UMAC has served the natural gas industry since 1970. In 1974, UMAC became the premier manufacturer of Excess Flow Valves used on gas service lines to protect homes and businesses.

Since their introduction millions of UMAC EFVs have been sold (More than 5 times as many valves as all US competitors combined) and installed worldwide, providing tens of billions of field service hours. Today the UMAC Excess Flow Valve is known as "The EFV of Choice."

UMAC manufactures a wide variety of EFVs that can accomodate service line capacities for both residential and commercial applications. The companies highly trained technical and production staff is experienced in all areas of EFV research, development, engineering and quality control.

Whether you need standard valve or custom valve dsigns to meet specific applications, UMAC stands ready to serve...naturally.