The PresAir Trol air button switch in DPDT momentary format is built for compatible pneumatic control systems that require a brief double-pole switching response from a center-spout configuration. Momentary-action air switches are useful when the system should respond only during the actuation event and then return as designed.This replacement is especially useful when the original switch no longer returns cleanly, responds inconsistently, or has failed internally. Choosing the proper DPDT momentary format helps preserve the intended timing and logic of the original control design.It is a practical service part for applications that depend on quick-return pneumatic switching rather than maintained-state operation. PresAir Trol DPDT momentary air button switch Center spout configuration for compatible applications Helps restore quick-return pneumatic switching behavior Useful when the original switch is worn or unreliable Supports more accurate control-system restoration