all the dryer parts are in famous brand, such as Danfoss, Parker, Sporlan, and Alco. And all the refrigerant pressure controllers are from original factory products of Danfoss, (most of factories in the same trade are adopting the domestic brands). All the main dryer parts, like evaporator and by-pass valves also are in famous brand, such as Danfoss, Parker, Sporlan, and Alco.