What triggers the opening of the relief valve in a PT/T motor?

The opening of the relief valve in a PT/T motor is primarily triggered when the PT/T reaches its travel limit. When a motor operates and reaches the end of its designated range of motion, the relief valve activates to prevent damage. This mechanism is crucial for protecting both the motor and the connected components from stress and potential failure that could occur if the actuator continues to try and move beyond its limits.

By allowing excess pressure to escape when the travel limit is reached, the system ensures operational safety and longevity. It's important to control the movement effectively to maintain the integrity of the motor's functionality, and this safety feature is a key design aspect in hydraulic and pneumatic systems.