FRAME:  8”x 2”x 14 ga. (203 x 51 x 2) galvanized steel channel.

BLADES: 16 ga. (1.6) galvanized steel, triple-vee design, approx. 6” (152) to 8” (203) wide depending on size. Parallel or   opposed operation.

LINKAGE: Side linkage, concealed out of airstream. Heavy duty plated steel tie bars and galvanized steel clevis arms.

AXLES: Model 4750:1/2” (13) diameter plated steel.

            Model 4775: 3/4” (19) diameter plated steel.

BEARINGS: Stainless steel sleeve type, pressed in frame.

DRIVESHAFT: 1/2” (13) or 3/4” (19) diameter (see AXLES above) plated steel. Extends to 8” (203) beyond frame.

FINISH: Mill galvanized.

MINIMUM SIZE: Single blade: 6” x 6” (152 x152).

                          Two blades: 6” x 12” (152 x 305).

MAXIMUM SIZE: 48” x 96” (1219 x 2438). Contact factory for larger sizes. 

- Type 304 Stainless Steel construction

- Type 316 Stainless Steel construction 

- 12 ga. (2.8) Frame 

- 14 ga. (2.0) Blades 

- Type 304 Stainless Steel Axles only 

- External Bolt-On Ball Bearings 

- External Bolt-On Ball Bearings with Seal 

- Outboard Bearings with Adjustable Shaft Seal 

- EPDM Blade Seals (Max. 250⁰F [121⁰ C])

- Silicone Blade Seals (Max. 400⁰F [204⁰ C]) 

- Stainless Steel Jamb Seals 

- Non-standard Flanges: 1 ½” (38) to 4” (102) 

- Bolt Holes in Flanges

- Jackshafting

- Heavy Duty Manual Locking Quadrant 

- Factory Supplied Actuator 

- Epoxy Coated Frame and Blades

For special variations or options not shown, contact factory