grada brochure sect 3 (jan11).qxd:layout 1 asgs130.pdfas135 steel gs120 gs126 gs130 gs135...
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S P E C I F I C A T I O N S S U B J E C T T O C H A N G E
Te l : Sa les 01942 889555 I Web: www.grada.co.uk
section3
SUPPLY AND RETURN AIR GRILLESTYPE: AS/GS120 • AS/GS130
The grille type AS / GS is used for thesupply and exhaust of cooled orheated air in facilities such aswarehouses, workshops, commercialcentres, ...The grille can be mounted directlyon a circular duct.The vanes can be adjusted manu-ally and individually to obtain anoptimal air distribution.
Throw factor is based on a vR of 0,17 m/s in the occupied zone.See p. 1 160 for a detailed selection.Only for supply. For exhaust, see p. 1 160
Fast selection diagram
Application
Technical information
Installation dimensions
AS/GS120 AS/GS130
Characteristics:
• free passage ca. 70% (depen-ding on the position of the vanes)
• AS / GS 120: exhaust grille
• AS / GS 130: supply grille
• nom. L = 225-325-425-525-625-825-1025-1225 mmnom. H = 75-125-225-325 mm
Construction:
• AS : roll-formed aluminium sheet
• GS : roll-formed steel sheetBoth are phosphated andpainted in white (RAL 9010)
Nominal dimensions:L = nominal length (mm)H = nominal height (mm)All dimensions in mm
DimensionL x H (mm)
Throw LT (m)
NR
S P E C I F I C A T I O N S S U B J E C T T O C H A N G E
Te l : Sa les 01942 889555 I Web: www.grada.co.uk
section3
SUPPLY AN RETURN AIR GRILLESFRAME AND CORE OPTIONS
Accessories FixingSpecifications description• GT005 : inclined hit-and-miss damper
out of galvanised sheet steel, paintedblack
• GT006 : hit-and-miss damper out ofgalvanised steel sheet, paintedblack
Visible screw fixingExample:
Steel supply and exhaust grille withindividually adjustable vanes for moun-ting in circular ducts, equipped with aninclined damper.The grille is painted in white (RAL 9010)
Type: GS130 + GT005nom. dim. (LxH) ... x ... mm
How to order
GS130, dimension 625 x 125 mm, with hit-and-miss damper GT005
2:single row of vertical vanes3:vertical front vanes, horizontal back vanes
G: steelA : aluminium
HL
G S 1 3 5 - - 0 6 2 5 0 1 2 5
5:inclined hit-and-miss damper GT0056:hit-and-miss damper GT006
Fixing dimensions
Dimensions Duct Diam. (mm)
A
353535
414141
505050
555555
B
656565
717171
808080
858585
C
99108116
105114122
114123131
120129137
min.
160160160
315315315
630630630
900900900
max.
400400400
900900900
140014001400
240024002400
Nominal dimensions
L x H (mm)
425 x 75525 x 75625 x 75
425 x 125525 x 125625 x 125
425 x 225525 x 225625 x 225
425 x 325525 x 325625 x 325
S P E C I F I C A T I O N S S U B J E C T T O C H A N G E
Te l : Sa les 01942 889555 I Web: www.grada.co.uk
section3
GRILLE FOR CIRCULAR DUCTSTYPE: AS/GS120 • AS/GS130
AS/GS120 AS/GS130
AS/GS126 AS/GS135
Aluminium
AS120AS126AS130AS135
Steel
GS120GS126GS130GS135
Construction
Exhaust grille with single row of vertical vanesAS/GS120 with hit-and-miss damper GT006Supply grille with front row of vertical vanes and back row of horizontal vanesAS/GS130 with inclined hit-and-miss damper GT005
Possible deliveries
S P E C I F I C A T I O N S S U B J E C T T O C H A N G E
Te l : Sa les 01942 889555 I Web: www.grada.co.uk
section3
GRILLE FOR CIRCULAR DUCTSPERFORMANCE DATA TYPE: AS/GS120 • AS/GS130
Selection diagram - supply
Air flow rate measurementsupply-exhaust
Correction factors
Velometer jet 2220 A or 6070
- 0°deflection- With ceiling effect- Without damper
NOTE: noise level correctionwith damper: see pressureloss diagram
425
0,0150,0340,0690,102
525
0,0200,0440,0860,130
625
0,0240,0530,1020,148
L (mm)
H (mm)
75125225325
Throw correction factor LT without ceiling effect
Distance between ceiling and supply grille
0,9 m
Correction
LT x 0,75
Ak - values supply (m2)
S P E C I F I C A T I O N S S U B J E C T T O C H A N G E
Te l : Sa les 01942 889555 I Web: www.grada.co.uk
section3
GRILLE FOR CIRCULAR DUCTSPERFORMANCE DATA TYPE: AS/GS120 • AS/GS130
Pressure loss - supply
200
150
100
80
60
50
40
30
20
15
5
10
Pt (Pa)
1,5 2 2,5 3 3,5 4 5 6 7 8 9 10
vK (m/s)
vD
vk pt
NR
+ 3
5
NR
+ 2
5
NR
+ 1
5
NR
+ 0
25 %
50 %
100 %
G
S135
GS
130
D
Selection diagram - exhaust
NR 50
NR 35
NR 20
NR 25
NR 30
NR 40
NR 45
NR
+ 1
1
NR
+ 1
8
Example - exhaust- Exhaust air flow rate qv = 0,14 m3/s- Grille: GS126 625 x 125 mm- Air velocity vk = 4 m/s- Noise level NR 20- Total pressure loss with damper 100 % open: ∆pt = 6,5 Pa- Correction on noise level: NR 20 + 11 = NR 31
425
0,0120,0230,0440,066
525
0,0140,0290,0550,086
625
0,0170,0340,0660,096
L (mm)
H (mm)
75125225325
Ak - values exhaust (m2)