Focus on the pronunciation of safety valve
English definition of “safety valve”
› PRODUCTION a part of a machine that opens to release pressure if it becomes too high: The process involves shutting safety valves beneath the water's surface to prevent oil and gas releases.
› something in a system or situation that helps when problems become too great: Experts say there must be a safety valve built into the system to relieve the stress caused by an economic slowdown. There's no safety valve, like higher air fare prices, to offset higher oil prices.