Conval Revenue and Competitors

In 1962, Mr. Chester Siver completed designs for a revolutionary line of high pressure forged steel valves. Hamilton Standard, division of United Technology, was asked to use their then new Electron Beam Welding technology for joining of parts into valves for subassemblies. Hamilton Standard became intrigued with the valve as an ideal application of the Electron Beam Welding technique and negotiated a contract for rights to manufacture and sell the valve and for Mr. Siver to serve as the manager of the valve project. The date was August 8, 1962. The first CLAMPSEAL® valves were marketed by Hamilton Standard in 1964. The growing demand for aerospace products forced Hamilton Standard into a decision to abandon its industrial products projects and CLAMPSEAL® valve production ceased in April of 1965. One year later under the terms of their contract all rights to the valve reverted to Mr. Siver.