Pressure Gauge

Pressure gauges are devices used to measure and display the pressure of gases or liquids within a system. Here are
the key technical specifications for pressure gauges:

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Description

Types:

  • Bourdon Tube Gauges: Most common, suitable for a wide range of pressures.
  • Diaphragm Gauges: Used for measuring low pressures or in corrosive environments.
  • Digital Gauges: Provide electronic readings and may include data logging capabilities.
  • Manometers: Measure pressure using columns of liquid.

Measurement Range:

  • Pressure Range: Typically, from vacuum (0 bar) to several thousand bars (e.g., 0 to 6000 psi).
  • Overpressure Protection: Many gauges include a maximum pressure rating (e.g., 1.5 times the maximum
    pressure).

Accuracy:

  • Accuracy Class: Typically ranges from ±0.25% to ±2% of full scale (FS)
  • Calibration Standards: Commonly calibrated to standards such as ANSI, ASME, or ISO

Dial Size:

  • Diameter: Common sizes include 2.5 inches, 4 inches, and 6 inches (63 mm, 100 mm, 160 mm)
  • Scale: May be linear or logarithmic, depending on the application.

Connection Types:

  • Process Connection: Common types include NPT (National Pipe Thread), BSP (British Standard Pipe), or
    flanged connections.
  • Sizes: Typically range from 1/8 inch to 1 inch.

Materials:

  • Case Material: Typically, stainless steel, brass, or plastic.
  • Bourdon Tube Material: Usually made of brass, stainless steel, or bronze.
  • Diaphragm Material: Often made from stainless steel, Hastelloy, or Monel for corrosive applications.

Temperature Range:

  • Operating Temperature: Typically, from -20°C to +60°C (-4°F to +140°F), but specific gauges can handle
    wider ranges.

Protection Features:

  • Ingress Protection (IP): Ratings may be specified (e.g., IP65) for dust and water resistance.
  • Shock and Vibration Resistance: Some gauges are designed for use in high-vibration environments.

Additional Features:

  • Liquid-Filled Gauges: Filled with glycerin or silicone oil to dampen vibrations and protect against shock.
  • Pointer Style: Standard pointers or adjustable pointers for zeroing.
  • Digital Output: Many digital gauges include features like backlighting, alarms, and output for data logging.

Applications:

  • Industries: Commonly used in HVAC, oil and gas, chemical processing, water treatment, and
    manufacturing.

When selecting a pressure gauge, it’s essential to consider the specific requirements of your application, including
pressure range, accuracy, environment, and medium being measured.

 

 

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