Description
The Perkomatic automatic door closer (R85) incorporates a combined hydraulic mechanism and spring assembly and offers a controlled rate of closure and good fire resistance making it suitable for use on latched 1/2 hour and 1 hour fire doors. It incorporates a latching action to overcome the resistance of the latch even when the door has been opened by only a small amount. The latching action is controlled by adjusting the point at which this action takes effect. If required, the door can be closed manually, more quickly than by the Perkomatic, for instance to prevent heat loss from a room.
Light to Medium Weight Doors
The Perkomatic is suitable for use on light and medium weight internal doors, except those fitted with rising butts, Parliament or projecting hinges or where limited air displacement conditions exist. The distance between the centres of the two fixing plates must not exceed 45mm when the door is opened to its maximum. Should this distance be exceeded, e.g. through the use of wide-knuckled hinges, a door stop should be fitted at the appropriate distance.
Fire Door Approval
The Perkomatic may be used on fire doors subject to the approval of the appropriate building control officer. It has been incorporated in doors that were successfully subjected to fire tests by the Warrington Fire Research Centre to BS 476: Part 22: 1987 and assessed to BS EN 1634-1: 2000. At the end of the tests, the integrity of the door was maintained. A copy of the assessment is available on request. The internal hydraulic fluid has been specially formulated to resist high temperatures and has a flash-point of 225C.