Ashcroft 1279 Specifications
Data Sheet
1279 Duragauge® Pressure Gauge
FEATURES
Custom dial printing options
Micrometer adjustable pointer
PLUS™ Performance option dampens vibration,
shock and pulsation effects
Pressure range from Vacuum to 30,000 psi
TYPICAL USES
Refineries
Chemical and petrochemical plants
Offshore oil rigs
Water and wastewater pressure control
Pulp and water
Mining and metals
Equipment skids
Specialized OEM equipment
Cryogenics
TM
1279
41⁄2˝ dial size
SPECIFICATIONS
Accuracy: ±0.5% of span (ASME B40.100 Grade 2A)
Size: 41⁄2˝
Range: Vacuum, Compound to 30,000 psi
Process Connection
Lower, back, side, top
Location:
Process Connection:1⁄4 NPT Male, 1⁄2 NPT Male,
9
⁄16 -18 UNF-2B (high pressure connection)
Case Style: Solid front with pressure relief back
Window:
Glass (STD.), acrylic, shatter proof glass,
non-glare glass (OPT.)
Movement: Rotary, adjustable, 400 SS, Teflon® coated
Movement Materials:
Dial:
Pointer:
Weather Protection:
400 SS, Teflon® coated pinion gear and segment
Aluminum, white background, black scale
Micrometer, adjustable, aluminum
Dry case: Case not sealed, recommended for
weather protected environment only
Liquid filled or field fillable: IP66 or NEMA 4X (S&P
tube and socket), NEMA 4 (A&R tube and socket
Hermetically sealed: IP66
Dampening Options:
Liquid: glycerin, silicone, Halocarbon®,
PLUS!™ Performance
Mounting:
Stem, surface (STD.), flush, pipe, remote (OPT.)
Approvals: CRN
WETTED COMPONENTS
Bourdon Tube Process Connection Materials Joints
316L SS 316L SS Welded
316L SS Steel Welded
K-Monel® 500 Tube Monel® 400 Welded
C510 Phos. Bronze Brass Silver brazed
KEY BENEFITS
• Available with a wide variety of accessory and
diaphragm seal assemblies
• Available with high process temperature
dissipation siphons
MIN/MAX TEMPERATURE LIMITS
Version Ambient Process Storage
™
-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)
-40°F to 150°F
(-40°C to 66°C)
Dry
PLUS!
Glycerin fill
Silicone fill
Halocarbon®
fill
NON-WETTED COMPONENTS
Case Ring Pressure Relief Back
Phenolic
(Meets UL 94 V-0)
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.
-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)
-40°F to 200°F
(-40°C to 93°C)
Threaded,
Polycarbonate
-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)
-40°F to 150°F
(-40°C to 66°C)
Polycarbonate
(Meets UL 94 V-0)
All specifications are subject to change without notice.
All sales subject to standard terms and conditions.
©2018 Ashcroft Inc. 1279_gauge_ds_RevF_Ltr_06-19
of 51
ashcroft.com
info@ashcroft.com
1.800.328.8258
Data Sheet
1279 Duragauge® Pressure Gauge
ORDERING CODE Example:
Dial Size/Model Code
451279 - 4½˝ solid front 451279
System (tube and process connection)
A - Bronze tube, brass process connection, Max. pressure connection 1,000 psi
P - K-Monel® 500 tube, Monel® 400 process connection, Max. pressure 30,000 psi
R - 316L SS tube, steel process connection, Max. pressure 20,000 psi
S - 316 SS tube, 316L SS process connection, Max. pressure 20,000 psi S
Case Design
S - Solid front case, dry
SH - Solid front case, dry, hermetically sealed SH
SL - Solid front case, liquid filled (glycerin STD.)
Process Connection Sizes
02 - ¼ NPT Male, N/A for ranges over 20,000 psi
04 - ½ NPT Male, N/A for ranges over 20,000 psi
9
09 -
⁄16-18 UNF-2B, high pressure fitting, pressures over 20,000 psi (STD.)
AM - AND 10050-4 (¼ tubing connection)
RW - SAE 7⁄16-20 Straight thread
Process Connection Location
L - Lower
B - Back
D - Side (3 o’clock)
E - Side connection (9 o’clock)
T - Top connection
Options (If choosing an option(s) must include a “X”) (See Table 1 on page 5 for more options)
GV - Silicone case fill
GX - Halocarbon® case fill
LL - PLUS!™ Performance LL
NZ - PLUS!™ Performance, silicone free
NH - Stainless Steel tag wired to case
PD - Acrylic window (STD. with liquid filled or hermetically sealed cases)
C4 - Individual calibration chart (in accordance with ASME B40.100:2013. Accuracy traceable to NIST)
6B - Cleaned for oxygen service
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
100KP - 100 kPa
Dual Scales
15#/BR - 15 psi inner scale, 1 bar outer scale
1BR/# - 1 bar inner scale, 15 psi outer scale
2
451279
S SH 04 L XLL 15#
04
L
X__
15#
All specifications are subject to change without notice.
All sales subject to standard terms and conditions.
©2018 Ashcroft Inc. 1279_gauge_ds_RevF_Ltr_06-19
of 52
ashcroft.com
info@ashcroft.com
1.800.328.8258
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