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Tunnel Transit Dampers
• Life Safety
• Heavy Duty Tunnel Transit
March
2007
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Heavy Duty/Industrial
Tunnel Dampers
Applications
Dampers in subway tunnels and transit systems serve three primary functions, depending on design of the
ventilation system.
Pressure Equalization
Dampers mounted in the side of the tunnel vent pressurized air in front of a train
and reintroduce air as it passes. In single trackways, this air movement can be
substantial.
Portal Intake and Exhaust
Dampers at tunnel ends control air intake and emergency smoke exhaust in
long tunnels without intermediate air supplies.
Emergency Fire/Smoke Control
Dampers are spaced along the tunnel and can be remotely controlled to
(a) pressurize a tunnel section to allow safe egress of train/automobile
passengers to an escape tunnel, while blowing fire and smoke from this area,
and (b) create negative pressure in the area of the fire to vent smoke and gases.
Tunnel Ventilation Dampers
Road and underground metro tunnels are some of the most difficult environments in the world. High humidity,
dust-laden air, and limited access can make the installation and operation of ventilation systems problematic.
However, these issues become insignificant in the event of an emergency — the dampers and fans that make
up the ventilation system simply must operate when lives are on the line. Greenheck’s tunnel specific dampers,
the HTD series, were designed to meet these challenges.
Construction
Greenheck’s HTD series dampers begin with the
same flange mount, channel style frame as the HCD
line of products. Two blade profiles are offered:
the HTD-630 is designed with a fabricated airfoil
blade, and the HTD-640 uses an extruded aluminum
blade. Several materials can be used to meet
the requirements of each environment, including
galvanized steel, 304 or 316 stainless steel, or
aluminum.
Reliability
In compliance with NFPA 130 and 502, HTD models
are tested in Greenheck’s test facility for operation
up to two hours at 482°F (250°C). HTD-630 has been
tested in accordance to British Standard 476 for 2
hours at Warrington Fire. Our engineering staff has
the experience to perform any additional test as
required including the cyclic pressure test, mimicking
the piston effect caused by passing trains.
Maintainability
HTD dampers are designed to keep maintenance
procedures simple and low frequency. The bearings
on a HTD damper is 316 stainless sleeve type,
requiring no lubrication or maintenance throughout
its useful life. Linkages are designed for L/360
deflection, and each axle is bolted to the damper
blade, allowing for easy removal if repair is needed.
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Features and
Accessories
Blades
Airfoil blades are constructed of double skin galvanized or heavy gauge
aluminum. The airfoil blade design has higher strength when compared to a 3V
blade. HTD-630 features a fabricated airfoil blade. HTD-640 features an extruded
airfoil blades.
Blade Seals
Greenheck recommends silicone blades seals for low leakage performance.
Bearings
316 stainless steel sleeve bearings are standard on Greenheck HTD series
dampers. Options include a self-aligning bronze sleeve with galvanized steel
housing or an external re-lubricatable ball bearing.
Fabricated Airfoil
Extruded Airfoil
316 stainless
steel sleeve
Self-aligning
bronze sleeve
Re-lubricatable
ball bearing
Jamb Seals
Type 304 or 316 stainless steel jamb seals are used to prevent air from leaking between
the ends of each blade and frame.
Axle Seals
O-ring seals are available to prevent air or debris leakage through the axle.
Actuators
Greenheck has a variety of actuators available for the HTD series. The common
models are:
RCS Sure series
• 120V or 230V, 50/60 Hz
• Spring Return
• NEMA 4, 4X & 7
RCS MAR series
• 24V, 120V, or 230V, 50/60 Hz
• NEMA 4 , 4X & 7
• Modulating or power open/close
Siemens 331-2856
• Pneumatic
• Two position
• Maximum 25 psi supply
Hytork XL681SRHT
• Pneumatic
• Two position
• Minimum 80 psi supply
RCS MAR 90
RCS Sure 100
Hytork XL681SRHT
O-ring seal
Siemens
331-2856
Proximity Switch
Proximity switch is mounted to the damper axle to indicate blade position on the damper.
O-rings are used to seal the switch compartment for hazard, corrosion, and leakage protection.
This proximity switch is NEMA 4, 4X, & 7 rated and has been tested to a temperature of 250°C
for 2 hours of operation.
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HTD-630
Leakage (English version)
42 in. x 42 in. (1067mm x 1067mm) damper
HTD-630
Leakage (Metric version)
1067mm x 1067mm (42 in. x 42 in.) damper
Leakage Data & Quick
Reference Chart
Leakage Data
Damper leakage (with blades fully closed) varies based on the type of low leakage seals applied. Leakage
testing was conducted in accordance with AMCA Standard 500-D and is expressed as CFM per sq. ft. of
damper face area. All data has been corrected to represent standard air at a density of .075 lb./ft3 (1.2 kg/m3).
Quick Reference Chart
Material
Frame
Blades
Thickness
Depth
Material
Thickness
Performance
Certifications
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HTD-630 HTD-640
Type Flange mount channel Flange mount channel
Standard Galvanized Galvanized
Optional 304SS, 316SS 304SS or 316SS
Standard 12 ga. (2.7mm) 12 ga. (2.7mm)
Optional 10 ga. (3.5mm), 3/16 in. (5mm),
1/4 in. (6mm)
Standard 8 in. (203mm) 8 in. (203mm)
Optional 10 or 12 in.
(254 or 305mm)
Type Fabricated Airfoil Extruded Airfoil
Standard Galvanized Aluminum
Optional 304SS, 316SS N/A
Standard 14 ga. (2mm) .080 in. (2mm)
Optional 10 ga. or 12 ga. (3.5mm or 2.7mm) N/A
Blade seals Silicone Silicone
Pressure
Leakage
Blade Deflection
Operation 482°F (250°C) for 1 or 2 hours 482°F (250°C) for 1 or 2 hours
Standards NFPA 130, 502 NFPA 130, 502
Other Tested in accordance with UL555S;
Tested in accordance with BS476
for 2 hours @ Warrington Fire
up to 24 in. wg
(6 kPa)
8 cfm/sq. ft. @ 4 in. wg
(128cmh/sq. m @ 1 kPa)
L/360 L/360
10 ga. (3.5mm), 3/16 in. (5mm),
1/4 in. (6mm)
10 or 12 in.
(254 or 305mm)
up to 12 in. wg
(3 kPa)
8 cfm/ sq. ft. @ 4 in. wg
(128 cmh/sq. m @ 1 kPa)
Tested in accordance with UL555S
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Test Certifications
& Requirements
NFPA-130
NFPA-130 is the National Fire Protection Agency standard for fixed
guideway transit and passenger rail systems. This standard covers
fire protection requirements for underground, surface, and elevated
fixed guideway transit and passenger rail systems, including trainways,
vehicles, and vehicle maintenance and storage areas including areas
regarding life safety. Greenheck’s tunnel transit dampers are designed
to meet the rigorous requirements of NFPA-130 on the dampers and
actuators.
NFPA-502
NFPA-502 is the National Fire Protection Agency standard for fire
protection and fire life safety requirements for limited access highways,
road tunnels, bridges, elevated highways, depressed highways, and
roadways that are located beneath air-right structures. This standard
establishes minimum requirements for each of the identified facilities.
Greenheck’s tunnel transit dampers are designed to meet the rigorous
requirements of NFPA-502 on the dampers and actuators.
BS476 Part 20
British Standard, BS476 Part 20, is a fire test method for building
materials and structures that has been historically used throughout
the world to evaluate the fire resistant performance of a damper in the
event of a fire. The damper is mounted to fire test chamber and burned
up to 2 hours or 4 hours of operation. The test report, provided by a
testing authority such as Warrington Fire, signifies that the damper can
resist a fire up to the hours indicated.
UL555
This standard governs fire dampers which are intended for use where
air ducts penetrate or terminate at openings in walls or partitions, in
air transfer openings in partitions, and where air ducts extend through
floors as specified in the Standard for Installation of Air-Conditioning
and Ventilating Systems, NFPA 90A. In a fire emergency the fire damper
is designed to close and prevent the spread of fire from one side of the
wall or partition to the other. Testing includes cycling, salt spray, dust
loading, dynamic closure, fire endurance, and hose stream.
UL555S
This standard governs smoke dampers which are intended to prevent
the spread of smoke when HVAC systems shut down during a fire
emergency and those which control the movement of smoke within a
building when the HVAC system functions in a smoke control mode.
Leakage rated dampers are intended for installation in accordance
to NFPA 90A. Testing includes salt spray, dust loading, cycling,
temperature degradation, operation while under heated airflow, and
elevated temperature leakage.
AMCA
The AMCA Certified Rating Program seal assures you that a product
line has been tested to the appropriate AMCA standards in accordance
with a legal license agreement and that the manufacturer's catalogued
certified ratings have been submitted to the AMCA staff for approval
prior to publication.
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Combination Fire Smoke
and Fire Dampers
Combination Fire Smoke Damper
A Combination Fire Smoke Damper performs the function of
both a fire damper and a smoke damper. Combination Fire
Smoke dampers must be qualified under UL Standard 555
as a fire damper and UL Standard 555S as a smoke damper.
Combination Fire Smoke Damper is qualified to 3000 fpm (15.2
m/s) and 4 in. wg (1 kPa) for operation and dynamic closure in
emergency fire smoke situations.
Model FSD-211 & FSD-M211 has also been tested in
accordance with BS476 to 4 hours at Warrington Fire, UK, and
is approved for fire partitions of 4 hours or less where British
Standards are required.
Standard Construction Features
• Galvanized Steel
• Fabricated to your size requirements
• UL555 & UL555S classified
• 165°F (74°C) RRL
• Horizontal or vertical mount
• Factory furnished sleeves
• Blade styles
- 3V
- Airfoil
- Round
Dynamic Fire Dampers
Dynamic Fire Dampers are approved for use in walls,
floors, and partitions. The dampers must be qualified
under UL Standard 555 as a fire damper. Dynamic Fire
Dampers, DFD series, is qualified up to 4000 fpm and
up to 10 in. wg for operation and dynamic closure in
emergency fire situations.
DFD-M150, DFDGB-210, and DFD-M210 has also been tested in
accordance with BS476 to 4 hours @ Warrington Fire, UK, and
is approved for fire partitions of 4 hours or less where British
Standards are required.
Greenheck Fan Corporation certifies that the models CFSD-211, 212;
DFD-210, 230; FSD-211, 212, 213, 231, 311, 311M, 312, 312M;
SSFSD-211; SEFSD-211; OFSD-211, 212, 311, 312; SMD-201, 202,
203, 301, 302, 301M, 302M; SESMD-210; SSSMD-201; shown herein
are licensed to bear the AMCA Seal. The ratings shown are based on
tests and procedures performed in accordance with AMCA Publication
511 and comply with the requirements of the AMCA Certified Ratings
Programs. The AMCA Certified Ratings Seal applies to air performance
only.
Greenheck Kunshan Co. Ltd. and Greenheck Fan Corporation certifies
that the model DFDGB-210; DFD-M210, M230; FSDGB-211;
FSD-M211, M231; and SMD-M201 shown herein is licensed to bear
the AMCA Seal. The ratings shown are based on tests and procedures
performed in accordance with AMCA Publication 511 and comply with
the requirements of the AMCA Certified Ratings Programs. The AMCA
Certified Ratings Seal applies to air performance ratings only.
Standard Construction Features
• Galvanized steel
• Fabricated to your size requirements
• UL 555
• BS476 approved
• Horizontal or vertical mount
• Blade styles
- Curtain style blade
- 3V multi blade
- Round
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The Greenheck
Difference
Greenheck dampers bring the same quality engineering and manufacturing that has earned Greenheck its
position as an industry leader. Aggressive research and development keeps Greenheck a major player in the
damper and louver industry. Greenheck has the most UL classified dampers and largest selection of AMCA
licensed dampers and louvers in the industry.
In-House Testing
State-of-the-art laboratory and testing facilities have always been important to
Greenheck’s continuing business success. A laboratory facility devoted exclusively
to development and testing of damper and louver related products for testing to the
latest versions of AMCA, ANSI, ASHRAE, UL, Miami-Dade County, and other industry
standards of performance.
A Global Presence
Greenheck operates five manufacturing locations, eight national distribution centers, and three international
distribution centers:
Manufacturing
• Rocklin, CA
• Schofield, WI
• Frankfort, KY
• Charlotte, NC
• Kunshan, China
International Distribution
• China
• Mexico
• United Arab Emirates
National Distribution
• Schofield, WI
• Rocklin, CA
• Dallas, TX
• Miami, FL
• Greensboro, NC
• Union, NJ
• Columbus, OH
• Las Vegas, NV
Quick Build and Delivery
Greenheck’s Quick Build (QB) program, along with strategic manufacturing locations, ensure rapid response
time. Quick Build products are manufactured on a one, three, five, or ten day schedule, then efficiently shipped
to your job site.
Leading Edge Technical Support
All Greenheck products are supported by the industry’s best product literature, electronic
media, and Computer Aided Product Selection program (CAPS). You’ll also find
extensive product information, Installation, Operation, and Maintenance Instructions and
more on the internet at
Customer Service
Your local Greenheck representative has a wealth of industry and product
knowledge to answer your questions. Our representatives receive the latest
product information and can have orders processed direct to our factory. With
our advanced order processing system, we can ship orders as fast as the next
day. With Greenheck’s experienced staff, we can answer questions and provide
solutions to your unique damper application. With our dedicated engineering staff,
we will work to develop a custom solution to meet your needs.
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0
20
40
60
80
100
120
140
316SS 304SS Steel Aluminum
No. of Corrosive Mediums
Materials with Excellent
Corrosion Resistance
Severe Environment Dampers
When tested against 140 different corrosive mediums,
316 stainless steel received an excellent rating for
over 115 of those mediums.
Our new line of Severe Environment Dampers offers an excellent
corrosion resistant option for a variety of applications:
• Paper mills
• Wastewater treatment plants
• Labs
• Coastal
• Maritime
• Computer clean room
• Tunnel transit
Greenheck has a complete line of dampers for your needs!
• Commercial Control
• Industrial Control
• Fire, Smoke, & Combination Fire Smoke
• Ceiling Radiation
• Backdraft
• Pressure Relief Dampers
• Manual Balancing
• Access Doors
• Marine
• Severe Environment
• Industrial Smoke
• Insulated Thermally Broken
• Air Measuring
• Pressure Relief Access Doors
• Barometric Relief
• Industrial Backdraft
• Tunnel Transit
Our Warranty
Greenheck warrants this equipment to be free from defects in material and workmanship for a period
of one year from the purchase date. Any units or parts which prove defective during the warranty
period will be replaced at our option when returned to our factory, transportation prepaid. Motors are
warranted by the motor manufacturer for a period of one year. Should motors furnished by Greenheck
prove defective during this period, they should be returned to the nearest authorized motor service
station. Greenheck will not be responsible for any removal or installation costs.
As a result of our commitment to continuous improvement, Greenheck reserves the right to change
specifications without notice.
P.O. Box 410 • Schofield, WI 54476-0410 • Phone (715) 359-6171 • greenheck.com
Prepared to Support
Green Building Efforts
Tunnel Transit Rev. 1 March 2007 SP
Copyright © 2007 Greenheck Fan Corporation
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