Ashcroft 1279 Duragauge Pressure Gauge

Overview

The Ashcroft 1279 Duragauge is a 4½-inch ASME-style process pressure gauge built for plants that need dependable, high-accuracy pressure indication in demanding service. The 1279 pressure gauge uses a solid-front case design with a blow-out back, so any overpressure event vents safely away from the operator rather than through the dial face, a safety feature that has made the Duragauge series a standard specification across refineries and chemical plants. Internally, the gauge relies on a Bourdon tube movement built from 400-series stainless steel with a Teflon-coated pinion, giving the 1279 gauge long service life and a stable, micrometer-adjustable pointer even after repeated pressure cycling.

Seven Star LLC is an authorized supplier of the Ashcroft 1279 Duragauge pressure gauge to industrial buyers throughout Oman and the GCC, giving plant engineers a verified sourcing route for a gauge that is widely specified on process instrumentation datasheets across the region. Because the 1279 gauge is field convertible to a liquid-filled or hermetically sealed configuration, a single base gauge can be adapted to changing site conditions without a full re-order.

Measurement and Operating Principle

Like other Bourdon tube gauges, the Ashcroft 1279 converts applied process pressure into the mechanical deflection of a curved, flattened tube sealed at one end. As pressure rises, the tube tries to straighten, and that motion is transferred through a rotary movement to the pointer across the dial. The 1279 Duragauge achieves ±0.5% of span accuracy, meeting ASME B40.100 Grade 2A, across pressure ranges spanning vacuum and compound service up to 30,000 psi, which lets one gauge platform cover everything from low-pressure utility lines to high-pressure hydraulic and wellhead service.

The rotary, adjustable movement inside the 1279 gauge is built to resist wear from continuous pressure cycling, and the micrometer pointer adjustment allows field technicians to fine-tune indication without opening the movement. Dampening options include liquid fill, a throttle screw, or Ashcroft’s Plus! Performance package, each aimed at reducing pointer flutter on pulsating or vibrating service so operators get a readable, stable indication rather than a blurred needle.

Engineering Design of the Ashcroft 1279

The 1279 Duragauge case is available in a 4½-inch phenolic housing chosen for its chemical resistance, paired with an acrylic, shatterproof glass, or non-glare glass window depending on the site environment. Process connections include ¼-inch NPT male, ½-inch NPT male, and a 9/16-18 UNF-2B high-pressure fitting, with lower or back connection orientation and stem, surface, flush, pipe, or remote mounting options to fit almost any panel or process tap layout. Wetted parts are available in 316L stainless steel, supporting NSF-61 compliant builds for potable water and other purity-sensitive applications.

Weather protection depends on configuration: the standard case is not sealed and is intended for weather-protected locations, while liquid-filled or field-fillable versions reach IP66 or NEMA 4X, and hermetically sealed versions reach IP66 as well, giving specifiers a clear path to outdoor or washdown-rated installations. Ashcroft backs the 1279 gauge with a ten-year pressure system warranty, reflecting the durability built into the Bourdon tube and movement assembly.

Key Features

• 4½-inch ASME B40.100 Grade 2A gauge with ±0.5% of span accuracy
• Solid-front case with blow-out back for operator safety under overpressure
• Pressure ranges from vacuum and compound service up to 30,000 psi
• 400-series stainless steel movement with Teflon-coated pinion for long service life
• Field convertible to hermetically sealed or liquid-filled configuration
• 316L stainless steel wetted parts available for NSF-61 compliant installations
• Multiple process connection sizes and mounting styles for flexible installation
• Ten-year pressure system warranty backing the Bourdon tube and movement

Industrial Applications

The Ashcroft 1279 pressure gauge is specified across refineries, chemical and petrochemical plants, offshore oil and gas platforms, natural gas transmission and LNG facilities, water and wastewater treatment plants, and power generation stations wherever a safe, accurate process pressure reading is required at the panel or process tap. On the industrial side, the same gauge platform is used on turbines, compressors, cryogenic systems, and waterjet or waterblasting equipment where high pressure and mechanical vibration would quickly degrade a lower-grade indicator.

Process plants across Oman and the GCC, including facilities in Muscat, Sohar, and Salalah, rely on the 1279 Duragauge for both new installations and instrumentation replacement programs, and Seven Star LLC supports these projects as an authorized supplier of genuine Ashcroft pressure gauges. That includes helping engineers match wetted material, range, and connection size to the exact process tap before the gauge is ordered, avoiding costly re-specification once equipment reaches site.

Technical Specifications

Get a Quote

Seven Star LLC is an authorized supplier of genuine Ashcroft 1279 Duragauge pressure gauges for buyers across Oman and the GCC. Contact our instrumentation team for range selection, material specification, and a formal quotation for your Ashcroft 1279 gauge requirement.