The Dormakaba TS68 hydraulic door closer operates on a calibrated hydraulic damping system, meticulously designed for controlled kinetic energy dissipation. At its core, the mechanism utilizes a piston compressing hydraulic fluid to regulate the door's closing motion. Two distinct, adjustable valves govern this process: one for the primary closing sweep (from the maximum open position down to approximately 15°) and another for the critical latching phase (the final 15° of travel). This independent control ensures precise deceleration throughout the closing arc, preventing uncontrolled slamming, while providing sufficient force for positive latch engagement without undue impact.
Compliance with BS EN1154 is a fundamental aspect of the TS68's engineering. This standard specifies performance requirements for controlled door closing devices, ensuring safety, durability, and reliability. The TS68 meets these benchmarks by consistently delivering specified closing forces across its adjustable EN2-4 power range and maintaining stable operation over extended periods, despite a specific cycle test rating not being provided. The adjustable power size facilitates optimal force-to-mass matching for doors up to 1100mm width, contributing directly to door longevity and user safety.
Crucially, for applications where fire safety is paramount, it must be noted that the Dormakaba TS68 is *not* fire-rated. This specification dictates its unsuitability for installation on fire doors requiring certified fire resistance. Furthermore, the design of the TS68 intentionally omits back check and delayed action functions, positioning it as a streamlined solution focused on core, reliable closing functions for standard doors. The integrated hold-open feature, however, is a hydraulic bypass mechanism that temporarily locks the door in an open position, providing functional flexibility while maintaining the unit's overall hydraulic integrity. Its robust metal construction and a net weight of 1.4 kg underscore a design philosophy prioritizing practical durability for its intended applications.
