Double action floor springs and concealed double action overhead door closers are available.
Door closers
GTS850
Concealed double action overhead door closer. For fitting into aluminium or steel box section transoms. Supplied with 90° hold open facility as standard. Closing speeds are adjustable with valve no.1 operating from 130° to 20° and valve no.2 from 20° to centre.
- Overall length 330mm (including fixing brackets)
- Case depth 38mm
- Spindle length 12.2mm