Compatible with all ISO 5599/1 Size-1 directional control valves, Vac-Stac™ Series foster accelerated incorporation of vacuum with individual ISO valve bases or manifold assemblies for automation applications. Modular products, which add <2 in. to valve stack height and can be retrofitted into existing equipment and systems, offer means to control air and vacuum in one unit. There are 11 performance levels available up to 28 in. Hg vacuum level and 3.2 scfm vacuum flow.