CSC-3000 Series Pneumatic VAV Reset Volume Controllers
8
Applications Guide, Rev G
Magnehelic Gauge to Airflow Rate Chart
VAV Airflow Rate by Duct Size
30 50 100 150 200 300 400 600 1000 1500 2000 3000 4000 6000 8000
4 inch Ro
und
5 inch Round 6 inch Ro
und
8 inch Ro
und
14 inch Oval
12 inch R
ound
10 inch R
ound
16 inch Oval
18 inch Oval
20 inch Oval
.02
.03
.04
.05
.06
.07
.08
.09
.10
.15
.20
.25
.30
.40
.50
.80
.70
.60
1.0
.90
CFM Flow Rate as read by sensor
Differential Pressure
(
∆
P) in Inches w
.c.
NOTE: This chart is for illustration only! Do not
use this chart to obtain your values.
It
is NOT intended for calibration of your
Minimum and Maximum adjustments.
This airflow chart is an
example
of the charts usually
affixed to the VAV box. Each chart is
specific for the
type of flow sensor
located in the inlet side of the VAV
box. Read the differential pressure of the Magnehelic
gauge, follow the line horizontally until it crosses the
diagonal inlet size of box. Read straight down from
this intersection to determine the flow rate.