Halton BRD pressure-relief dampers are used in offshore, marine and industrial applications to regulate the pressure in the ductwork system.
BRD pressure relief dampers meet international standards for both rectangular (width B 150-1200 mm and height H 150-1400 mm, 1 mm division) and circular ducts (Ø100 – 1250 mm). Non-standard dimensions are available on request. Standard flange width 27 mm. Flanges and drilling also available according to ISO 15138 standards. Modular construction sizes up to 2400×2800 mm are available. Standard frame material thickness 3 mm. Blades are made of two sheets, each of being 0.8 mm thick (sandwich design)..
PART | MATERIAL | FINISHING |
Frame | Carbon steel | Painted or galvanized |
Frame | Stainless steel EN 1.4301 (AISI304), EN 1.4404 (AISI316L), EN 1.4432 (AISI316L) | – |
Blades | Steel | Galvanized |
Blades | Stainless steel EN 1.4301 (AISI304), EN 1.4404 (AISI316L), EN 1.4432 (AISI316L) | – |
Maintenance-free bearings | Stainless steel EN 1.4404 (AISI316L) / Option: bronze bearings available | – |
Shafts | Stainless steel EN 1.4404 (AISI316L) | – |
Standard frame material thickness 3 mm.
Blades are made of two sheets, each of being 0.8 mm thick.
Pressure-relief damper will allow one-way pressure relief in the ductwork. This feature is based on imbalanced blades. When the pressure in the duct rises above selected value (from 30 Pa to 150 Pa, up to 300 Pa optionally) the damper blades open to allow pressure relief. For higher opening pressure, contact Halton Marine. The minimum opening force can be adjusted with weights. When the pressure in the ductwork drops below minimum opening force required, the blades close and seal the duct.
H/HEIGHT
(mm) |
B / WIDTH (mm) | |||||||||||
150 | 200 | 300 | 400 | 500 | 600 | 700 | 800 | 900 | 1000 | 1100 | 1200 | |
150 | 8 | 9 | 11 | 13 | 15 | 16 | 18 | 20 | 22 | 24 | 25 | 27 |
200 | 10 | 12 | 12 | 14 | 16 | 19 | 20 | 22 | 24 | 26 | 28 | 29 |
300 | 12 | 13 | 15 | 18 | 20 | 21 | 24 | 26 | 29 | 31 | 34 | 35 |
400 | 14 | 15 | 18 | 20 | 23 | 25 | 28 | 30 | 33 | 36 | 37 | 40 |
500 | 17 | 17 | 21 | 24 | 27 | 29 | 32 | 35 | 37 | 40 | 43 | 45 |
600 | 19 | 20 | 24 | 26 | 29 | 32 | 36 | 39 | 42 | 45 | 47 | 51 |
700 | 21 | 23 | 26 | 30 | 33 | 37 | 40 | 43 | 47 | 50 | 53 | 57 |
800 | 22 | 24 | 27 | 33 | 36 | 40 | 43 | 47 | 51 | 54 | 58 | 62 |
900 | 26 | 28 | 32 | 36 | 39 | 44 | 48 | 52 | 56 | 60 | 63 | 67 |
1000 | 28 | 30 | 34 | 39 | 43 | 48 | 51 | 55 | 60 | 64 | 68 | 72 |
1100 | 31 | 33 | 38 | 42 | 47 | 51 | 56 | 60 | 65 | 70 | 72 | 78 |
1200 | 33 | 35 | 40 | 45 | 50 | 54 | 59 | 64 | 69 | 74 | 78 | 84 |
1300 | 36 | 38 | 44 | 48 | 53 | 58 | 64 | 69 | 74 | 79 | 83 | 89 |
1400 | 38 | 40 | 46 | 51 | 56 | 62 | 67 | 73 | 78 | 83 | 88 | 94 |
D2 ØD | WEIGHT |
mm | kg |
100 | 12 |
160 | 12 |
200 | 15 |
250 | 17 |
315 | 21 |
400 | 26 |
500 | 36 |
630 | 45 |
800 | 63 |
1000 | 87 |
1250 | 116 |
The above stated weights include counter weights.
Installation and maintenance instructions are with each pressure-relief damper delivery. Copies of Operation and Maintenance manuals are available from Halton Marine Sales offices and distributors.
(S)=Shape of Connection
(A) Circular (D1)
(B) Circular (D1) outlet
(C) Circular (D2)
(R) Rectangular
(W)=Width
Min=150 mm
Max=1200 mm
(H)=Height
Min=150 mm
Max=1400 mm
(D)=Diameter
Min=100 mm
Max=1250 mm
(SF)=Flange Option
(H0) Connection flange in circular connections
(H1) Connection + loose flange in circular connections
(HA) Flanges (2 sides)
(HB) Counter flanges (2 sides)
(HC) Counter flange (1 side)
(N0) (N0) ISO 15138 flange drilling CO+CIR
(N1) ISO 15138 flange drilling CO+LO+CIR
(NA) Not Assigned (circular connection)
(NR) ISO 15138 flange drilling
(DF)=Deep Frame Model
(N) No
(Y) Yes
(LM)=Left Hand Model
(N) No
(Y) Yes
(CW)=Counter Weights Included
(Y) Yes
(MA)=Material Blades
(AS) Stainless steel 0.8 mm EN1.4404
(CS) Carbon steel 0.75 mm
(LS) Stainless steel 0.8 mm EN1.4432
(SS) Stainless steel 0.8 mm EN1.4301
(FM)=Frame Material
(A3) Stainless steel 3 mm EN1.4404
(C3) Carbon steel 3 mm EN1.4404
(L3) Stainless steel 3 mm EN1.4432
(S3) Stainless steel 3 mm EN1.4301
(FI)=Finishing
(HG) Hot galvanized
(NA) Not Assigned (acid treatment)
(PN) Painting
(BM)=Bearing Material
(BR) Bronze
(AS) Stainless steel EN1.4404
Code example
BRD/R-150-150,SF=HA,DF=N,LM=N,MA=CS,FM=C3,FI=HG,BM=AS,ZT=N