Profile: GNB Corporation designs and manufactures reliable vacuum products. Our products include vacuum valves, chambers, gate valves, accessory components, pendulum valves and high vacuum gate valves. We offer our products for the worldwide scientific and industrial vacuum markets. We supply mid to large standard and custom valves in the industry. Our valves are manufactured in stainless and mild steel. These are available in sizes from 4 inches (100 mm) to 72 inches. We supply vacuum chambers with reliable vacuum integrity and strength. We are capable of building vacuum chambers of any complexity. We are experienced in design applications ranging from the R&D phase into high production. Our vacuum chambers are fabricated from stainless steel or mild steel. We also offer various options that include water cooling channels, double wall cooling, custom ports, single or multiple door access, carts, stands and custom interior & exterior finishes.