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General

The D690 Low-Leakage, Single-Blade, Round Damper ("Damper") is used in conventional air handling systems to control airflow in a round duct. The Damper is specifically designed to mount to the Honeywell ML6161 or ML7161 Actuator.

Features

• Neoprene seal for tight closing and low leakage
• Oilite bearings for long life
• 90-degree damper travel for a variety of applications
• Designed to mount to the Honeywell ML6161 or ML7161
  Actuator for an economical package

Specifications

Models:
Order D690 Damper model according to diameter:

Construction:
   Frame:

Sleeve-type, spiral duct, crimped on downstream side 6 to 10 in. (152 to 254 mm) diameter Damper: 24 gage galvanized steel

12 to 16 in. (305 to 406 mm) diameter Damper: 22 gage galvanized steel

Sleeve length: Diameter plus I in. (25 mm), minimum length 12 in. (305 mm)

  

  

 

   Blade:
      16 gage galvanized steel

   Shaft:
       1/2 in. (13-mm) diameter, zinc-coated steel. Extends 2 in. (51 mm) beyond actuator mounting plate

   Bearings:
       Flanged bronze oilite, pressed into frame

   Seals:
      Closed-cell neoprene on frame

Maximum Approach Velocity:
     2500 ft/min (17.8 m/s), max. static pressure 4 in. wc

Damper Travel:
    90 degrees

Finish:
    Mill galvanized

Pressure Drop: 
    Max. at full open: 0.035 in. we at 1000 ft/min (5 m/s)

Leakage:

   12.5 cfm per sq ft of Damper face at I in. wc

    Refer to the following leakage multiplier chart for leakage at pressures other than I in. wc

EXAMPLE:
Leakage at 4 in. we (2.00 x 12.5) = 25.0 cfm per sq ft.

Torque:
   Accommodates Honeywell ML6161 and ML7161 Actuators

Actuator Mounting:
   Attached plate for mounting Honeywell ML6161 or ML7161 Actuator

Temperature Range:
   32 to 13OF (O to 54C)

Shipping Weight:
   See Models table

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