Externally Heated Desiccant Dryer The DHP Series of blower purge desiccant air dryers ensures that your dry air requirements are met. The DHP can provide you with ISO 8573.1 Class 2 dewpoints. Couple your DHP dryer with the appropriate FIL filtration to achieve up to ISO 8573.1 Class 1 for solids and oils. 300-3200 scfm Max Operating Pressure: 150 psig Max Inlet Temperature: 120°F Nema 4 construction Low-watt density heater saves energy and prevents premature desiccant aging Reduce purge costs with the optional EMS Controlled Free-Air Supercharger Soft-seated check valves for tight shutoff and durability