Ashcroft 1259 Specifications

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

[e-mail]

1.800.328.8258

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: ±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)

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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

[e-mail]

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#

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