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Diamond Flow Sensor K-Factors for VAV Terminal Units
Model Series:
3000
Single Duct
3210
Dual Duct
35S-OAI
Series Fan Powered w/ O.A. Damper
38S
Underfloor Fan Powered
Inlet
Duct Area
Type
Size
(sq. ft.)
4
0.087
5
0.136
6
0.196
7
ROUND
0.267
8
0.349
9
0.442
10
0.545
12
0.754
14
OVAL
0.970
16
1.186
24 x 16
RECT.
2.667
Model Series:
36VRS
Square/Retangular Retrofit
Unit
Damper
Type
(valve)
Size
Size (inches) Area (sq. ft.) (cfm)
7
5 x 5
8
6 x 6
9
8 x 6
10
10 x 8
11
14 x 8
11A
18 x 6
12
SQUARE
12 x 10
13
OR
18 x 10
14
RECT.
18 x 12
15
20 x 14
15A
30 x 12
16
22 x 16
17
24 x 18
18
30 x 20
19
40 x 20
Model Series:
30HQX Single Duct Exhaust (Hospital Grade)
30X
Single Duct Exhaust
Unit
Valve Inlet
Size
Type Size (inches) Area (sq. ft.) (cfm)
4
3.4 x 3.4
5
4.3 x 4.3
6
5.5 x 5.5
7
5.8 x 6.3
8
SQUARE
6.7 x 7.2
9
OR
8.6 x 7.1
10
RECT.
9.5 x 8.0
12
13.6 x 8.1
14
12.9 x 10.8
16
18.3 x 10.8
24 x 16
26.1 x 16.3
Date: 10-2016
Supersedes: 7-2016
Nailor reserves the right to change any information concerning product or specification without notice or obligation.
Installation and Operation Manual
K-Factor
Velocity
F-Factor
(cfm)
(fpm)
(amp.)
182
2092
3.67
325
2390
2.81
455
2321
2.98
657
2461
2.65
899
2576
2.42
1158
2620
2.34
1497
2747
2.13
2058
2729
2.15
2554
2633
2.31
3035
2559
2.45
6797
2549
2.47
Damper
K-Factor Velocity F-Factor
(valve)
(fpm)
(amp.)
0.174
479
2753
2.12
0.250
689
2756
2.11
0.333
919
2760
2.11
0.555
1531
2759
2.11
0.778
2150
2763
2.10
0.750
2068
2757
2.11
0.833
2297
2758
2.11
1.250
3446
2757
2.11
1.500
4135
2757
2.11
1.944
5360
2757
2.11
2.500
6892
2757
2.11
2.444
6739
2757
2.11
3.000
8270
2757
2.11
4.167
11486
2756
2.11
5.555
15315
2757
2.11
Valve Inet K-Factor Velocity F-Factor
(fpm)
(amp.)
0.080
210
2625
2.33
0.128
345
2695
2.21
0.210
580
2762
2.10
0.254
680
2677
2.24
0.335
970
2896
1.91
0.424
1209
2851
1.97
0.528
1539
2915
1.89
0.765
2269
2966
1.82
0.968
2521
2604
2.36
1.373
3586
2612
2.35
2.954
7009
2373
2.85
Page 47 of 48
EZvav Digital Controls
●
Model Series:
3100
Single Duct
3230
Dual Duct
3240
"Blendmaster" Dual Duct
35N
Parallel Fan Powered
35S
Series Fan Powered
35S-CVP Pressurization Series Fan Powered
35SST
"Stealth
" Series Fan Powered
TM
36VRR
Round Retrofit
Inlet
Duct Area
Type
Size
(Sq. ft.)
4
0.087
5
0.136
6
0.196
7
0.267
8
0.349
ROUND
9
0.442
10
0.545
12
0.785
14
1.069
16
1.395
18
OVAL
1.683
Model Series:
37N
Low Profile Parallel Fan Powered
37S
Low Profile Fan Powered
37SST
Low Profile "Stealth
Inlet
Duct Area
Type
Size
(Sq. ft.)
4
0.087
5
0.136
6
ROUND
0.196
8
0.349
10
0.545
14 x 8
RECT.
0.777
14 x 10
RECT.
0.972
Equations:
(
___
∆
∆
Q = K x
P
P =
Where: Q = Airflow Rate (cfm)
∆
P = Sensor Differential Pressure ( " w.g.)
K = K-Factor Calibration Constant (standard air)
F = Amplification Factor (sensor gain)
A = Nom. Duct Area (sq. ft.)
The K-Factors tabulated in the above tables are the air-
flow required to produce a 1.0" w.g. differential pressure
at the Diamond Flow Sensor.
For most up to date Diamond Flow Sensor K-Factors for
VAV Terminal Units "IOM-VAVK" go to
www.nailor.com
K-Factor
Velocity F-Factor
(cfm)
(fpm)
(amp.)
182
2092
3.67
325
2390
2.81
455
2321
2.98
657
2461
2.65
899
2576
2.42
1158
2620
2.34
1497
2747
2.13
2048
2609
2.36
2742
2565
2.44
3683
2640
2.30
4323
2569
2.43
" Fan Powered
TM
K-Factor
Velocity F-Factor
(cfm)
(fpm)
(amp.)
182
2092
3.67
325
2390
2.81
455
2321
2.98
899
2576
2.42
1497
2747
2.13
2035
2619
2.34
2417
2487
2.59
Q
4005 x A
)
(
)
________
2
2
F =
K
K
IOM-EZVAVINST
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