A leak limiting device on a regulator is designed to do what?

A leak limiting device on a regulator serves the purpose of allowing a controlled amount of leakage if the diaphragm ruptures. This design is important for safety and functionality.

When a regulator's diaphragm fails, instead of completely shutting off the gas supply—potentially disrupting service or causing pressure build-up—the leak limiting device enables a measured release of gas. This balance minimizes the risk of an explosive atmosphere by preventing dangerous gas accumulation while still allowing for continued operation, albeit in a restricted manner.

This controlled leakage is essential in many applications where complete gas supply interruption might cause operational issues or safety concerns, thus facilitating a safer environment where potential gas leaks can be monitored and managed appropriately.