Series VT 3port, direct operated poppet valves are compact in size, yet provide large flow capacity, and low power consumption.  The series is suitable for use in vacuum applications.  The VT valve is a single valve with 6 functions (universal porting type) such as N.C. valve, N.O. valve, divider valve, selector valve, etc.  The manifold style valve, series VO, can be easily converted from N.C. (normally closed) to N.O. (normally open) by merely turning over the switch cover.