The right combination of technology and simplicity. The RST Shop Standard Series(5-50 CFM) are non-cycling refrigerated compressed air dryers with a static cooled condenser. ISO Air Quality 6. 48°F Pressure Dewpoint. NOTE: Standard Dryer ratings are established using the following operating conditions (as per ISO 7183, Table 2, Option A2): Inlet Compressed Air Temperature:100°F (38°C) / Inlet Compressed Air Pressure: 100 psig (7 Bar) Max. Ambient Air Temperature: 100°F (38°C) / Inlet Compressed Air Relative Humidity 100% (Saturated). Use Dryer Selection Tool to find the the optimal model for different operating conditions.