Elevator PU Buffer | OH-J21 Lift Buffer

Elevator PU Buffer | OH-J21 Buffer

OH-J21 Elevator Polyurethane Buffer is an energy-accumulation safety component designed for low-speed elevators and counterweight systems. Unlike hydraulic buffers that use oil, polyurethane (PU) buffers rely on the micro-cellular structure of high-grade elastomers to absorb and dissipate impact energy.

This model is a cost-effective, maintenance-free solution for residential and commercial lifts where the rated speed is typically 1m/s.

Technical Specifications (OH-J21)

Key Advantages of the OH-J11 Buffer

1. High Impact Resilience

The OH-J21 is manufactured using a specialized foaming process that creates millions of tiny air pockets. Upon impact, these cells compress to absorb the kinetic energy of the elevator car, providing a reliable safety stop.

2. Corrosion and Oil Resistance

Because elevator pits are often damp or contain spilled grease, the OH-J21 is engineered to be resistant to:

• Hydraulic Oils & Lubricants: Will not degrade if exposed to machine oils.

• Aging & Hydrolysis: Enhanced resistance to moisture-related breakdown.

• Chemical Exposure: Durable against common cleaning agents used in building maintenance.

3. Maintenance-Free Design

Unlike hydraulic buffers, the OH-J21 has:

• No Oil to Leak: Eliminates the need for sight glasses or fluid refills.

• No Mechanical Parts: No springs or pistons that can rust or seize.

• Easy Installation: Typically mounted via a single central bolt or a steel base plate directly to the pit floor.