Teardrop Design 4" Deep Aluminum Backdraft Damper

Teardrop Design 4″ Deep Aluminum Backdraft Damper

Finishes: Enamels, epoxies, etc.
Frames: Aluminum – (Channel) 1⅝” x 6½” x 1⅝”, (Flanged) 2″ x 4″ x 2″, Steel – Channel or Flanged
Bearings: Oilite bronze or ball bearings
Jamb Seals: Polyurethane, neoprene, extruded silicone

Model:	850
Minimum Panel Size:	10″ x 10″
Maximum Panel Size:	48″ x 96″
Frame Depth:	1″ X 4″ X 1″
Frame Material:	.080″ Thick Extruded Aluminum 6063-T6/T52 Alloy
Frame Type:	Hat Shaped
Blade Type:	Tear Drop Design
Blade Material:	.080″ Thick Extruded Aluminum 6063-T6/T52 Alloy
Blade Action:	Parallel
Blade Seals:	Extruded Silicone Rubber Off-Set Leg
Jamb Seals:	None
Bearings:	Celcon
Axles:	½ Diameter Extruded Aluminum Pin-Lock Positively Locked to Blade, Placed Off Center
Linkage:	⅛” Thick Plated Steel Bracket with Plated Steel Pivot in Celcon Sleeve Bearings On-Blade
Counterweights:	Adjustable Range of Opening Pressures Assist or Retard
Temperature Limits:	-40°F to 190°F
Finish:	Mill

*Dampers smaller than minimum frame size require transitions.

Description

FRAME: .080 thick (nominal) extruded aluminum, 6063-T52/T6 alloy, with reinforced bosses and groove inserts for seals. Standard frame sizes are 1″ x 4″ x 1″ or 2″ x 4″ x 2″.
BLADES: .080″ thick (nominal) extruded aluminum, 6063-T52/T6 alloy, teardrop shape. Groove inserts at blade edges for extruded silicone rubber seals. Blades are approximately 6″ on centers.
AXLES: ½” dia. extruded aluminum pin-lock design, positively locked to blade, placed off-center.
SEALS: Extruded silicone rubber off-set leg at blade edges. None at jambs.
LINKAGE: Standard is face linkage on the blades, plated steel.
BEARINGS: Celcon bearing material, so that there will be no metal-tometal friction.
FINISH: Mill.
TEMP. LIMITS: -40°F to 190°F.
COUNTERWEIGHTS: Adjustable for a full range of opening pressures.