Denali National Park Weather Forecast for Wednesday, April 19. The Denali National Park, AK forecast for Apr 19 is 47 degrees and Patchy rain possible . There is 69 percentage chance of rain and 12 mph winds from the South-Southeast.
Topics: Introduction Equations Discharge Coefficients Error Messages References. Introduction to Orifice Flow Meter Calculation. Orifice flow meters are used to determine a liquid or gas flow rate by measuring the differential pressure (P1 - P2) across the orifice plate. The two standard pressure tapping arrangements for small bore orifices are shown in the drawings; the location of the pressure taps affects the discharge coefficient somewhat.
Drill bit numbers and sizes have an inverse relationship. The larger the number, the smaller the drill bit. (Orifice hole size will be larger for natural gas supply models than propane because of the lower natural gas operating pressure).The actual BTU output is determined by the pressure of the gas supplied, volume of gas which is regulated by the valve and by the orifice fitting orifice hole size.As an example, assuming a fixed natural gas pressure of 3.5 inches of water column a #48 orifice will give a different BTU output than a #46.he actual BTU output is determined by the pressure of the gas supplied, volume of gas which is regulated by the valve and by the orifice fitting orifice hole size. As an example, assuming a fixed natural gas pressure of 3.5 inches of water column a #48 orifice will give a different BTU output than a #46.