The MAC 35 series pushbutton valve is a manually operated a 3-way poppet valve. It features a manual operator, a balanced poppet and powerful return spring. These features translate into high shifting forces, fast consistent response times, and long life. Their unique balanced design means versatility in piping - the valve can be configured as a 3-way or 2-way - normally closed or normally open or can be used for vacuum, diverter or selector applications.