HVA is the premier manufacturer and supplier of high and ultra high vacuum valves to the world's leading vacuum technology in ... novators. Our world class manufacturing facility in Nevada, USA supports our global sales and service network for the semiconductor, solar, scientific research, BioPharm, vacuum coating, and LED industries High Quality Precision Stainless Steel and Aluminum Vacuum Valves/Components Gate Valves Rectangular Valves MESC Angle Valves Custom Vacuum Components Low Particulate Valves Large Rectangular Valves Solar/FPD Throttle/Isolation Valves Flanges and Fittings Harsh Process Valves Door Valves 3-Position Valves Integrated Solutions read more