What is the maximum tripping speed of an over speed valve?

The maximum tripping speed of an overspeed valve is set at no more than 140 percent. This is a crucial safety measure in elevators to prevent dangerous conditions when the elevator travels faster than normal operations due to mechanical failure or other issues. The design of the overspeed valve is intended to activate and bring the elevator to a safe stop when the speed exceeds this threshold.

Operating within these specifications ensures that there is a reliable safety mechanism in place to protect passengers and the equipment. It is essential for ensuring compliance with local regulations and industry standards that govern the operation of elevators, which aim to maximize safety and prevent accidents. Hence, 140 percent is established as the standard for effective and safe operational limits.