DORMA BTS 80 EN4 aluminum 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.BTS80 EN4 Floor Spring7410 SS Cover Plate8062  Top Pivot Set7422 Door Strap2300 Sealing Compound Set