Pressure Gauge Range Selection Chart

For a mechanical pressure gauge accuracy is defined either as a percentage of the full scale range or a percent of the span.

Pressure gauge range selection chart.

Pressure ranges asme b40 100 recommends that normal operating pressure be confined to 25 75 of the scale. Gauge accuracy pressure gauge accuracy ranges from grade 4a to d according to asme 40 1. The normal operating range should be in the middle half of the range between 25 and 75 of the full scale range. The working pressure in all cases should be limited to 75 of the gauge range.

To select the right pressure gauge for your application the following factors should be considered. For the various requirements in industrial and process instrumentation there are pressure elements from copper alloys stainless steel or special materials. Ashcroft s differential gauges are the right choice for your industrial application. Where alternating pressure and pulsation are encountered working pressure should be limited to 2 3 of the gauge range.

Conclusion to properly select a pressure gauge consider the gauge process range environment accuracy dial. Pressure gauge selection considerations in selecting a pressure gauge 4 range the maximum operating pressure should not exceed 75 of the full scale range. Selecting a pressure gauge in 7 steps. The pressure gauges cover scale ranges from 0 0 5 mbar to 0 6 000 bar and indication accuracies of up to 0 1.

A gauge range of twice the working pressure is generally selected. Duragauge gauges are made in accordance with asme b40 1 enti tled gauges pressure indicating dial type elastic element accuracy grade 2a 0 5 of span the accuracy of a retard range gauge applies. Some examples are shown. For a mechanical pressure gauge accuracy is defined as a percentage of the full scale range while requirements differ from one industry to another the following are general guidelines.

Conditions affecting wear of the system. Pressure gauge range selection should also permit the desired readable scale increments from a required viewing distance. If pulsation is present in the process maximum operating gauge pressure should not exceed 50 of the full scale range. To select the correct pressure range for a gauge where there is dynamic pressure with potential of pulses and surges choose a full scale pressure where the operating pressure occurs in the middle half 50 to 75 percent of.