Curtis E71 10HT12 Air Compressor Pressure Switch

The Curtis E71 10HT12 pressure switch is a 135–175 psi auto-control switch designed for Curtis two‑stage air compressors that use the E71 pump. It functions as the tank‑pressure sensor that starts the compressor at 135 psi and stops it at 175 psi, helping maintain a steady output while guarding against over‑pressurization. The unit is identified by the 9013fhg code in model listings, and it is commonly used on Curtis CA‑series systems built around the E71 two‑stage cast‑iron pump, including 10 hp configurations such as CA10. In these installations, the switch governs motor cycling to match demand, enabling reliable operation in shop environments where maintaining pressure in the 135–175 psi window is essential. This pressure switch is a component within Curtis’ piston‑compressor ecosystem, designed to integrate with E71‑based pumps and their typical control and plumbing arrangements for industrial and commercial applications.