HVA is a manufacturer of stainless steel vacuum valves, fittings and components for the semiconductor and scientific industries. Operational for more than 30 years, the company has a more than 50,000- square-foot manufacturing facility. Additionally, it provides packaging and assembly services. HVA operates in the United States, the United Kingdom, Sweden, Finland, Germany, France, Japan, Korea, Singapore and China. HVA maintains one of its locations in Reno, Nev. The company provides cycle, flow, rectangular slit, shielded, throttle and pendulum gate valves.