Isovac Engineering, Radiflo , Leak Testing World leader in leak testing hermetic devices IsoVac Engineering Since 1969 our mission has been to provide excellence in leak testing... with products and services that go far beyond the state of the art. Isovac Leak Testing with Radiflo IsoVac Engineering, Inc., was founded in 1969, with the purchase of the Radiflo... Leak Testing Process, and worldwide Patents, from Bell & Howell. IsoVac personnel have been involved in the Radiflo process since its invention in 1955. IsoVac was founded...