3KH-V automatic air supply device I. Overview 3KH-V automatic air supply device is composed of a two-way electric valve and two manual ball valves, check valves and other components. It hydraulic device for hydropower or other energy storage devices for automatic qi, in order to maintain its internal gas-liquid ratio. Second, the technical parameters Rated pressure: 4.0MPa, 6.4MPa, 9.0MPa Medium: Air Working Pressure: 0.1MPa Diameter: 15mm, 25mm Ambient temperature: 0 ~ 40 ℃ Relative humidity: ≤95% RH operating time: 15S Operating Voltage : AC220V DC220V DC110V DC24V AC110V mounting direction: Any direction Weight: 15 ~ 48Kg Connection: welded joints, using standard JB6381.1-92