Balance Doors

Balance doors rotate around a rolling pivot in an elliptical path, giving a wide opening with a small swing arc. About two thirds of the door swings outward and one third inward, so wind and stack pressure assist rather than hinder operation.

Key features

• Pivots on two single-piece metal arms, typically cast bronze or stainless steel, at top and bottom
• Full-height hinge tube containing a torsion bar for closing force
• Hydraulic checking device in the header and a tension adjusting gear box at the sill
• Latching speed, closing speed, back check and spring power adjustable without removing covers
• Requires less operating space than conventionally hinged doors
• Supports large and monumental doors

Applications

US Navy, US Coast Guard and train applications.