HD7000 Series Extra Heavy Duty Surface Fixing Door Stay - Z108HD

This is the heaviest duty door stay that we sell and is designed for metal doors in extreme conditions and extra heavy duty applications. The door stay alone weighs up to 4.5kg so steel doors and frames will require proper reinforcement to accept it. The principles of operation and many of the details are the same as the 7000 Series on the opposite page, but scaled up because of the size of the product. The HD7000 Series door stays are surface mounting and fit underneath the head of the frame and attach to the face of the door. They have an extra strong spring to absorb some of the opening shock when the door is opened, and a hold-open roller arm to hold the door open from 85° to 110° (5° increments) determined by the mounting position of the stay on the door and frame. To disengage the hold-open and close the door, the door is pulled off the roller arm in the direction of closing. These door stays are widely used by utility companies, marine engineering companies, banks and prisons where large heavy doors are installed.

SHOCK ABSORBING SPRING AND ADJUSTABLE HOLD-OPEN TENSION

The door stay includes a heavy duty shock absorbing spring which provides 3° to 5° cushion before dead-stop. The roller arm engages on the frame bracket as the door is opened and holds the door open from 85° to 110°. To close the door, the door is pulled off the roller arm in the direction of closing. The tension of the hold-open can be adjusted using a spanner on the nut at the end of the rod; clockwise to increase hold-open tension and anti-clockwise to decrease it.

DOOR WIDTHS, WEIGHTS, HANDING AND ANGLE OF OPENING

Five sizes to suit extra heavy duty doors up to the maximum widths as shown in the tables below. Particularly suited to heavy metal doors, maximum door weight 454kg. Only suits hinged single action doors swinging one way. When fitting to hollow metal doors and frames please ensure suitable reinforcement is provided and the correct fixings are used. 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, FINISHES AND FIXING PACKS

Plated cold rolled steel is the base material for the HD7000 Series which is painted S1 silver aluminium as standard. On the NHD7000 Series, all the

components are stainless steel (non-ferrous) which makes NHD7000 Series more suitable for marine use. No wood screws are supplied with this product as it is designed for use on steel doors and frames. Four flat head countersunk machine screws 5/16-18 x 1-1/2" are supplied for the frame bracket; four more identical machine screws with ½" diameter sex bolt are supplied for the door bracket. The standard sex bolts suit 44-51mm thick doors. These are supplied stainless steel with NHD7000 Series.

SUITABILITY FOR FIRE DOORS

The HD7000 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 doors rated up to 90 minutes and metal fire rated doors up to 180 minutes. HD7000 and NHD7000 Series have also been assessed by Exova to BS EN 1634.1 as suitable for use on uninsulated steel doors up to 240 minutes, copy of Report No WF 387314 available upon request.