Linear drive door closer with slide rail Features and advantages: One door closer size for a closing force range of 9 ‚¬â€œ 26 Nm = size 1 ‚¬â€œ 4 (to DIN EN 1154). Identical borehole pattern across the OTS range. Easy fixing on timber, PVC, tubular frame aluminium or steel doors by using the mounting plate with mulit-fixing positions. Colour coded adjustment valves:Closing speed ‚¬â€œ red valveLatching force ‚¬â€œ yellow valveBoth functions as a standard. The valves are adjusted from the front. Plastic valves with optimum thermal characteristics provide consistent closing speed also with changes in temperature. Easy mounting of slide rail in mounting bar. Little friction of slide arm in slide rail due to a roller. Application: The OTS 630 type is suitable for side hung timber, PVC, tubular frame steel or aluminium doors. Left or right hand use. Standard mounting on hinge side, transom mounting opposite to hinge side - also vice versa. Technical description: For door leaf widths up to 1100 mm. Door opening angle 180°. Controlled closing from any opening angle. Protection against forced operation via security valve. Smartly shaped cover in a choice of colours. With new, self-centering snap fastener to fix the cover. Needle bearing axle.