Fire Dampers

Technical Catalogue

Fire Dampers

Fire Dampers are fast acting positive barrier against the spread of fire through the duct work. Specially designed Shutter Type Fire Dampers are efficient, economical and simpler to install than single and multi section blade type fire dampers. In structures which constitutes high or special life hazards such as hospitals, educational institutions, hotels etc where danger to life is imminent, high quality & well engineered fire dampers are most valuable.

Fire Dampers

Ref:FD1000GS

EXCELAIR Air Outlets | Technical Catalogue Fire Dampers | Introduction

1

Fire in buildings is an ever growing hazard that claims more lives and causes greater mate-rial loss every year than it does by natural calamity. This risk is directly proportional to ever growing density of buildings in a given metropolis. This has brought the importance of Fire Dampers into sharp focus today. The function of fire damper is to shut itself automatically upon detection of heat, in order to protect the integrity of a fire barrier and maintain its fire resistance rating where fire seeks to penetrate through HVAC duct work or equipment. Failure of dampers to fully close in the event of fire may lead to catastrophic loss of life and property.

Fire damper provides a swift acting and positive barrier against the spread of fire through ducts. The fire damper blades which are riveted to the top of the frame and securely locked to the bottom through the catch plates, form a shield to inhibit the spread of fire. The blades of the fire damper are held in open position by a heat sensitive device (fusible link) and highly tensioned by stainless steel closure spring. As soon as air temperature inside the ducts reaches the break-point temperature of the fusible link (normally 1650F), the spring tensioned blades shuts to form an impenetrable fire barrier, thus inhibiting the spread of fire.

Specially designed shutter type fire dampers are efficient, economical and are simpler to install than other single or multi section blade type fire dampers. In structures posing high life hazards such as hospitals, institutions and hotels, our fire dampers are most valuable. It is a high quality, multi featured engineering product which proves to be a long life security against the spread of fire through ducts.Smoke dampers installed in ducts and air transfer openings are designed to resist the passage of smoke. These devices are installed to operate automatically, controlled by a smoke detection system capable of being activated from a remote command station.

Smoke dampers can be used in HVAC systems where the fans are shutdown in an event of fire. It can also be used in smoke control system designed to operate during a fire incident. They are also designed to operate against high air velocity and fan pressure with low leakage. They offer 1½ hours effective barrier in an ‘On fire’ situation.

Combined fire-smoke dampers are projected to restrict the spread of fire and smoke in HVAC systems. They are designed to automatically shut down in an event of fire or smoke. It also controls the movement of fire and smoke within a building while the HVAC system is in operation.

Combined fire-smoke damper provides an automatic means of localizing areas of smoke or fire in all ventilation system. These dampers are used at location that are designated as both fire barriers and smoke barriers to prevent the passage of both flame and smoke.

IntroductionFire Dampers

EXCELAIR Air Outlets | Technical Catalogue Fire Dampers | Terminology & Explanation

2

Terminology & ExplanationFire Dampers

Fire DamperFire damper is a device designed to impede the spread of fire through ducts, walls, floors and partitions in a HVAC systems.

,gnisac leets dezinavlag a sedulcni noitcurtsnoc stI .taeh fo noitceted nopu yllacitamotua esolc ot si repmad erfi fo noitcnuf ehTclosure spring, shutter blades,fusible link, catch plates and sleeve.

CasingThe portion of the fire damper that houses the damper blades, fusible links,catch plates, locking ramps, constant force springs and sleeve. It will have a round, oval, square, or rectangular opening where the collar attaches.

Fusible Link Fusible link is temperature sensitive fire protection device considered to be the most important part of a fire protection system. The system is activated when the ambient temperature increases to the point that spurs the fusible link to “break apart”. At the point of breakage it releases the damper components to close, thus restricting the spread of fire. It will stay closed until a new fusible link is installed. The temperature rating of the standard fusible link is 1650 F (740C) &30 Ib load. Fusible links with varying temperature ratings are available. The UL listed fusible link of temperature rating 2120F is available as an option.

SpringPerpetually tensioned various stainless steel springs are used to effectively close the fire damper curtain (shutter) when the fusible link breaks. The fully rated load of the spring is reached after being deflected to a length equal to 1.25 times its diameter. Thereafter, it maintains a relatively constant force regardless of extension length. Load is basically determined by thickness and width of the material and the diameter of the coil. Springs are essential all fire dampers used in horizontal and vertical applications and all dynamic fire dampers. They are installed on both sides of a fire damper.

Catch PlateOn a fire damper, the catch plate catches and locks the leading blade of the fire damper curtain when it shuts. It is installed on all Fire Dampers that have stainless steel springs closures. There are two catch plates per damper, one on each side.

SleeveSleeves are fitted on all fire dampers mounted in fire rated walls, floors or partitions. The sleeve and damper assembly may be fabricated at the factory, in a shop or at the job site. The sleeve will always be smaller than the hole in the fire rated barrier so it can expand and contract without an adverse effect on flawless operation of the damper.

EXCELAIR Air Outlets | Technical Catalogue Fire Dampers | Terminology

3

Static Fire DamperIn static fire damper system, the fire damper closes automatically in the event of fire and controls the spread of fire/smoke to the adjacent sides. A fire damper that is listed and approved for use in duct systems where the HVAC system blower will be cycled off during an alarm (probably turned off by means of an automatic fire detector) also referred to as static fire damper.

Dynamic Fire DamperIn dynamic fire dampers, smoke control system requires HVAC fans to remain in operating (ON state) in order to pressurize areas adjacent to a smoke filled area to stop the migration of smoke. This may be above or below a fire flow, a stairwell or a safe refuse area. The system may also be used to purge smoke to the outside of the building. Dynamic fire dampers are listed and approved for applications, where the HVAC system blower may continue to run during an alarm. Dynamic fire dampers are rated to close against moving air measured in feet per minute (fpm) velocity. Maximum allowable air velocity through the fire dampers is 15 meter per second.

Fire Damper RatingFire dampers are rated by Hours. A fire damper must have a rating that is at least 75 % of the rating of the barrier, a 1.5 hour- rated damper can be installed in a fire barrier rated for 2 hours or less. Fire dampers with a 3 hour rating can be installed in fire barriers rated at 4 hours or less.

CollarThe collar is the portion of the damper that attaches fire damper to the duct. Collars can be in various shapes- round, oval, square or rectangular.

Micro SwitchMicro switches are used to transmit audio or visual signal in to the control room or run down the HVAC blower in the event of fire damper’s shunt down. It is a single pole, double throw switch rated for 15A. It has a set of contacts called NO type(Normally Open type) and set of contacts called NC type(Normally Closed type).

Free AreaFree area is the total minimum area of the opening in a fire damper through which air can pass. The dampers should be designed to offer 100 percentage free area, i.e. Damper size is to be equal to the duct size.

Flow Air flow rate can be expressed as a measure of the multiplication of free area by face velocity. Air flow rate = Free Area x Face Velocity. Standard unit of air flow rate is cfm.

Leakage Damper leakage is a significant factor in controlling the performance of the HVAC system. If leakage is uncontrolled, energy will be wasted and system may fail to perform as designed. Leakage can be expressed as the drop in static pressure (in.w.g).

TerminologyFire Dampers

EXCELAIR Air Outlets | Technical Catalogue Fire Dampers | Blades Inside Airstream [FD-A]

4

Applicable for low to medium air velocity ductwork systems.

Suitable for heating, ventilation, air conditioning systems of fire rating up to 1-½ hours.

Designed to low pressure and low leakage systems.

Fit for installation in walls, partitions and floors made of concrete or brick work.

Easily replaceable and electable temperature sensitive fusible links.

Ensured blade closing by means of stainless steel closure springs on both sides.

Catch plates offer rigid and positive locking of blade in closed position.

Meets all requirements of UL555, NFPA 90A and NFPA 92A.

Sizing

Casing:120mm wide, 20 gauge roll formed galvanized steel casing, constructed to meet DW 144 standards.

Blades: Single skinned, roll formed, interlocking type (shutter), high integrity, 24 gauge galvanized steel blades of coating mass Z275, in accordance with EN 142.

Fusible Link: UL listed standard fusible link of fusing temperature1650 F & 30 Ib load.(2120 dna lanoitpo si knil elbisuf Favailable on demand.)

Catch plates: 18 gauge galvanized steel catch plates and locking ramps on each side, leads to positive blade closure in the event of fire.

Springs: Constant force ‘Negator’ stainless steel and pulling force more than 30Ib, ensurs powerful blade closure when required.

Installation Frame: 18 gauge (1.2mm thickness) galvanized steel or 40mmx40mmx3mm thk. MS angle installation frame (retaining angles) as option.

Sleeve: 150 mm long(Max.), 24 gauge galvanized steel sleeve extension to facilitate the union to the duct work(optional).

Mounting: Can be mounted inline, vertically or horizontally in floor or wall, with or without duct work.

Fire Rating: 1-½ Hours continous fire resistance against fire barrier.

Minimum Size: 150mm(W) x 150mm(H).

Maximum Size: 1000mm(W)x1000mm(H).

Velocity Range: 0 to 3000fpm (0 to 15 m/s.)

Pressure Range: Upto 4 in w.g.

Free Area: 91 to 95% Free Area.

Applications & Features

Standard Construction

Blades Inside Airstream [FD-A]Fire Dampers

EXCELAIR Air Outlets | Technical Catalogue Fire Dampers | Dimensional Details

5

76 mm

mm

76mm(W-5)

H-5

124mm

te

Fusible link

Negator closure spring

Catch pla

124 mm

20 Gauge GI casing


(H-5

X W

-5)

22

2mm

Tabulation - Free Area

Free Area: The total minimum area of the openings in the air outlet or inlet through which air can pass. Free Area is expressed in square feet.

Leakage Chart1.00.90.80.70.60.5

0.4

0.3

0.2

0.10

0.090.080.070.060.050.040.03

0.02

0.01600 700 800 900 1000 2000 3000 4000 5000

Stat

ic P

ress

ure

Dro

p (In

. w.g

)

Air Flow (cfm)

Pressure Drop Chart10

98765

4

3

2

1.0

.9

.8

.7

.6

.5

.4

.3

.2

.120 30 40 50 60 70 80 90 100 200

Stat

ic P

ress

ure

Dro

p (In

. w.g

)

Leakage (cfm/ft2)

WxH 6 8 12 16 20 24 28 32 36 40

6 0.12 0.19 0.27 0.37 0.46 0.55 0.65 0.73 0.84 0.94

8 0.31 0.46 0.70 0.90 1.10 1.30 1.60 1.70 1.85 1.82

12 0.46 0.72 0.89 1.20 1.50 2.00 2.30 2.40 2.80 3.20

16 0.61 0.90 1.20 1.70 2.20 2.60 2.90 3.50 3.40 4.40

20 0.80 1.05 1.40 2.10 2.80 3.40 3.70 4.20 4.70 5.30

24 0.85 1.20 1.80 2.30 3.30 3.80 4.50 5.20 5.60 3.40

28 0.93 1.30 2.20 2.90 3.60 4.50 5.40 5.70 6.70 7.10

32 1.06 1.50 2.40 3.20 4.30 5.50 5.90 6.90 7.80 8.20

36 1.23 1.75 2.70 3.60 4.70 5.70 6.60 7.80 8.90 9.20

40 1.31 1.90 3.10 3.80 5.30 6.80 7.50 8.50 9.40 10.70

Damper Width (Inches)

Dam

per

Hei

ght

(Inch

es)

Dimensional Details Fire Dampers

EXCELAIR Air Outlets | Technical Catalogue Fire Dampers | Blades Outside Air Stream [FD-B]

6

Applicable for medium to high air velocity ductwork systems.


Designed to medium pressure and low leakage systems.



Ensured blade closing by means of stainless steel closure springs on both sides.

Catch plates offer inflexible and positive locking of blade in closed position.




Casing:120mm wide, 20 gauge roll formed galvanized steel casing, constructed to meet DW 144 standards.

Blades: Single skinned, roll formed, interlocking type (shutter), high integrity, 24 gauge galvanized steel blades of coating mass Z275, in accordance with EN 142.

Fusible Link: UL listed standard fusible link of fusing temperature1650F & 30 Ib load.(2120F fusible link is optional and available on demand.


Springs: Constant force ‘Negator’ stainless steel and pulling force more than 30Ib, ensuring powerful blade closure when required.

Installation Frame: 18 gauge (1.2mm thickness) galvanized steel or 40mmx40mmx3mm thk. MS angle installation frame (retaining angles) as option.

Sleeve: 150 mm long(Max.), 24 gauge galvanized steel sleeve extension to facilitate the union to the duct work(optional).


Fire Rating: 1-½ Hours continuous fire resistance against fire barrier.

Sizing

Minimum Size: 100mm(W)x100mm(H)

Maximum Size: 1000mm(W)x1000mm(H)

Velocity Range: 0 to 3000fpm (0 to 15 m/s)


Free Area: 100% Free Area.

Blades Outside Air Stream [FD-B]Fire Dampers


7

76 mm

te

Fusible link


Catch pla

124 mm

HxW

20 Gauge GI casing


HxW

2mm


Free Area: The total minimum area of the openings in the air outlet or inlet through which air can pass. Free Area is expressed in square feet.

Leakage Chart Pressure Drop Chart10

98765

4

3

2

1.0

0.9

0.80.70.6

0.5

0.4

0.3

0.2

0.120 30 40 50 60 7 8 9 100 200

Stat

ic P

ress

ure

Dro

p (In

. w.g

)

Leakage (cfm/ft2)

1.00.90.80.70.6

0.5

0.4

0.3

0.2

0.10

0.090.080.070.060.050.04

0.03

0.02

0.011000 2000 3000 4000 5000

Stat

ic P

ress

ure

Dro

p (In

. w.g

)

Air Flow (cfm)

22 mm

76 mmW

H+63

H+6

3

124 mm

Damper Width (Inches)

Dam

per

heig

ht (I

nche

s)

WxH 6 8 12 16 20 24 28 32 36 406 0.15 0.23 0.31 0.46 0.50 0.70 0.81 1.00 1.15 1.218 0.24 0.35 0.47 0.71 0.78 1.10 1.20 1.70 1.75 1.8212 0.36 0.56 0.76 0.97 1.40 1.80 2.20 2.40 2.60 2.9016 0.46 0.72 1.12 1.42 1.85 2.10 2.50 2.95 3.30 3.7020 0.53 0.85 1.31 1.82 2.40 2.90 3.20 3.50 4.30 4.6024 0.69 1.05 1.70 2.30 2.90 3.40 4.00 4.60 4.90 5.6028 0.81 1.20 1.90 2.70 3.20 3.90 4.90 5.40 5.90 6.8032 0.94 1.35 2.20 2.90 3.80 4.60 5.90 6.70 7.30 8.1036 1.01 1.50 2.42 3.40 4.50 3.50 6.50 7.10 7.90 8.8040 1.15 1.70 2.71 3.90 4.80 5.90 6.80 8.20 8.80 9.75

Dimensional DetailsFire Dampers

EXCELAIR Air Outlets | Technical Catalogue Fire Dampers | Round & Oval [ FD-C/R/O]

8

Applicable for low to very high air velocity ductwork systems.


Designed to high pressure and ultra- low leakage systems.


Unrestricted air flow is achieved by 100% free area in all velocity conditions.


Twin Stainless steel closure springs ensures the closing under high pressure.

Catch plates offer rigid and positive locking of blade in closed position.




Casing: 80 mm wide, 20 gauge roll formed galvanized steel casing, continuously welded to meet DW 144 specification.

Blades: Single skinned, roll formed, interlocking type (shutter), high integrity, 24 gauge galvanized steel blades of coating mass

Z275, in accordance with EN 142.

Fusible Link: UL listed standard fusible link of fusing temperature1650F & 30 Ib load.(2120F fusible link as an option is available

on demand.

Catch plates: 18 gauge galvanized steel catch plates and locking ramps on each side, leads to positive blade closure in the event

of fire.

,N53 naht erom ecrof gnillup dna selcyc 0005 fo efil eugitaf htiw sgnirps erusolc leets sselniats ’rotageN‘ ecrof tnatsnoC :sgnirpS

ensuring powerful blade closure when required.

Installation Frame: 18 gauge (1.2mm thickness) galvanized steel or 40mmx40mmx3mm thk. MS angle installation frame

(retaining angles) as option.

Sleeve: 150 mm long(Max.),24 gauge galvanized steel sleeve extension to facilitate the union to the duct work (optional).


Fire Rating: 1-½Hours continuous fire resistance against fire barrier.

Sizing



Velocity Range: 0 to 6000fpm (0 to 30 m/s (max.))


Free Area: 100% Free area

Round & Oval [ FD-C/R/O]Fire Dampers


9

Dimensional Details - FD-C

80 m m

+63 mW

m

H +63 m m

30 m m

03m m

Fusible link

Negator closure

spring

Catch plate

80 mm

20 au e G in G g I cas g

Negator closure

spring

140 mm

HxW

30 mm

2mm

Dimensional Details - FD-R

HxW

Fusible link

Negator closure

spring

Catch plate

76 mm

120 mm

2 i0 Gauge GI cas ng

76 mm

120 mm

76 mm76 mm

24 Gauge GI blade

Collar

36 m mW+ 36 m mW+

WW

HH

120 mm120 mm

32

mm

32

mm

76 mm76 mm

H+

63

mm

H+

63

mm

D

76 mm

6 mm+D 3

H+63

124mm

32

mm

D

Fusible link

Negator closure

spring

C a tc h p l a te

76 mm

124 mm

20 Gauge GI casing

76 mm

76 mm76 mm

24 Gauge GI blade

Collar

2mm

Dimensional Details - FD-O


EXCELAIR Air Outlets | Technical Catalogue Fire Dampers | Multi-Section [FD-M]

10



Sizing

Applicable for High, Medium and Low pressure systems.

Suitable for heating, ventilation, air conditioning systems of fire rating up to 1-½hours.

Available as square, rectangular, round or oval shaped construction.

Available in any size to match the duct size,featured opening size or client’s requirement as multi-section.


Easily replaceable temperature sensitive fusible link with option.

Twin Stainless steel closure springs per section ensures the closing under high pressure.

Interlocking steel blades provide easy reset to open position after test or use.


Casing: 120 mm wide x 20gauge roll formed galvanized steel casing , constructed to meet duct work specification DW 144.

Blades: Roll formed, single skinned, interlocking type (curtain), high integrity, 24 gauge galvanized steel blades of coating mass Z275, in accordance with EN 142.

Fusible Link: UL listed standard fusible link of fusing temperature 1650F & 30lb load. Fusible link of triggering temperature 2120F is available as an option.


Springs: ,N53 naht erom ecrof gnillup dna selcyc 0005 fo efil eugitaf htiw sgnirps erusolc leets sselniats ’rotageN‘ ecrof tnatsnoCensuring powerful blade closure when required.

Installation Frame: 18 gauge(1.2mm thickness) galvanized steel or 40mmx40mmx3mm thk MS retaining angle frame as option.

Sleeve: 150 mm long(max.),24 gauge galvanized steel sleeve extension to facilitate the union to the duct work (optional).

Assembling: All multiple sections are bolted together to the 18 gauge galvanized steel frame by appropriate bolting.


Fire Rating: 1-½ Hours continuous fire resistance against fire barrier.

Minimum Size: Above 1000mm (w) x 1000mm (H)

Maximum Size: Infinite.

Velocity Range: 0 to 3000fpm (0 to 15 m/s (max.)

Pressure Range: Upto 4 in w.g

Free Area: Less than100% Free area

Multi-Section [FD-M]Fire Dampers


11

W

H

22 mm

124 mm

mD+63m

D+6

3mm

1 m24 m

D

6 m7 m

H+

63

mm

6W + 3 mm

W

H

W124 mm

22 mm

W +63124 mm

22 mm

FD-A/M

FD-B/M

FD-C/M

FD-R/M FD-O/M

H+

63

H+

63


EXCELAIR Air Outlets | Technical Catalogue Fire Dampers | Smoke Damper [SD]

12



Sizing


Applicable for systems of velocity up to 2000fpm and 4” in.w.g pressure.

Suitable for installation in walls,partitions and floors made of concrete or brick work.

The damper blade and design offers greater efficiency against leakage.

High gauge, rigid galvanized steel construction offers resistance against corrosion and extends damper life.

High torque and fast acting zinc coated steel spring assures fail-safe operation under all pressure conditions.

Opposed blade construction provides easy resetting to position after test or operation.


Casing: 125 mm wide, unique section, 16 gauge galvanized steel casing, constructed to meet DW 144 standard specifications.

Blades: Structurally designed, triple V grooved, 16 gauge galvanized steel blades of coating mass Z275, in accordance with EN 142.

Axles: 10 mm zinc plated, mild steel, solid square bar axles or spindles.

Actuator Shaft: 12.5 mm dia round bar, zinc plated, mild steel shaft .

Actuator Bracket: 16 gauge galvanized steel, specially designed, rigid retaining actuator brackets.

Bushings: Phosphor bronze, oilite, self lubricating, flanged bushing of operational temperature up to 2000C.

Blade Linkage: Concealed opposed blade linkage, connected by 20 mm wide, zinc plated, mild steel flat bar.

Outer casing: 450 mm wide (maximum),16 gauge galvanized steel outer casing (sleeve) with optional connection schemes.

Connection: 30mmx30mmx3mm thk. galvanized steel angle or standard S&C drive or self flange type.

Actuator: Spring returned, fail safe, twin positioned, 24 VAC actuator (240VAC as optional).


Fire Rating: Casing and blades are 1-½ hours continues fire rated against fire barrier.



Velocity Range: 0 to 2000 fpm (max.)

Smoke Damper [SD]Fire Dampers


13

c p la te d

in dle

Hx

W

125 mm

20 mm

‘V’ grooved 16 gauge

steel Blade

10 m m d ia z in

s qua re ba r s p

16 gauge GI

casing

80 mm245 mm

GI outer casing

12.5mm Ø zinc plated

mild steel shaft

450 mm

Silicon rubber seal

Actuator shaft bracket

20 mm 16 Gauge GI casing

Flat Bar Blade

Linkage

10mm, Zinc Plated

Square Bar Spindle

12.5mm Ø Zinc

Plated Steel Shaft

Actuator Bracket

Actuator

GI Outer Casing

125 mm 80 mm245 mm

450 mm

Hx

W


WxH 8 12 16 20 24 28 32 36 40

8 0.26 0.41 0.55 0.70 0.84 0.99 1.16 1.30 1.47

12 0.39 0.59 0.87 1.10 1.35 1.60 1.87 2.08 2.35

16 0.53 0.82 1.22 1.50 1.85 2.26 2.58 2.91 3.30

20 0.69 1.05 1.55 1.98 2.40 2.90 3.33 3.75 4.25

24 0.83 1.25 1.90 2.40 2.90 3.50 4.04 4.53 5.15

28 0.98 1.50 2.22 2.80 3.40 4.15 4.77 5.38 6.10

32 1.20 1.74 2.55 3.25 3.96 4.82 5.55 6.23 7.04

Width (Inches)

Hei

ght

(Inch

es)

Pressure Drop Chart

0.0040

0.0050

0.00600.0075

0.00950.0150

0.0200

0.5050

0.3250

0.2150

0.1500

0.1050

0.08500.06500.05500.45000.0350

0.0250

3 4 5 6 8 10 15 20 30 40

Pres

sure

Dro

p (In

. w

.g)

Stan

dard

Air

0.0

75lb

/ft3

Face Velocity x 100 (fpm)

Leak

age

Rate

(cfm

/sq.

ft)

60

50

40

30

20

10

00.0 1.0 2.0 3.0 4.0

Note: Damper in fully closed position

Static Pressure Drop (In. w.g)

Leakage Chart


EXCELAIR Air Outlets | Technical Catalogue Fire Dampers | Combined Fire-Smoke Damper [CD]

14



Sizing


Applicable for systems of velocity up to 2000fpm and 4” in.w.g pressure.

Suitable for installation in walls, partitions and floors made of concrete or brick work.

The Damper blade end leakage design offers greater efficiency.

High gauge, rigid galvanized steel construction fight against corrosion and extends damper life.

High torque and fast acting zinc coated steel spring assures failsafe operation under all pressure conditions.

Opposed blade construction provides easy resetting position after test or operation.


Casing: 125 mm wide, unique section, 16 gauge galvanized steel casing, constructed to meet DW 144 standard specifications.

Blades: Structurally designed, triple V grooved, 16 gauge galvanized steel blades of coating mass Z275, in accordance with EN 142.

Axles: 10 mm zinc plated, mild steel, solid square bar axles or spindles.

Actuator Shaft: 12.5 mm dia round bar, zinc plated, mild steel shaft .

Actuator Bracket: 16 gauge galvanized steel, specially designed, rigid retaining actuator brackets.

Bushings: Phosphor bronze, oilite, self lubricating, flanged bushing of operational temperature up to 2000C.

Blade Linkage: Concealed opposed blade linkage, connected by 20 mm wide, zinc plated, mild steel flat bar.

Fusible Link: UL listed standard fusible link of fusing temperature 165oF & 30lb load. Fusible link of triggering temperature 2120F is

available as an option.

Outer casing: 450 mm wide (maximum),16 gauge galvanized steel outer casing (sleeve) with optional connection schemes.

Connection: 30mmx30mm x2mm thk. galvanized steel excel flange or standard S&C drive or self flange type.

Actuator: Spring returned, fail-safe, twin positioned, 24 VAC Belimo actuator(240VAC as optional).


Fire Rating: Casing and blades are 1-½ hours continues fire rated against fire barrier.



Velocity Range: 0 to 2000 fpm (max.)

Combined Fire-Smoke Damper [CD]Fire Dampers


15


Hx

W

125 mm

20 mm

‘V’ grooved 16 gauge

steel Blade

10 m m d ia z in

s qu a re b a r s p

16 gauge GI

casing

80 mm245 mm

GI outer casing

12.5mm Ø zinc plated

mild steel shaft

450 mm

Silicon rubber seal

Actuator shaft bracket

20 mm 16 Gauge GI casing

Flat Bar Blade

Linkage

10mm, Zinc Plated

Square Bar Spindle

12.5mm Ø Zinc

Plated Steel Shart

Actuator Bracket

Actuator

GI Outer Casing

125 mm 80 mm245 mm

450 mm

Hx

W Fusible Link

WxH 8 12 16 20 24 28 32 36 40

8 0.26 0.41 0.55 0.70 0.84 0.99 1.16 1.30 1.47

12 0.39 0.59 0.87 1.10 1.35 1.60 1.87 2.08 2.35

16 0.53 0.82 1.22 1.50 1.85 2.26 2.58 2.91 3.30

20 0.69 1.05 1.55 1.98 2.40 2.90 3.33 3.75 4.25

24 0.83 1.25 1.90 2.40 2.90 3.50 4.04 4.53 5.15

28 0.98 1.50 2.22 2.80 3.40 4.15 4.77 5.38 6.10

32 1.20 1.74 2.55 3.25 3.96 4.82 5.55 6.23 7.04

Width (Inches)

Hei

ght

(Inch

es)

Pressure Drop Chart

0.0040

0.0050

0.00600.0075

0.00950.0150

0.0200

0.5050

0.3250

0.2150

0.1500

0.1050

0.08500.06500.05500.45000.0350

0.0250

3 4 5 6 8 10 15 20 30 40

Pres

sure

Dro

p (In

. w.g

)St

anda

rd A

ir 0.

075l

b/ft

3

Face Velocity x 100 (fpm)

Leakage Chart

Leak

age

Rate

(cfm

/sq.

ft)

60

50

40

30

20

10

00.0 1.0 2.0 3.0 4.0

Note:Damper in fully closed position

Static Pressure Drop (In. w.g)


EXCELAIR Air Outlets | Technical Catalogue Fire Dampers | Installation

16

TYPE

- A

TYPE

- B

TYPE

- C

, R

& O

40 x 40 x 3 mm thk. GI Angle

Duct connector(UL listed)

WALL

25 mm min. over lap(on all sides)

3.2 mm min. expansion gap

Tack welds (or) Rivets

6 mm Ø Nut & BoltDuct work

WALL

Sleeve

TYPE - A

TYPE - B

TYPE - C, R & O

40 x 40 x 3 mm thk. GI Angle

Duct connector(UL listed)

25 mm min. over lap(on all sides)

Tack welds (or) Rivets

6 mm Ø Nut & BoltDuct work

Sleeve

FL

OOR

FL

OOR

150mm

Max.

On all sidesDuct-Sleeve Connection (UL Listed)

Double “S” slipPlain “S” Slip Hammed “S” Slip Standing S Standing S (Alt.)Standing S

(Bar Reinforced)

Standing S

(Angle Reinforced)

15

0m

m

Max

imu

m

On

All

Sid

e

Installation Instructions

The fire damper should be installed centrally within the wall or floor opening with a minimum expansion gap of 3.18mm/foot of width (35mm maximum) between the sleeve and the opening. Sleeve may be seated on the opening by maintaining equal expan-sion gap on all other sides.

Sleeve shall be of the same thickness as the duct into which it is to be fitted, so as to conform to SMACNA or ASHRAE standard.

Maximum of 150 mm sleeve extension to be provided to facilitate the connection to the duct work on either side of the wall or floor opening.

Sleeve shall be fastened to 40mmx40mmx3mm thk. galvanized iron retaining angles by means of 13mm long spot welds or 6mm dia bolts nuts or No: 10 steel screws or 6mm Dia steel rivets. Make sure that fasteners are not interrupting the operation of fire damper blades.

The fire damper sleeve or frame connecting to the ductwork should be fastened with UL 555 listed standard breakaway joints to allow the collapse of the ductwork to secure fire damper, in the event of fire. The various UL listed connection methods are Plain S slip, Hemmed S slip, Double S slip, Inside slip joint, Standing S joint, Bar reinforced standing S and reinforced standing S(Refer figure for more details).

Round or Oval shaped fire dampers can be fastened to the duct work by screwing No: 10 sheet metal screws equally around the circumference of the duct work. Rigidity of fixing can be set by using 3 screws for size up to 550mm and 5 screws up to 900 mm diameter and so on.

The expansion gap shall be filled with a non-combustible, compressible, UL listed mineral wool or equivalent fire sealant. UL listed duct sealant may be used on the break away (Duct sleeve) joints.

Vertical Installation Horizontal Installation

InstallationFire Dampers

EXCELAIR Air Outlets | Technical Catalogue Fire Dampers | Ordering Requisites

17

1. Damper

2. Type

3. Damper Size

4. Actuator

5.Fusible Link

Example

Fire Damper. FD

Smoke Damper. SD

Combined Fire & Smoke Damper. CD

Fusible Link 1650 F 1

Fusible Link 2120 F 2

FD C 600 x 600 10

Blades Inside Air Stream A

Blades Outside Air Stream. B

Rectangular (100% Free Area). C

Round Type. R

Oval Type. O

Multi Sectional. M

Damper Width in mm. W

Damper Height in mm. H

Damper Diameter in mm. D

Without Actuator. 0

With Actuator. 1

Ordering RequisitesFire Dampers

Fire Damper, Type-C of size 600 x 600 mm without Actuator, with 1600

Fusible Link.

EXCELAIR Air Outlets | Technical Catalogue Disc Valve | Installation

6

EXCELAIR Air Outlets | Technical Catalogue Fire Dampers | Notes

18

NotesFire Dampers


6


19

NotesFire Dampers


6


20

NotesFire Dampers

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