Within the ASCO portfolio are valves suitable for use on Vacuum. This covers a large range of pipe sizes as well as different materials of construction; Brass, Aluminium & Stainless Steel are all available. These vacuum solenoid valves come in 3 different types depending on absolute vacuum range: Low vacuum, medium vacuum (With suffix VM) & high vacuum range (Using suffix VH). Asco Solenoid Valves Vacuum Series Valves include 262, 215, 030, 210, 287 & 387.