Kone Elevator Oil Hydraulic Buffer Obc16c Obc16b Obc18c Obc18b Obc20b Obc25c

A: It is a safety device installed in the elevator pit. When the elevator car or counterweight travels beyond its normal limit, the buffer absorbs the impact energy and brings the car to a controlled stop - protecting passengers and equipment. It is a non-linear energy-accumulating buffer suitable for rated speeds up to 1.0 m/s.

A: Oil hydraulic buffers are energy-dissipating type, suitable for higher speeds (above 1.0 m/s). They use hydraulic oil and throttling orifices to absorb impact energy. Polyurethane buffers are non-linear energy-accumulating type, typically used for lower speeds (less than 1.0 m/s). For KONE elevators with rated speeds above 1.0 m/s, oil hydraulic buffers are required.

A: Select based on three key factors: Rated speed: Must be less than 1.0 m/s for HC-A series Allowable gross mass: Choose the model whose range covers your elevator' s total load Mounting dimensions: Confirm the installation bolt pattern (standard 80*35*80*17 for most models)

A: Compatible with KONE elevator systems including MonoSpace, MiniSpace, and other models using the CYOB series oil buffer configuration. The CYOB-73A/210 is the direct OEM replacement for KONE part number KM51094715.

A: Replace if you notice: visible deformation, surface cracking, powdering, hydrolysis, or inability to recover after compression. Per T/CEA 0055-2024, the buffer should also be replaced if it fails the specified technical conditions during inspection. Regular visual inspection is recommended.