The vacuum check valve seals and holds the vacuum for safe, energy efficient operation and is suitable for clamping, taking and vacuuming container applications. The Vaccon vacuum check valve is designed for vacuum applications. They provide high flow rates with small flow limits and have low opening pressures of less than 1 "Hg [33.86 mbar]. Large unrestricted flow path ensures high flow at low vacuum level. The low opening pressure allows the vacuum system to reach its large vacuum level before the check valve seal system. Vaccon Vacuum Check valves are made of durable aluminium oxide with a flexible internal valve seal mechanism.