A new series XM and XY range of lightweight, precision cast, stainless steel high vacuum valves, from SMC Pneumatics (UK), have been developed to reduce the effects of corrosion by the use of SCS13 body material. Currently available in two models, XM angle type and XY inline type, its high quality precision casting prevents the build up of gases. Following extensive development testing, the service life of these single and double acting valves is estimated to be in excess of 2 million cycles when operated using inactive gas under vacuum within temperature ranges from 5 to 150C. Available in flange sizes between 16 and 80mm dependant on model type, these stainless steel high vacuum valves really are outstanding performers.