In a modular equipment system using fluorescent postemulsifiable penetrant, where should the dryer be placed?

In a modular equipment system using fluorescent postemulsifiable penetrant, the correct placement of the dryer is after the developer tank. This placement is crucial because the developer needs to be applied to the surface of the part after the penetrant has been removed, and its purpose is to draw out the penetrant from any discontinuities effectively. Once the developer has been applied, it is necessary to dry the parts to ensure that the developer can perform its function correctly.

If the dryer is placed before the developer tank, it would not be effective, as the developer requires a moist environment from the penetrating fluid to work properly. Once the developer is applied and the system has thoroughly processed the part, drying the part afterward aids in enhancing the visibility of any indications before inspection. Placement after the developer tank ensures that the drying process occurs at the correct stage of operation, thereby optimizing the reliability of the inspection results.