Delta "T" Systems
A60 Rated Rectangular Dampers
A60 Rated Rectangular Dampers

Delta “T” Systems’ A-60 Rated Rectangular Fire Dampers have been constructed from 316 stainless steel, with interlocking blades, end bearings and stainless steel peripheral gasketing. The blade linkage has been completely enclosed and positioned out of the air stream for protection against damage. Actuation is available in both electric and pneumatic.

• Tested and approved for class A-60 divisions (bulkheads and decks)
• Lloyds Register of Shipping Approval to IMO Fire Test Procedures Code, Annex 1, Part 3
• Complies to Marine Equipment Directive 96/98/EC
• Corrosion tested to BS EN 60068-2-52. Severity 2 conditions
• Vibration tested to BS EN 60068-2-6 (5 Hz - 35Hz @ 2g)

FRAME - 6” x 18 gage (150 mm x 1.2 mm) galvanized, flanged channel.
MAXIMUM SIZE - 39.4” x 39.4” (1.0 m x 1.0 m)
BLADES - Airfoil-shaped, double-skin, Type 430 Ferritic stainless steel construction. 
Maximum 3” (76 mm) wide.
BEARINGS - Stainless steel blade end bearing and peripheral gasketing.
JAMB SEALS - Stainless steel, flexible metal compression type. Full perimeter.
LINKAGE - Concealed in frame.
ETR72 - (Electrical Thermal Release) 
threshold temperature -  161°F (72°C)

Delta “T” Systems’ round and rectangular dampers may be actuated electrically using either AC or DC power. Closure of the electrically actuated damper may be initiated in one of three ways:
1) Signal from the fire system
2) Loss of electric power to the actuator
3) Sensing of heat by the actuator’s 
    Electrical Thermal Release (ETR)

In order to facilitate the automatic closing of the damper, an Electrical Thermal Release (ETR) is mounted on the damper housing to sense elevated temperatures of 162 ° F (72 ° C ) or above and trigger the closing of the damper. The fail-safe feature of this actuator causes the damper blade(s) to close in the event that power to the actuator is lost. A green LED light is built into the ETR to give the user a clear and simple visual check that the actuator is receiving power, the ETR is correctly fitted, and the thermal fuse is intact.

Pneumatic actuation is available on both round and rectangular models of the A-60 damper. A fusible link has been incorporated into the design of the pneumatic version of Delta “T” Systems’ A-60 Round Damper in order to facilitate failsafe closure of the damper. The fusible link functions independently of the pneumatic release in order to allow the damper to close in the event that the ambient temperature reaches a pre-determined threshold. A spring on the damper’s blade shaft serves to provide the necessary torque to close the damper and a locking pin engages when the blade is fully close in order to secure the closure. Pneumatic actuation may be achieved through an onboard pneumatic supply line or with an optional Actuator Gas Cyllinder (Part Nos. 273-P150/12 or 273-P150/24). Dampers may also be manually actuated and reset from the outside of the damper housing.

A60 Rated Rectangular Dampers.pdf

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Application Data Worksheet