Various embodiments of methods and devices for coating stents are described herein.

Cryogenic solenoid valves are disclosed. A solenoid valve assembly includes a valve body that includes a valve seat. The solenoid valve assembly includes a cartridge mounted to the valve body, a plunger slidably received by the cartridge, and a seat disc holder slidably received by the cartridge. The solenoid valve assembly includes a retainer attached to the seat disc holder such that the retainer and the seat disc holder form a plunger head receiving cavity that houses a head of the plunger. The solenoid valve assembly includes a seat disc attached to the seat disc holder. The solenoid valve assembly includes an electromagnetic coil energizable to cause the solenoid valve assembly to move from a closed configuration in which the seat disc sealingly engages the valve seat and an open configuration in which the seat disc is disengaged from the valve seat.

A cryogenic cylinder control system for regulating fluid within a cryogenic cylinder is disclosed. The system includes a pressure relief and vent module fluidly connectable to a head space above liquid within the cryogenic cylinder, a manual valve module fluidly connectable to the liquid within the cryogenic cylinder and to an external device, a solenoid valve module fluidly connectable to the manual valve module and to the head space within the cryogenic cylinder, a build-up coil fluidly connectable to the manual valve module and to the solenoid valve module, and a controller operatively connected to the solenoid valve module to control fluid flow through the solenoid valve module.