Varian’s aluminum block valves are the valves of choice for medium- and high-vacuum requirements. These low-cost, compact, and reliable valves are used for applications in semiconductor manufacturing, R&D, and industrial vacuum systems. Varian’s block valves will reliably achieve 300,000 cycles or more in most applications. This block valve has KF25 size flanges and has wiring for 115 VAC. Varian Part Number L9942302.