A high-temperature pulsed solenoid valve for supersonic jet introduction up to 550 °C

A pulsed solenoid valve which can operate up to 550 °C has been designed for supersonic jet introduction. This valve uses a novel design where the nozzle head, which serves as the hot oven, and the solenoid operator are separated and the latter is maintained at a relatively low temperature using water cooling. A long steel plunger forms a metal-to-metal seal at the orifice which is broken when the magnetic field generated by the solenoid pulls back the plunger. Thus, although the oven operates at the high temperatures required for nonvolatile materials, the solenoid operator and electrical parts remain relatively cool.