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Flanged Micromanometer

Updated: 2026-08-06

Overview

The Bourdon Tube Pressure Gauge with Flange is a specialized instrument designed for measuring low-pressure ranges in industrial systems. Its flange-mounted design ensures secure installation, making it suitable for applications where vibration or movement might affect accuracy. This gauge operates on the Bourdon tube principle, where pressure causes a curved tube to straighten, moving a pointer across a calibrated dial. The flange provides stability, reducing errors caused by mechanical stress.

Structure and Working Principle

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The gauge consists of a Bourdon tube, gear mechanism, pointer, and dial housed in a sturdy casing. The flange is typically welded or screwed to the body, allowing direct mounting to pipelines or equipment. When pressure enters the Bourdon tube, it deforms, causing the attached mechanism to rotate the pointer. The degree of movement corresponds to the pressure applied, displayed on the dial in units like psi, bar, or kPa.

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Key Features

Flange-mounted Bourdon tube gauges offer several advantages. Their rugged construction withstands harsh environments, while the flange ensures stable mounting even under vibration. High-visibility dials with anti-parallax designs enhance readability. Options like liquid-filled cases dampen vibrations, and stainless steel versions resist corrosion in chemical or marine applications.

Application Areas

These gauges are widely used in HVAC systems to monitor air pressure in ducts. They're also essential in gas distribution networks for measuring low-pressure gas flows. Industrial applications include filter monitoring, cleanroom pressure control, and pneumatic systems. Their reliability makes them suitable for pharmaceutical, food processing, and water treatment plants where precise low-pressure measurement is critical.

Maintenance and Precautions

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Regular calibration is essential to maintain accuracy, especially after prolonged use or exposure to pressure spikes. Inspect for leaks at the flange connection periodically. Avoid exposing the gauge to pressures beyond its rated capacity, as this can permanently damage the Bourdon tube. Protect from extreme temperatures that might affect material properties or lubricants in the movement mechanism.

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B2B Procurement Guide

When sourcing these gauges in bulk, verify the manufacturer's certifications like ISO 9001. Request pressure testing reports to ensure compliance with standards such as ASME B40.100. Consider total cost of ownership, including calibration services and expected lifespan. For specialized applications, discuss custom options like specific flange sizes, dial customizations, or exotic materials with suppliers.

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