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PITOT TUBE AIR FLOW METERS
Application:
newterra Pitot Tube Air Flow Meters are designed to be a cost effective, accurate flow meters that are
calibrated for your site-specific conditions.
lines with high humidity and moisture content as well as dry air lines. The PFLOW meter takes two pressure readings
in your process line, one at a high-pressure, zero velocity and one at a low-pressure, full velocity. The pressure
differential is used to calibrate the meter for a desired flow and operating conditions. When ordering the flow meter, it
is critical to supply: operating temperature, pressure or vacuum in psia, and the pipe ID. The PFLOW meter can be
supplied with any scale range required in scfm (25deg C, 14.7psia) or acfm at your listed operating conditions.
Construction:
The high, static pressure is measured using a 304 Stainless Steel probe inserted into the process line. The
probe is designed with 4 measurement ports that provide an average reading for flow through your process pipe.
Multiple ports on the static pressure line ensure that you can maintain an accurate reading while the tube is self-
draining. The low pressure point is measured by tapping a 1/4" hole in the process line ahead of the high-pressure port.
This tapping is completed on the top of the pipe to minimize moisture collection in the pressure communication lines.
The differential pressure gauge is connected to the pressure ports using 3/8" Buna-N and the brass connections are
capable of handling temperatures as high as 250 deg F. The Dwyer Magnehelic ® gauge provides a large, clear and
accurate display of your airflow reading.
Standard Features:
304SS static pressure probe
Brass compression fittings and Buna-N pressure
communication tubing
Direct read display can be calibrated for your
specific operating conditions. Display can read
ACFM or SCFM but SCFM is recommended as
there is less error when the meter is operating
above or below the calibrated pressure. Other
units are available on request.
Large 4" display for accurate reading
Standard
gauges
installation in an existing pipeline. The gauges
can be wall mounted in site-specific locations. A
pipe bracket can be purchased.
PSL-7911 - Meter, Flow, Pitot Tube, 4"
PFLOW SERIES
The unique self draining design allows the meter to function in process
are
shipped
loose
for
Dimensions Chart:
Part Number
1" PFLOW
1-1/2" PFLOW
2" PFLOW
3"PFLOW
4"PFLOW
6"PFLOW
8"PFLOW
Larger pitot tubes can be supplied as required.
A
B
C
D
1/4"
12"
12"
4.75"
3/8"
12"
12"
5.25"
3/8"
12"
12"
5.75"
1/2"
12"
12"
6.75"
1/2"
14"
14"
7.75"
1/2"
14"
14"
9.75"
1/2"
14"
14"
12"
E-1254
Pipe
1"
1.5"
2"
3"
4"
6"
8"
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