BRD - Pressure-relief damper

Pressure-relief damper

Halton BRD pressure-relief dampers are used in offshore and marine applications to prevent backflow through ventilation ductwork system.

 

  • Fixed frame in painted, galvanized or stainless steel. Blades of galvanized or stainless steel.
  • Models for horizontal or vertical installation
  • Blades contain silicone seal to lower the leakage through blades
  • Available as ATEX approved
  • Leakage class of closed damper up to class 2. Contact Halton for more details..
  • Blades linked and open in parallel
  • Opening pressure adjusted by changing the position of counterweight(s)
  • Opening pressure range between 30 Pa and 150 Pa (up to 300 Pa optional)
  • Counterweights included
  • Standard construction places weights on the right hand side, weights on the left hand side available as an option
  • Final adjustment of counterweights carried out during commissioning
  • Maximum duct pressure for damper construction 5000 Pa and maximum air velocity 15 m/s. In case of high duct pressure, contact Halton Marine for finding
    the most suitable solution

Halton BRD pressure-relief dampers are used in offshore and marine applications to prevent backflow through ventilation ductwork system. The Halton pressure relief dampers do not need an actuator or motor. The BRD dampers can be installed in rectangular or circular ducts horizontally or vertically. The damper is in closed position when the pressure in the duct is lower than the adjusted opening pressure. Opening pressure can easily be set by adjusting weight of each damper/installation. Weights are included in the delivery. Pressure relief dampers can be supplied with non-standard dimensions on request.

Halton BRD

Pressure-Relief Damper



Halton BRD pressure-relief dampers are used in offshore and marine applications to regulate the pressure in the ductwork system. The Halton pressure relief dampers do not need an actuator or motor. The BRD dampers can be installed in rectangular or circular ducts horizontally or vertically. The damper is in closed position when the pressure in the duct is lower than the adjusted opening pressure. Opening pressure can easily be set by adjusting weight of each damper/installation. Weights are included in the delivery. Pressure relief dampers can be supplied with non-standard dimensions on request.

Features 

  • Fixed frame in painted, galvanized or stainless steel. Blades of galvanized or stainless steel.
  • Models for horizontal or vertical installation
  • Blades contain silicone seal to lower the leakage through blades
  • Available as ATEX approved
  • Leakage class of closed damper up to class 2. Contact Halton Marine for more details. 
  • Blades linked and open in parallel
  • Opening pressure adjusted by changing the position of counterweight(s)
  • Opening pressure range between 30 Pa and 150 Pa (up to 300 Pa optional)
  • Counterweights included
  • Standard construction places weights on the right hand side, weights on the left hand side available as an option
  • Final adjustment of counterweights carried out during commissioning
  • Maximum duct pressure for damper construction 5000 Pa and maximum air velocity 15 m/s. In case of high duct pressure, contact Halton Marine for finding  the most suitable solution.

Dimensions and Material Thickness

BRD pressure relief dampers meet international standards for both rectangular (width B 200-1200 mm  and height H 200-1400 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 2400x2800 mm are available. Standard frame material thickness 3 mm. Blades are made of two sheets, each of being 0.8 mm thick.

BRD, general drawings

 

BRD, top

 

With circular connections

With circular connections

 

BRD circular, with connection flanges

---- operation area

Material and Finishing

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.

Product Models and Accessories

Models for horizontal and vertical installation available. Circular connection pieces are available.
Standard construction places weights on the right hand side. Weights on the left hand side available as an option.

Operation Principles

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. 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.

Weights

Weights of standard Halton BRD dampers (kg)

H/HEIGHT 

(mm)
 B / WIDTH (mm)
200 300 400 500 600 700 800 900 1000 1100 1200
200 12 12 14 16 19 20 22 24 26 28 29
300 13 15 18 20 21 24 26 29 31 34 35
400 15 18 20 23 25 28 30 33 36 37 40
500 17 21 24 27 29 32 35 37 40 43 45
600 20 24 26 29 32 36 39 42 45 47 51
700 23 26 30 33 37 40 43 47 50 53 57
800 24 27 33 36 40 43 47 51 54 58 62
900 28 32 36 39 44 48 52 56 60 63 67
1000 30 34 39 43 48 51 55 60 64 68 72
1100 33 38 42 47 51 56 60 65 70 72 78
1200 35 40 45 50 54 59 64 69 74 78 84
1300 38 44 48 53 58 64 69 74 79 83 89
1400 40 46 51 56 62 67 73 78 83 88 94

 

D2 ØD WEIGHT
mm kg
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

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.

Product Code

BRD product code

BRD_3                  
                   
(S)=Shape of Connection            
C Circular (D2)                
B Circular (D1) outlet              
A Circular (D1) inlet              
R Rectangular                
                   
(W)=Width                
 150-1200                
                   
(H)=Height                
 150-1400                
                   
(D)=Diameter                
 100-1250                
                   
(SF)=Flange Option              
NR ISO 15138 flange drilling            
N1 ISO 15138 flange drilling CO+LO+CIR          
N0 ISO 15138 flange drilling CO+CIR          
HC Counter flange (1 side)            
HB Counter flanges (2 sides)            
HA Flanges (2 sides)              
H1 Connection + loose flange in circular connections      
H0 Connection flange in circular connections        
NR Not Assigned (circular connection))          
                   
(DF)=Deep Frame Model            
N No                  
Y Yes                  
                   
(LM)=Left Handed Model            
N No                  
Y Yes                  
                   
(MA)=Material Blades              
SS Stainless steel (0.8) EN1.4301          
LS Stainless steel (0.8) EN1.4432            
AS Stainless steel (0.8) EN1.4404          
CS Carbon steel (0.75)              
                   
(FM)=Material Frame              
L3 Stainless steel (3.0) EN1.4432            
A3 Stainless steel (3.0) EN1.4404            
S3 Stainless steel (3.0) EN1.4301            
C3 Carbon steel (3.0)              
                   
(FI)=Finishing                
NA Not Assigned (acid treatment)            
PN Painting                
HG Hot galvanized              
                   
(BM)=Bearing Material              
BR Bronze                
AS Stainless steel EN1.4404            
                   
(ZT)=ETO Processing              
N No                  
Y Yes                  
                   
AC=Accessories              
                   
Code example                
BRD/R-150-150,SF=HA,DF=N,LM=N,MA=CS,FM=C3,FI=HG,BM=AS,ZT=N        

Downloads & Media

BRD-2015
Type
Datasheet
Taal
Engels (Verenigd Koninkrijk)
Grote
623,3 kB
BRD-2015-CN
Type
Datasheet
Taal
Chinees (China)
Grote
1,0 MB
BRD-ATEX-certifcate
Type
Certificaat
Taal
Engels (Verenigd Koninkrijk)
Grote
1,8 MB