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Data Sheet
1259 Process Gauge
FEATURES
n
PLUS!
™
Performance (option) dampens vibration, shock and pulsation effects; provides liquid-fill performance in a dry gauge
n
Accuracy complies with ASME B40.100 Grade
2A (±0.5% of span)
n
Solid front safety case with pressure relief back
n
4½˝ dial size
TYPICAL USES
n
Refineries
n
Chemical, petrochemical plants and offshore oil rigs
n
Water and wastewater pressure control
n
Pulp and paper
n
Mining and metals
n
Equipment skids
n
Specialized OEM equipment
1259
4½˝ dial size
SPECIFICATIONS
Accuracy:
Dial Size:
±0.5% of span (ASME B40.100, Grade 2A)
4½˝
Process Connection: ¼ NPT Male, ½ NPT Male
Ranges: Vacuum to 20,000 psi
Case Style:
Movement:
Solid front with pressure relief back
Adjustable
Pointer: Micrometer adjustable, aluminum
Weather Protection: Dry Case: Case is not sealed and recommended for weather protected environment only
Liquid filled or field fillable and Weatherproof: IP66
Hermetically Sealed: IP66
Mounting: Stem, surface, remote
Dampening Options: Liquid fill, throttle screw and pulsation dampener
PLUS!
™ Performance
WETTED COMPONENTS
Bourdon Tube Process Connection
316L SS
K-Monel ® 500
316L SS
Monel ® 400
NON-WETTED COMPONENTS
Joints
Welded
Welded
Case Ring Window
Pressure Relief
Back
PBT
Polybutylene terephthalate
(Meets UL 94-V-0)
PBT
Polybutylene terephthalate/ polycarbonate
(Meets UL 94-V-0)
Glass,
Safety glass,
Acrylic (OPT.)
PBT
Polybutylene terephthalate
(Meets UL 94-V-0)
KEY BENEFITS
• Available with a wide range of diaphragm seals
• Available with a large variety of instrument
All specifications are subject to change without notice. All sales subject to standard terms and conditions.
Ashcroft ® , DuraVis ™ , Plus!
™ and Trust the Shield ® are trademarks of Ashcroft Inc. The following non-Ashcroft trademarks are the property of their respective owners: Monel ® . For more information, see Ashcroft Brands & Trademarks
©2022 Ashcroft Inc. 1279_gauge_ds_RevK_11-02-22
assemblies
Version
Dry
PLUS! ™
Glycerin Fill
Silicone Fill
MIN/MAX TEMPERATURE LIMITS
Ambient Process
-20 °F to 200 °F
(-29 °C to 93 °C)
-20 °F to 250 °F
(-29 °C to 121 °C)
-40 °F to 150 °F
(-40 °C to 66 °C)
-40 °F to 200 °F
(-40 °C to 93 °C)
20 °F to 150 °F
(7 °C to 66 °C)
-40 °F to 150 °F
(-40 °C to 66 °C)
20 °F to 150 °F
(7 °C to 66 °C)
-40 °F to 200 °F
(-40 °C to 93 °C)
Storage
-40 °F to 250 °F
(-40 °C to 121 °C)
-40 °F to 150 °F
(-40 °C to 66 °C)
0 °F to 150 °F
(-18 °C to 66 °C)
-40 °F to 150 °F
(-40 °C to 66 °C)
Note: Other than discoloration of the dial and hardening of the gasketing that may occur as ambient or process temperatures exceeds 150 °F, non-liquid-filled gauges with standard glass windows, can withstand continuous operating temperatures up to 250 °F (121 °C). Liquid-filled gauges can withstand
200° F (93 °C) but glycerin fill and acrylic window will tend to yellow. Accuracy at temperatures above or below the reference ambient temperature of 68 °F (20 °C) will be affected by approximately 0.4% per
25 °F. Gauges with welded joints will withstand 750 °F (400 °C), 450 °F (232 °C) with silver brazed joints for short times without rupture, although other parts of the gauge will be destroyed and calibration will be lost. For continuous use and for process or ambient temperatures above 250 °F (121 °C), a diaphragm seal or capillary or siphon is recommended.
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Data Sheet
1259 Process Gauge
ORDERING CODE Example:
Dial Size/Model Code
451259 - 4 ½ ˝ Polybutylene terephthalate case, solid front (Meets UL 94-V-0)
System (tube and process connection)
S - 316L Stainless steel tube and process connection
P - K-Monel ® 500 tube, Monel ® 400 process connection
451259
451259
S
S
Case Design
D - Dry
L - Glycerin liquid filled (IP65)
Process Connection Sizes
02 - ¼ NPT Male
04 - ½ NPT Male
Process Connection Location
L - Lower
Options (If choosing an option(s) must include an “X”)
SG - Safety glass
LJ - Hermetically sealed
LL - PLUS!
™ Performance
NZ - PLUS!
™ Performance, silicone free (dry gauges)
GV - Silicone filled case
NH - Stainless steel tag wired to case
6B - Cleaned for gaseous, oxygen service
D3 - DuraVis ™ Retroreflective Dial (4 ½ ˝ and dry case only)
C4 - Traceable calibration certificate
5G - Attach one accessory to gauge. Applicable to PL02 pressure limiting valve, V01, V02, V03 valves,
1098, 1100, 1198, 2198 siphons, 7001, 7004 needle valves, 1115 capillary, 1106 pulsation dampner,
1112, PD02 pressure snubbers, MDV swivel adapter, 2265 electric warning contact
Range (coding examples only, see range table on page 3 for all standard ranges)
Single Scales
15# - 15 psi
1BR - 1 bar
1KG - 1 kg/cm 2
100KP - 100 kPa
Dual Scales
2KG/# - 2 kg inner scale, 30 psi outer scale
D
D
02
02
When selecting a diaphragm seal or isolation ring, refer to the Min/Max Guide for compatibility with this gauge or scan the QR code to the right.
L
L
XC4 15#
X _ _
C4
15#
All specifications are subject to change without notice. All sales subject to standard terms and conditions.
Ashcroft ® , DuraVis ™ , Plus!
™ and Trust the Shield ® are trademarks of Ashcroft Inc. The following non-Ashcroft trademarks are the property of their respective owners: Monel ® . For more information, see Ashcroft Brands & Trademarks
©2022 Ashcroft Inc. 1279_gauge_ds_RevK_11-02-22
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Data Sheet
1259 Process Gauge
–
4000#
5000#
6000#
8000#
–
10000#
15000#
20000#
600#
800#
–
1000#
1500#
2000#
–
3000#
STANDARD PRESSURE RANGES
60#
–
100#
120#
–
160#
200#
–
300#
–
400#
500#
–
V/100#
–
15#
20#
–
30#
– psi
30IMV
–
V/15#
–
V/30#
–
V/60#
4BR
6BR
–
–
10BR
–
–
16BR
–
25BR
–
–
N1/5BR
–
N1/9BR
1BR
–
1.6BR
–
2.5BR
bar
N1BR
N1/0.6BR
–
N1/1.5BR
–
N1/3BR
–
400KP
600KP
–
–
1000KP
–
–
1600KP
–
2500KP
–
– kPa
N100KP
N100/60KP
–
N100/150KP
–
N100/300KP
–
N100/500KP
–
N100/900KP
100KP
–
160KP
–
250KP
250BR
–
–
400BR
–
600BR
–
1000BR
-
40BR
–
60BR
–
100BR
–
160BR
–
4000KP
–
6000KP
–
10000KP
–
16000KP
–
25000KP
–
–
40000KP
–
60000KP
–
100000KP
-
4KG
6KG
–
–
10KG
–
–
16KG
–
25KG
–
–
N1/5KG
–
N1/9KG
1KG
–
1.6KG
–
2.5KG
kg/cm 2
N1KG
N1/0.6KG
–
N1/1.5KG
–
N1/3KG
–
250KG
–
–
400KG
–
600KG
–
1000KG
-
40KG
–
60KG
–
100KG
–
160KG
–
0.4MP
0.6MP
–
–
1MP
–
–
1.6MP
–
2.5MP
–
– mPa
N1MP
0.1/0.06MP
–
N0.1/0.15MP
–
N0.1/0.3MP
–
N0.1/0.5MP
–
N0.1/0.9MP
0.1MP
–
0.16MP
–
0.25MP
25MP
–
–
40MP
–
60MP
–
100MP
-
4MP
–
6MP
–
10MP
–
16MP
–
All specifications are subject to change without notice. All sales subject to standard terms and conditions.
Ashcroft ® , DuraVis ™ , Plus!
™ and Trust the Shield ® are trademarks of Ashcroft Inc. The following non-Ashcroft trademarks are the property of their respective owners: Monel ® . For more information, see Ashcroft Brands & Trademarks
©2022 Ashcroft Inc. 1279_gauge_ds_RevK_11-02-22
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Data Sheet
1259 Process Gauge
DIMENSIONS
For reference only, consult Ashcroft for specific dimensional drawings
Dia.5.81
Dia. 5.37
BOLT CIRCLE
Dia. 5.19
3.36
0.24
3X Dia.
0.62
ACROSS FLATS
½ OR ¼ NPT
3.98
1.53
2.63
All specifications are subject to change without notice. All sales subject to standard terms and conditions.
Ashcroft ® , DuraVis ™ , Plus!
™ and Trust the Shield ® are trademarks of Ashcroft Inc. The following non-Ashcroft trademarks are the property of their respective owners: Monel ® . For more information, see Ashcroft Brands & Trademarks
©2022 Ashcroft Inc. 1279_gauge_ds_RevK_11-02-22
4 of 4 ashcroft.com
| 1.800.328.8258 | Contact Us
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