Parker domnick hunter Starlette Plus Refrigerated Air Dryers actively remove this condensate to achieve near perfectly dry compressed air. Starlette Plus Refrigerated Air Dryers utilize advanced heat exchanger and demister separation technology and delivers uncompromising performance at the lowest cost of ownership. "Plug & Play" design for easy installation and operation (DRD10 - DRD125). Robust timed solenoid drain equals improved reliability (DRD15 - DRD250). Compact, space saving design. Ultra low pressure differential across the dryer (1.45 psi g average). Saves energy. All models incorporate a built-in dewpoint indicator.