Flow Measurement
Flow Measurement
PFS ISA 1932 Flow Nozzle
0.80% to 1.20% Uncalibrated Uncertainty
Liquids and Gases, Lower uncertainty
Line size: 2 to 20 inches
Head Loss % of Differential: 30 to 85, Beta Dependent
Recommended Minimum Pipe Reynolds Number: Must be greater than 20,000 for basic accuracy
PFS Venturi Nozzle
1.21% to 1.74% Uncalibrated Uncertainty
Liquids and Gases, Lower Loss
Line size: 2.5 to 20 inches
Head loss (permanent pressure loss) in % of Differential: 5% to 20%
Recommended Pipe Reynolds Number: Greater than 150,000 for basic accuracy
PFS Fabricated Venturi Low Flow Meter (FV-LF)
0.50% Uncalibrated Uncertainty
Low Reynolds, Lower Loss
Line size: 3/8 to 12 inches
Head loss % of Differential: 20.0 to 40.0 percent
Recommended pipe Reynolds number: Greater than 6,000 for basic accuracy
The Fabricated Venturi Low Flow Meter is a specially designed meter combining performance elements of both orifice and venturi type devices and provides an accurate solution for wide range flow applications.
PFS Fabricated Elbow Meter (FE)
2.00% Uncalibrated Uncertainty
Low Cost, Small Space Required
Line size: No limitations on line size
Recommended pipe Reynolds number: Greater than 50,000 for basic accuracy
In circumstances where traditional high accuracy flow meter solutions are impractical or impossible, the Elbow Meter as detailed in publications such as ASME Fluid Meters and R.W. Miller Flow Measurement Engineering Handbook, may be a favorable option.
PFS Halmi Nozzle (HN)
2.00% Uncalibrated Uncertainty
Low Cost, Open Channel Application
Line size: 6 to 48 inches
Head loss: Low
Service life: 25 years plus depending on materials
The Halmi Nozzle is an open channel device and was developed for free discharge into tanks or lagoons and pipe to pipe applications in a manhole, for instance. The Halmi Nozzle solution is ideal for open channel custody transfer or billing applications and utilizes a wide range of secondary instrumentation to provide an ideal solution to an open channel requirement.
