Pneumatic foot pedal valve are used to signal other pneumatic devices within a system remotely. For example, a foot pedal valve can operate pneumatic cylinders that hold workpieces in place enabling hands-free machine operation. Latching foot pedal valve locks workpieces in place. Upon removal of a foot, a detent overrides and holds the pedal lever down. The reinsertion of a foot releases the detent. Spring return versions of foot pedal valve are used to perform repetitive functions like dosing, pressing, punching or drilling. On the removal of a foot from the foot pedal valve, the foot pedal valve overrides.