Ycxs Zdh-a-6 Polyurethane Elevator Buffer Non-Linear Energy Storage Buffer for Lift Car & Counterweight

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: The ZDH-A series includes models from ZDH-A-3 (80*100) up to ZDH-A-18 (250*200), covering allowable gross mass from 200 kg to 9,000 kg. The ZDH-A-6 model (100*100) is suitable for 500-3,000 kg applications.

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: Polyurethane buffers are smaller, lighter, and maintenance-free - they do not require oil changes or fluid level checks. They offer excellent recovery and aging resistance. Hydraulic buffers are typically used for higher speeds (>1.0 m/s). For low-speed elevators (less than 1.0 m/s), polyurethane buffers are the preferred choice for their simplicity and reliability.

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.