Intake/exhaust grille pitch 100 mm GVZ
100
pag. B-7
Description
Intake/exhaust grille pitch 100 mm. Inclined blades
with anti-rain profile. Fixing by visible frontal screws.
It is commonly used for air intake/exhaust in air conditioning/ventilating systems usually in the industrial
field.
Dimensions
B (mm) : 200 - 3000 (with increase of 100)
H (mm) : 200 - 2000 (with increase of 100)
Construction
Galvanised steel sheet frame thickness 15/10, galvanised steel blade thickness 10/10.
Finish
Only GVZ105
Galvanised steel.
10
Other versions
X
23
B8
600
50
GVZ 100 R : with anti-mouse mesh.
GVZ 105 : with adjustment damper.
Y
(B-25)x
(H-25)
GVX 100 : stainless steel execution.
BxH H+75
100
GVA 100 : anodised aluminium execution.
Accessories
CTZ : galvanised steel counterframe thickness
20/10.
600
Y
50
85
B+75
23
215
GVZ/GVX 100
Specifications
Intake/exhaust grille pitch 100 mm. Construction in
galvanised steel sheet. Fixing by visible screws.
80
X
19
600
50
B
X
(mm)
(mm)
200
187,5
300
X
H
Y
(mm)
(mm)
1
200
187,5
1
237,5
1
300
237,5
1
400
287,5
1
400
287,5
1
500
337,5
1
500
337,5
1
600
387,5
1
600
387,5
1
700
137,5
2
700
137,5
2
800
187,5
2
800
187,5
2
900
237,5
2
900
237,5
2
1000
287,5
2
1000
287,5
2
1100
337,5
2
1100
337,5
2
1200
387,5
2
1200
387,5
2
1300
137,5
2
1300
137,5
2
1400
187,5
3
1400
187,5
3
1500
237,5
3
1500
237,5
3
1600
287,5
3
1600
287,5
3
1700
337,5
3
1700
337,5
3
1800
387,5
3
1800
387,5
3
1900
137,5
4
1900
137,5
4
2000
187,5
4
2000
187,5
4
N*
N*
* n° of holes per side
F.C.R. SpA - Via E. Fermi, 3 - 20092 Cinisello Balsamo (MI) - Italy
phone +39 02 61798 1 - fax +39 02 61798 300 - www.fcr.it - [email protected]
6.5
X
Y
(B-25)x
(H-25)
BxH
100
H+75
600
Y
50
10
19
B+75
GVA 100
B
X
(mm)
(mm)
2100
237,5
4
2200
287,5
4
2300
337,5
4
2400
387,5
4
2500
137,5
5
2600
187,5
5
2700
237,5
5
2800
287,5
5
2900
337,5
5
3000
387,5
5
N*
03.11.15
Intake/exhaust grille pitch100 mm GVZ
pag. B-8
Selection
1 At the requested air flow qv , with allowed sound
power level LWA, you can determine from diagram
1 (by excess) the effective area Ak which the grille
must have.
3.8
1.8
2.4
3.0
1.3
0.9
0.4
A =0
k
.25 m 2
0.6
Performances
60
LwA (dBA)
55
2 At the requested air flow qv, with the value Ak resulting at point 1, from diagram 2 you can check
that the pressure drop DP is compatible with the
plan’s value.
50
3 With the value Ak resulting at point 1, from diagram 3 you can determine the product BxH, therefore the nominal dimensions B and H of the grille (setting for instance B and getting H).
45
Example
1
40
2000
3000
5000
7000
20000
10000
30000
50000
70000
140
120
2.4
1.8
1.3
0.6
160
0.4
A=
k 0.
25
m2
200
180
0.9
qv (m3/h)
From the first diagram you get Ak < 0,9 m2 you choose Ak = 0,9 m2
3.0
90
80
40
From the third diagram you find out that a grille with
Ak = 0,9 m2, has BxH equal to about 1,4 m2 : you
can use for example a grille 1400 x 1000 mm or a
2000x700 mm.
30
Air flow calculation
70
60
P (Pa)
You must intake 10000 m3/h air from a room where
a sound power level LWA of 50 dBA is allowed. You
want to select a grille of the correct dimensions.
From the second diagram you have : DP = 40 Pa
100
3.8
50
20
2
10
2000
3000
5000
7000
20000
10000
30000
50000
70000
qv (m /h)
3
6
It is necessary to position the velocity probe to measure vk as showed in the picture. You must use hot
wire anemometers taking care to orient the reading
“window” against the flow. In each point you must measure the average velocity in an interval of time of at
least 1 minute (average in time). In order to get the air
flow you must calculate therefore the arithmetic mean
(ṽk) of the values measured in this way and multiply it
by the value of Ak resulting from the third diagram.
5
qv = ṽk x Ak
4
3
2
BxH (m2)
100

1
0.8
0.5
3
0.3
0.2
0.3
0.5
0.8
Ak (m )
2
1
2
3
F.C.R. SpA - Via E. Fermi, 3 - 20092 Cinisello Balsamo (MI) - Italy
phone +39 02 61798 1 - fax +39 02 61798 300 - www.fcr.it - [email protected]
3.8
03.11.15