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Daniel Junior Single-Chamber Orifice Fitting
Field-proven Daniel™ Junior™ Single-Chamber Orifice Fittings deliver reliable, predictable differential pressure flow measurement of gas and liquids in accordance with AGA 3, API 14.
3 and OIML 5167 at high-volume metering stations and other sites requiring measurement on larger line sizes. The fitting's rack-and-pinion configuration saves users time and money by making plate inspections and changes safe, quick and simple. The plate can be safely removed from the fitting without spreading the flanges to eliminate the possibility of costly gas leakage or spillage of liquids, and all parts can be replaced onsite with no need to remove the fitting from the line to expedite maintenance and reduce downtime.
Daniel Junior Single-Chamber Orifice Fitting


Measurement Type
Differential pressure
Fluid Type
Liquid, gas
Discharge Coefficient Uncertainty
In accordance with AGA 3/API 14.3
Line Size
10-in to 24-in (3050-mm to 7300-mm)
Max. Operating Pressure
ANSI 2500
Process Temperature Range
-20°F to +160°F (-29°C to +71°C )
Flange Type
ANSI Raised Face, ANSI RTJ
Process Wetted Material
Carbon Steel (WCB and LCC), 316/316L SST, Duplex
Trim Options
Standard Service, Sweet Service, Sour Service, Low Temperature


  • The Daniel Junior Single-Chamber Fitting is now discontinued.