New York Low Pressure Boiler COF Practice

What are the specifications for a non-mercury gauge of magnitude 5 psig?

1. 2-1/4" gage, dial arc 180*, minimum increments of 1/10 psig

2. 2-1/4" gage, dial arc 270*, minimum increments of 1/5 psig

3. 3-1/4" gage, dial arc 270*, minimum increments of 1/5 psig

4. 2-1/2" gage, dial arc 300*, minimum increments of 1/10 psig

The correct answer is: 2-1/4" gage, dial arc 270*, minimum increments of 1/5 psig

The specification for a non-mercury gauge of magnitude 5 psig is accurately represented by the selected option, which outlines the necessary characteristics for accurate and reliable gauge readings. A pressure gauge that operates effectively at this magnitude should ideally have a diameter of 2-1/4 inches and a dial arc of 270 degrees. This design allows for a clear and wide field of view of the dial, which is crucial for ease of reading, especially in varied lighting conditions or from different angles. The choice of 270 degrees also provides greater resolution and improves the readability of the pressure measured. Furthermore, a minimum increment of 1/5 psig is specified, which strikes a balance between precision and practicality. This increment provides sufficient differentiation in measurement for applications where small changes in pressure can be significant, enhancing operational safety and performance. Overall, these specifications ensure the gauge is user-friendly, reliable, and well-suited for monitoring pressure levels up to 5 psig in a low-pressure boiler environment.