For elevators with a speed of 101 to 150 FPM, what is the minimum stroke for spring buffers?

The minimum stroke for spring buffers in elevators with speeds ranging from 101 to 150 feet per minute is 2.5 inches. This specification ensures that the spring buffers have enough capability to absorb the impact of the elevator car during a potential emergency stop or if the elevator encounters an obstruction. The 2.5-inch stroke allows for sufficient compression to safely mitigate energy and reduce the risk of damage to both the elevator system and its passengers.

Spring buffers are crucial safety components that help enhance the effectiveness and reliability of elevator systems, especially at medium speeds. Adhering to this standard is essential for compliance with safety regulations and to ensure the operational integrity of the elevator equipment. Using a stroke that is shorter than the recommended 2.5 inches could compromise the buffer's failure to adequately absorb impact, leading to unsafe conditions.