These Brand New MKS Instruments KF16 Bellows Angle SERIES 150 Valves are designed to insure product quality, reliability and value. These function reliably in applications ranging from semiconductor manufacturing to plasma physics research to nuclear accelerators. These angle valves are primarily for vacuum processes. Sometimes the valves encounter pressures above atmospheric in gas handling, or in backfilled systems. These MKS Instruments valves may be used over the pressure range from atmosphere to below 10-9 Torr. The bellows design and closing force provide reliable operation to the maximum pressures stated.