Page
7
of
28
EM-NRV NORTH AMERICAN SUPPLEMENTAL MANUAL - V2016NRV-ELE
*NFPA 69-2014 (A.12.2.3.4.6) STATES: The minimum design pressure for the ductwork is typically 2 x P
red
because
the pressure wave reflects off the closed valve. Depending on the distance between the flap valve and the enclosure,
pressure piling could further increase the expected peak pressure.
** See Minimum/Maximum Distance Specifications (Page 6 of This Manual)
DIMENSIONS FOR SIZES 7” THRU 28”
Model
ᴓ
A
B
C
D
E
F
G
H
I
LBS
EM-NRV07
7.09” / 180mm
14.1
13.3
21.6
13.3
11.8
7
6.6
-
-
45
EM-NRV08
7.87” / 200mm
14.1
13.3
21.6
13.3
11.8
7
6.6
-
-
45
EM-NRV10
9.84” / 250mm
16.1
15.3
23.6
15.3
12.7
8
7.6
-
-
56
EM-NRV12
11.81” / 300mm
18.1
17.3
26.3
23.6
13.7
9
8.6
-
4.5
84
EM-NRV14
13.78” / 350mm
20
19.2
28.3
25.5
14.7
10
9.6
-
4.5
100
EM-NRV16
15.75” / 400mm
22
23.2
30.3
29.5
15.7
11
10.6
13.7
6.4
120
EM-NRV18
17.72” / 450mm
24
25.1
32.2
33.2
16.7
12
11.6
15.7
8.4
150
EM-NRV20
19.69” / 500mm
25.9
27.1
34.2
38.7
17.7
12.9
12.5
18.1
12.4
177
EM-NRV22
21.65” / 550mm
27.9
29.1
36.2
37.4
18.7
13.9
13.5
19.6
8.4
221
EM-NRV24
23.62” / 600mm
29.9
31.1
38.1
41.1
19.6
14.9
14.5
21.6
10.4
254
EM-NRV26
25.59” / 650mm
31.8
33
40.1
45
20.6
15.9
15.5
23.8
12.4
276
EM-NRV28
27.56” / 700mm
33.8
35
42.1
47
21.6
16.9
16.5
25.5
12.4
298
DUCTWORK OF SUFFICIENT
STRENGTH TO WITHSTAND THE
PEAK EXPLOSION PRESSURE*
DUST COLLECTOR
DISTANCE
**
EM‐NRV
NO RETURN VALVE