Page 1
Data Sheet
1259 Process Gauge
All specifications are subject to change without notice.
All sales subject to standard terms and conditions.
©2019 Ashcroft Inc. 1259_gauge_ds_Revi_itr_05-23-19
ashcroft.com
info@ashcroft.com
1.800.328.8258
FEATURES
n PLUS!™ Performance (option) dampens vibration, shock
and pulsation effects; provides liquid-fill performance
in a dry gauge
nAccuracy 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: ±0.5% of span (ASME B40.100, Grade 2A)
Dial Size: 4½˝
Process Connection: ¼ NPT Male, ½ NPT Male
Ranges: Vacuum to 20,000 psi
Case Style: Solid front with pressure relief back
Movement: 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
™
Performance
PLUS!
WETTED COMPONENTS
Bourdon Tube Process Connection Joints
316L SS 316L SS Welded
®
K-Monel
500 Monel® 400 Welded
NON-WETTED COMPONENTS
Case Ring Window
PBT
Polybutylene
terephthalate
(Meets UL 94-V-0)
PBT
Polybutylene
terephthalate
(Meets UL 94-V-0)
Glass,
Safety glass,
Acrylic (OPT.)
Pressure Relief
Polybutylene
terephthalate
(Meets UL 94-V-0)
Back
PBT
KEY BENEFITS
• Available with a wide range of diaphragm seals
• Available with a large variety of instrument
assemblies
MIN/MAX TEMPERATURE LIMITS
Version Ambient Process Storage
-20°F to 250°F
(-29°C to 121°C)
-40°F to 200°F
(-40°C to 93°C)
20°F to 150°F
(7°C to 66°C)
-40°F to 200°F
(-40°C to 93°C)
™
-20°F to 200°F
(-29°C to 93°C)
-40°F to 150°F
(-40°C to 66°C)
20°F to 150°F
(7°C to 66°C)
-40°F to 150°F
(-40°C to 66°C)
Dry
PLUS!
Glycerin Fill
Silicone Fill
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.
-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)
of 41
Page 2
Data Sheet
1259 Process Gauge
All specifications are subject to change without notice.
All sales subject to standard terms and conditions.
©2019 Ashcroft Inc. 1259_gauge_ds_Revi_Ltr_05-23-19
ashcroft.com
info@ashcroft.com
1.800.328.8258
ORDERING CODE Example:
Dial Size/Model Code
451259 - 4½˝ Polybutylene terephthalate case, solid front (Meets UL 94-V-0) 451259
System (tube and process connection)
S - 316L Stainless steel tube and process connection S
P - K-Monel
Case Design
D - Dry D
L - Glycerin liquid filled (IP65)
Process Connection Sizes
02 - ¼ NPT Male 02
04 - ½ NPT Male
Process Connection Location
L - Lower L
Options (If choosing an option(s) must include an “X”) X _ _
SG - Safety glass
LJ - Hermetically sealed
LL - PLUS!
NZ - PLUS!
GV - Silicone filled case
NH - Stainless steel tag wired to case
6B - Cleaned for gaseous, oxygen service
D3 - DuraVis
C4 - Individual calibration chart in accordance with ASME B40.100:2013. Accuracy traceable to N.I.S.T C4
Range (coding examples only, see range table on page 3 for all standard ranges)
Single Scales
15# - 15 psi 15#
1BR - 1 bar
1KG - 1 kg/cm
100KP - 100 kPa
Dual Scales
2KG/# - 2 kg inner scale, 30 psi outer scale
®
500 tube, Monel® 400 process connection
™
Performance
™
Performance, silicone free
™
Retroreflective Dial (4½˝ and dry case only)
2
451259
S D 02 L XC4 15#
of 42
Page 3
Data Sheet
1259 Process Gauge
All specifications are subject to change without notice.
All sales subject to standard terms and conditions.
©2019 Ashcroft Inc. 1259_gauge_ds_Revi_itr_05-23-19
ashcroft.com
info@ashcroft.com
1.800.328.8258
STANDARD PRESSURE RANGES
psi bar kPa mPa kg/cm
30IMV N1BR N100KP N1MP N1KG
Vacuum
– N1/0.6BR N100/60KP 0.1/0.06MP N1/0.6KG
V/15# – – – –
– N1/1.5BR N100/150KP N0.1/0.15MP N1/1.5KG
V/30# – – – –
– N1/3BR N100/300KP N0.1/0.3MP N1/3KG
V/60# – – – –
Compound
– N1/5BR N100/500KP N0.1/0.5MP N1/5KG
V/100# – – – –
– N1/9BR N100/900KP N0.1/0.9MP N1/9KG
15# 1BR 100KP 0.1MP 1KG
20# – – – –
– 1.6BR 160KP 0.16MP 1.6KG
30# – – – –
– 2.5BR 250KP 0.25MP 2.5KG
60# 4BR 400KP 0.4MP 4KG
– 6BR 600KP 0.6MP 6KG
100# – – – –
120# – – – –
– 10BR 1000KP 1MP 10KG
160# – – – –
200# – – – –
– 16BR 1600KP 1.6MP 16KG
300# – – – –
–
400# – – – –
500# – – – –
600# 40BR 4000KP 4MP 40KG
800# – – – –
Positive Pressure
– 60BR 6000KP 6MP 60KG
1000# – – – –
1500# 100BR 10000KP 10MP 100KG
2000# – – – –
– 160BR 16000KP 16MP 160KG
3000# – – – –
– 250BR 25000KP 25MP 250KG
4000# – – – –
5000# – – – –
6000# 400BR 40000KP 40MP 400KG
8000# – – – –
– 600BR 60000KP 60MP 600KG
10000# – – – –
15000# 1000BR 100000KP 100MP 1000KG
20000# - - - -
2
25BR 2500KP 2.5MP 25KG
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Page 4
3.36
Data Sheet
1259 Process Gauge
All specifications are subject to change without notice.
All sales subject to standard terms and conditions.
©2019 Ashcroft Inc. 1259_gauge_ds_Revi_Ltr_05-23-19
ashcroft.com
info@ashcroft.com
1.800.328.8258
DIMENSIONS
For reference only, consult Ashcroft for specific dimensional drawings
Dia. 5.37
BOLT CIRCLE
Dia.
5.81
Dia.
5.19
0.24
3X Dia.
0.62
ACROSS FLATS
½ OR ¼ NPT
2.63
3.98
1.53
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