Rack and pinion door closer with scissor action arms Features and advantages: One door closer size for a closing force range of 15 ‚¬â€œ 40 Nm = size 2 - 5 (to DIN EN 1154). Closing force adjustable from the side, no displacement of closer body. Easy fixing on timber, PVC, tubular frame aluminium or steel doors. Valve adjustment from the front:- control of closing speed- control of latching powerBoth functions as a standard. Plastic valves with optimum thermal characteristics provide consistent closing speed also with changes in temperature. Smartly shaped, compact aluminium casing. Application: The OTS 440 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. Technical description: For door leaf widths up to 1250 mm. Door opening angle 180°. Controlled closing from any opening angle. Protection against forced operation via security valve. Optional integrated hold open function adjustable for door opening angles from approx. 70° to 150°.