Aluminum Furnace Maintenance Tips

Flowmeter Check List

• Is the meter zeroed in?
• Is the flowmeter valve in open position?
• Does the serial number on the nameplate agree with that on the float stop body?
• Is the rod straight?
• Is the float stop body tube straight?
• Is the float level?
• Are gaskets installed and in good condition?
• Are weights securely fastened?
• Is the meter clean internally?
• Is float in proper position in bore?
• Is pressure and specific gravity of gas same on nameplate of meter?
• A change in pressure, temperature, and specific gravity of the gas can cause an error in meter reading.
• Temperature does not make quite as much difference in reading as does pressure and specific gravity, although it must not be overlooked.

Making Corrections

The method used for correcting a meter reading is a simple procedure by the square root law. Solve for "F". "F" is the factor by which you multiply the scale reading.  The answer you get will be the actual flow rate.

ACTUAL FLOW = F x INDICATED

If you change all 3 conditions, you use the whole formula.  If only one set of conditions change, it is only necessary to use that portion which applies.

The latest design, materials and equipment specifications should be obtained from the company before any reliance is placed on the enclosed since changes may occur due to product improvement.