A pressure gauge is a device that measures the intensity of fluid, gas, water, or steam in a pressurized machine to ensure that there are no leaks or pressure variations that could compromise the system's performance. Pressure systems are made to work within a specific range of pressure. Therefore, any departure from the accepted norms might significantly impact the system's operation.
Types of Pressure Gauges
Bourdon Tube Pressure Gauge
An elastic tube soldered or welded into a socket makes up a Bourdon tube pressure gauge. Deflection in the box is proportionate to the applied pressure and is conveyed to a rotating gear with a pointer when the pressure changes.
Diaphragm Pressure Gauge
When pressure is applied to a diaphragm pressure gauge, it becomes displaced. This type of pressure gauge operates the same way as a Bourdon pressure gauge, except instead of a flexible tube, it uses a diaphragm to detect pressure.
Capsule Pressure Gauge
Two thin, concentric corrugated diaphragms are firmly sealed together around the circumferences of a capsule pressure gauge. The medium can enter through a hole in the center of one of the diaphragms. As a result, the diaphragms expand or contract when pressure is applied. This change in form causes the rotating movement shown on the gauge's face.
Contractor Pressure Gauge
The contractor pressure gauge was created with heating, ventilation, air conditioning, and plumbing in mind. The wgi contractor pressure gauge is ideal for use in any medium that is not corrosive to copper alloys, for example, air, soil, water, and steam.
How Pressure Gauges Are Made
Case
Plastic, steel, brass, or, most typically, stainless steel are used to make pressure gauge cases, such as this forged brass case pressure gauge. The gauge's price is directly proportional to the complexity and type of casing. Phenolic cases, manufactured from phenols and aldehydes, are utilized in harsh and hazardous situations such as chemical and petrochemical manufacturing.
Socket
The socket is the initial portion of the pressure gauge that makes contact with the pressurized fluid. A hole is drilled at the outlet connection on less expensive meters, whereas a threaded hole for a restrictor orifice is seen on more costly gauges. A restrictor aperture is inserted into the gauge to prevent particles from entering and jamming it.
Pointer
The types of pointers differ depending on the OK modifications that the information allows and the complexity of the lead. For example, adjustments for variations in altitude or wear from pulsations and vibrations are possible with more complicated and refined pointers.
Accessories of pressure gauge –
Snubber
The Adjustable Snubber (Pulsation Dampener) shields pressure instruments from pulsations and rapid pressure changes. Ideal for devices subjected to high-pressure beatings, such as those near the pump discharge.
Syphon
The Syphons shield pressure instruments from the process fluid's high temperature. It aids in lowering the service temperature, exposing the pressure instrument to a lower temperature.
Gauge Saver
When the process pressure exceeds the over range limit of the pressure instrument, the Gauge Saver (Pressure Limit Valve) is used. Gauge Saver shuts off the pressure to the device when the process pressure exceeds the preset pressure, preventing damage to the sensing element and protecting the calibration.
Gauge Adaptors
The Gauge Adaptors connect instruments and accessories with various thread types. You can convert male to female threads by selecting appropriate adaptors and vice versa.
Gauge Union
The Gauge Union or Universal Adaptor (Swivel Adaptor) makes it easier to position the instrument during installation. Stainless steels such as SS304, SS316, Monel, and others are commonly used.
Conclusion
So we can conclude that a pressure gauge is a device that measures the intensity of fluid, gas, water, or steam in a pressure-powered machine to ensure that there are no leaks or pressure variations that could impact the system's performance.