure than
the other. In cases in which one
input can be higher or lower than
the other, a bi-directional differential
range should be used.
The PGD Series is constructed with
2 independent Bourdon tubes. The
opposing Bourdon tubes are linked
PGD-45B-30/30, shown
smaller than actual
size. See next page for
dimensions.
to a single pinion gear that rotates a
pointer for direct pressure readings.
By using 2 independent Bourdon
tubes, the gauge can handle liquids
or gases on either or both ports.
The large 4
pressure easy. Each gauge is
equipped with a micrometer
adjustment for rezeroing the gauge.
Gauges are available with ports
located in the lower (six o’clock)
position or in the rear (for panel
mounting).
1
⁄2" dial makes reading
PGD-45L-30, shown
smaller than actual
size. See next page for
dimensions.
PGD Series gauges are
available with ports located
in the back of the gauge
(shown at left), or in the
lower (six o’clock) position
(shown at right).
SPECIFICATIONS
Accuracy: 2-1-2%, ANSI Grade A
2% first 10%, 1% middle 80%,
2% top 10%
Dial Size: 4
Dial Arc: 210°
Window: Double-strength glass
Connection:
Sensor Type: Bourdon tube
Wetted Parts:
Tube: Bronze
Fittings: Brass
Case: Black epoxy-coated aluminum
Operating Temperature: 65°C (150°F)
Weight: 1.4 kg (3 lb)
1
⁄2"
1
⁄4 MNPT
G-63
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DIFFERENTIAL OR BI-DIRECTIONAL RANGES
P-PDGFig. 1
PRESSURE
GAUGES
AB
ON
K
3-“L” HOLES DIA. EQUALLY SPACED
ON “E” DIA. BOLT CIRCLE
K
A
C
15.08 (0.5938)
SQ. FLATS (15)
1/4 NPT
JJ
KK C-1
G
D
Dimensions: mm (inch)
J
NUTS AND BOLTS
NOT SUPPLIED
G
M
H
DIMENSIONS IN in.
DIMENSIONS IN (mm)
KK
F
PGD-45B-30/30, shown smaller
than actual size. See below for
dimensions.
PGD-45L-30, shown
smaller than actual
size. See below for
dimensions.
To Order
MODEL NO. DIAL SIZE CONNECTION
1
PGD-45B-(*)
PGD-45L-(*)
Insert range code from table at right.
*
Ordering Example: PGD-45B-30, 114 mm (4
with back input connection and 0 to 30 psi uni-directional range.
Dimensions: mm (inch)
GAUGE
SIZE
41⁄2"
A B C C1 D E F G H J K L M N O JJ KK
149
7
(5
⁄8)
⁄
2" Back
4
1
⁄
2" Lower
4
82
126
1
(3
⁄32)
(4
1
⁄2") differential pressure gauge
149
26
⁄16)
(5
7
1
⁄8)
(1
⁄16)
15
137
3
(5
⁄8)
(1
RANGE
CODE
20 0/20 5 0.2 30
30
60
100
200
600
1K
15/15
30/30
50/50
100/100
200/200
500/500
Maximum pressure that can be applied to either port on the gauge.
*
PGD-FMR, black flush mount ring for panel mounting.
27
91
1
9
⁄16)
(3
⁄16)
(1
RANGE
(psi)
0/30 5 0.5 60
0/60 10 1 120
0/100 10 1 200
0/200 20 2 300
0/600 100 10 900
0/1000 100 10 1500
15/0/15 5 0.5 60
30/0/30 10 1 120
50/0/50 10 1 200
100/0/100 20 2 300
200/0/200 50 5 600
500/0/500 100 10 1500
40
5
9
3
⁄16)
(
⁄16)
(
15
19
⁄32)
FIGURE
INTERVAL
6
125
7
(
⁄32)
(4
MINOR
GRADUATION
17
15
21
⁄16)
(
⁄32)
STATIC PRES.
LIMIT (psi)*
17
3
21
1
(
⁄32)
(
⁄8)
148
(5
13
⁄16)
G-64
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