This document describes a unit for testing the continuous operation of CNG regulators by conducting 50,000 pressurizing and depressurizing cycles at different test pressures and temperatures according to ISO 15500-9:2001(E) standards. The unit features user-friendly software for scheduling tests, PLC logic control, a high-pressure reservoir up to 300 bar, safety interlocks, mobility, ergonomic controls, and the ability to test multiple points for OEMs. It can test inlet air pressures from 10-260 bar at room temperature.