Pressure Gauge/Indicator

The pressure gauge/indicator is a component used in machinery and equipment manufacturing to measure and display the pressure of fluids. In online filtration systems, it monitors the pressure difference across the filter, providing an indication of the degree of filter clogging and the operating status of the system. The gauge operates on the principle that an elastic element, such as a Bourdon tube or diaphragm, deforms under applied pressure, and this deformation is translated into a reading on a dial or digital display.

Typical specifications for such gauges include a measuring range of 0–1.6 MPa, an accuracy class of 1.6, and a dial diameter of 100 mm, with common sizes also being 63 mm and 160 mm. The process connection is typically G1/2, with bottom or back connection options. The operating temperature range is -20 to 60 °C, and the ingress protection rating is IP54. The case material is typically stainless steel (e.g., 304), while wetted parts may be made of 316L stainless steel for compatibility with aggressive media. The weight varies between 0.5 and 1.0 kg, depending on dial size and material.

These specifications are reference values that must be verified for the specific model and application. Standards such as EN 837-1 for pressure gauges and IEC 60529 for ingress protection are listed as procurement references, but they do not imply certification or compliance of any particular product. When selecting a pressure gauge, it is important to confirm the required measuring range, accuracy, connection type, and materials with the manufacturer or supplier. Regular inspection of the gauge reading can help detect filter clogging, and a significant pressure drop may indicate the need for filter replacement. The gauge should be operated within its specified temperature and pressure limits to avoid damage. If the gauge shows erratic readings or fails to return to zero, it may require recalibration or replacement.

The pressure gauge/indicator measures fluid pressure using an elastic element such as a Bourdon tube or diaphragm. When pressure is applied, the element deforms, and this mechanical movement is transmitted to a pointer or digital display that indicates the pressure value. The deformation is proportional to the applied pressure, allowing for accurate measurement within the specified range.