A Breather Valve (Vacuum Type) is a type of safety valve that is used to protect storage tanks, vessels, pipelines, and other pressure vessels from vacuum conditions. The valve allows air to enter the vessel as necessary to maintain a safe pressure level and prevent damage or collapse of the vessel.

This type of breather valve typically has a spring-loaded diaphragm that opens and closes based on the pressure inside the vessel. If the pressure inside the vessel falls below a certain vacuum level, the diaphragm opens, allowing air to enter and preventing the vessel from collapsing.

Vacuum type breather valves are commonly used in a variety of industries, including oil and gas, petrochemical, chemical, and pharmaceuticals, where the storage of hazardous or flammable materials requires a high level of safety and protection against vacuum conditions.