Pneumatic piston air compressors are designed for longevity and low oil carryover, ideal for industries that operate in harsh environments. Available in simplex and duplex configurations, pneumatic air systems serve as low duty cycle and dependable compressors for controlling dampeners. Pneumatic Piston Air Compressors are commonly used by HVAC systems to control thermostat dampeners present in deducting systems. The air pressure variation in the thermostat helps open and close the ducts. To control these dampeners, an air compressor is needed. While the pneumatic air systems’ simplex module is ideal for low duty applications, the duplex configuration is best suited for instrumentation systems that need a standby, alternate compressor for overload capacity.