SHOCK ABSORBING SPRING & ADJUSTABLE HOLD-OPEN TENSION
The door stay includes a heavy duty shock absorbing spring which provides 3° to 5° cushion before dead-stop. (The dead-stop position is the position at which the shock absorbing spring is fully compressed.) The friction stay can be toggled between hold-open and non hold-open by turning the knurled roller located at the bottom of the stay channel. Turning the adjusting screw on the top of the channel slider clockwise increases hold-open tension; anti-clockwise decreases it. This is useful to offset exterior wind conditions.
DOOR WIDTHS AND WEIGHTS, HANDING & ANGLE OF OPENING
Eight sizes to suit heavy duty doors up to the maximum widths as shown in the tables below. Particularly suited to heavy metal doors. Only suits hinged single action doors swinging one way. When fitting to hollow metal doors and frames please ensure suitable reinforcement is provided. These door stays are not handed and can be fitted to LH or RH doors. Standard installation from 85° to 110° angle of opening (5° increments) as per fixing instructions. As with any door stay, mounting the door stay closer to the hinge axis allows the door to open to a greater angle.
MATERIAL AND FINISHES
Stainless steel is the base material for the channel, arm and bracket but the spring and other components in the channel are yellow passivated mild steel and the fixings are mild steel. The 9000 Series has been successfully tested to Grade 4 (240 hours neutral salt spray exposure) in accordance with BS EN 1670:2007 Building Hardware - Corrosion Resistance. Report No. WIL 392103 dated 30.01.2018 refers. On the N9000 Series, all the components are Grade 304 stainless steel including the channel components, spring and fixings. This makes the N9000 Series more suitable for wet or coastal environments to prevent corrosion.
The channel is bolted through the door with two sex bolts provided, to suit doors 44-57mm thick. The jamb bracket is fitted to the frame with either four wood screws or four machine screws provided. On the N9000 Series, these are all stainless steel.
ANGLE JAMB BRACKET FOR INWARD OPENING DOORS
These door stays are usually mounted internally underneath the head on the push side of opening out external doors. However optional angle bracket ref Z90541 enables this door stay to be mounted on the pull side of the door (pull side mount), thus making it suitable for inward opening doors. This bracket can also be used on the push side of the door when door and transom are flush (push side flush mount). The bracket is US32D satin stainless steel so compatible with both door stays below.
SUITABILITY FOR FIRE DOORS
The 9000 Series is a hold-open door stay so it cannot be used on fire rated doors in its standard format. However it can be supplied to special order without the hold-open (known as 'Stop' function) and these are UL Listed in the US for use on wood fire rated doors up to 90 minutes and metal fire rated doors up to 180 minutes.