DORMA BTS 80 EN4 aluminium door kit includes floor spring body, including cement box and standard spindle, cover plate, bottom door strap, top centre and sealing compound.
It is a universal non-handed floor spring for single and double action doors. With adjustable closing speed and closing action from approx. 175�, with hydraulically controlled closing cycle and mechanical backcheck.
Integral pressure compensation feature allows for temperature-independent hold-open between 75� and 175� (removable). Hold-open start point and delayed action is easily adjustable by valve.
Suitable for installation on doors up to 1100 mm (W) with a max. 300kg leaf weight.
Has Backcheck: Yes
Spring Strength: EN4
Maximum Weight in kg: 300
Has Hold-open: Yes, Adjustable 75� - 175�
Max Door Width In mm: 1100
