◇ Overview HDK-type flip-air solenoid valve specially designed for unattended operation or remote controlled automation systems demanding designed to control airflow off, so that the actuator action. Especially for hydro-generating unit stop process, receiving speed signal of the electrical signal and switch gas line, brake mechanism is operated so that the air can be reliably keep working. ◇ characteristics and principles of the valve consists of a two-way solenoid pilot valve, a two-position two-way solenoid pilot valve, a pressure-type main valve, its advanced design, reasonable structure, small size, low power consumption, reliable operation. ① job status from Hold: ON: When two two-way pilot valve is energized, the main valve in the piston effect; implement the pilot valve power emperor valve operating state self-holding. Close: When the two-way pilot valve is energized, the main valve in the differential pressure closed; implement the pilot valve power emperor valve reset state self-holding. ② original state memory function: When the power and air supply are gone, the main valve in the spring in the off original state. ◇ Technical parameters 1) Working pressure: 0.15 ~ 1MPa, 1 ~ 4MPa non-corrosive gases 2) Nominal Diameter: Φ10mm, Φ15mm 3) Working voltage: DC24V, DC110V, DC220V, AC220V ◇ Model Description HDK- □ - □ / □ S with SK signal contacts Operating Voltage (V) Working Pressure (MPa) Nominal Diameter Model Type L L1 H H1 × H2 HDK-10 100 32 130 60 × 60 HDK-15 110 38 150 72 × 66 HDK-20 120 46 150 78 × 66