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All specifications are subject to change without notice. All sales subject to standard terms and conditions.

Ashcroft®, Duragauge®, DuraVis™, Plus!™, Trust the Shield® are trademarks and Gold ServiceSM is a service mark

of Ashcroft Inc. The following non-Ashcroft trademarks are the property of their respective owners: Aminco®,

Halocarbon®, Monel®, Teflon™. For more information, see Ashcroft Brands & Trademarks

©2024 Ashcroft Inc. 1279_gauge_ds_RevP_08-08-24

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Data Sheet

WETTED COMPONENTS

Bourdon Tube

Process Connection

Joints

316L Stainless steel

316L Stainless steel

Welded

316L Stainless steel

Steel

Welded

K-Monel® 500

Monel® 400, Steel

Welded

C510 Pho. Bronze

Brass

Silver Brazed

NON-WETTED COMPONENTS

Case

Ring

Pressure Relief Back

Phenolic

Threaded,

Polycarbonate

(meets UL 94 V-0)

Polycarbonate

(Meets UL 94 V-0)

KEY BENEFITS

• Available with a wide variety of accessory and

diaphragm seal assemblies

• Available with high process temperature

dissipation siphons

1279

41⁄2˝ dial size

MIN/MAX TEMPERATURE LIMITS

Version

Ambient

Process

Storage

Dry

-20 °F to 200 °F

(-29 °C to 93 °C)

-20 °F to 250 °F

(-29 °C to 121 °C)

-40 °F to 250 °F

(-40 °C to 121 °C)

PLUS!™

-40 °F to 150 °F

(-40 °C to 66 °C)

-40 °F to 200 °F

(-40 °C to 93 °C)

-40 °F to 150 °F

(-40 °C to 66 °C)

Glycerin fill

20 °F to 150 °F

(-7 °C to 66 °C)

20 °F to 150 °F

(-7 °C to 66 °C)

0 °F to 150 °F

(-18 °C to 66 °C)

Silicone fill

-40 °F to 150 °F

(-40 °C to 66 °C)

-40 °F to 200 °F

(-40 °C to 93 °C)

-40 °F to 150 °F

(-40 °C to 66 °C)

Halocarbon®

fill

-40 °F to 150 °F

(-40 °C to 66°C)

-40 °F to 200 °F

(-40 °C to 93 °C)

-40 °F to 150 °F

(-40 °C to 66 °C)

TM

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 .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.

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

„

NSF-61 Complaint

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

SPECIFICATIONS

Accuracy:

±0.5% of span (ASME B40.100 Grade 2A)

Size:

41

⁄2˝

Range:

Vacuum, compound to 30,000 psi

Process Connection

Location:

Lower, back, side, top

Process Connection:

1

⁄4 NPT, 1⁄2 NPT, 9⁄16 -18 UNF-2B Aminco®

(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, TeflonTM coated

Movement Materials:

400 SS, TeflonTM coated pinion gear and segment

Dial:

Aluminum, white background, black scale

Pointer:

Micrometer, adjustable, aluminum

Weather Protection:

Case

IP Rating

Ordering

Code

Dry

Case not sealed,

recommended for

weather protected

environment only

S

Dry, field fillable

IP66

SH

Liquid filled

IP66

SL

Dampening Options:

Liquid: glycerin, silicone, Halocarbon®,

PLUS!™ Performance

Mounting:

Stem, surface, flush (STD.), pipe, remote (OPT.)

Approvals:

CE/UKCA, CRN, NSF-61

1279 Duragauge® Pressure Gauge