The Glynn Johnson 79 series is designed for use on extremely heavy or large doors (such as vault doors, cell doors, oversized plant entry doors) that are subject to violent use or abusive conditions. It provides a durable Hold-Open mechanism that can be turned off, allowing the unit to function as a shock-absorbing stop. The Hold-Open tension is simply adjusted incrementally for increased or decreased holding power by turning the nut at the end of the 3/4" diameter stainless steel bar.

Hold Open and Stop
Hold-Open models provide a selective Hold-Open function with easy-to-adjust tension. A simple 90 º rotation of the roller mechanism disables the Hold-Open function, allowing the unit to serve as a shock-absorbing stop. The Hold- Open function provides a convenient method of holding the door open at a predetermined position for short or long periods of time, permitting an unobstructed traffic flow through the opening.

Stop Only
When the Hold-Open function is not a requirement, Stop-Only models provide a reliable method of door control. Stop-Only models provide the same shock-absorbing capability as Hold-Open models. The Stop-Only model may be used on fire doors.