Abstract: A solenoid valve including a non-sliding plunger assembly. The solenoid valve disclosed herein generally includes a plunger assembly that is moveably suspended within an internal chamber of a housing of the solenoid valve away from any sliding contact with adjacent surfaces. The plunger assembly may not be in sliding contact with any of the adjacent surfaces, and thus a radial gap may be defined between the plunger assembly and all non-moving, non-flexing features and surfaces of the solenoid valve. The solenoid valve may include a flexural washer that is resiliently flexible and is configured to enable selective axial movement of the plunger assembly in response to energizing the solenoid coil. In various embodiments, the flexural washer is configured to moveably suspend the plunger assembly within the internal chamber away from any sliding contact with adjacent surfaces.

Abstract: A manual override mechanism for use in a vacuum toilet system may comprise: a shaft extending from a knob; a traveler configured to engage the shaft, the traveler comprising a first gear; a motor rack comprising a second gear configured to engage the first gear; and a flush gate extending from the motor rack, the flush gate configured to transition from a closed position to an open position in response to rotation of the shaft.

Abstract: A thermostat mixing valve for a water temperature control system may comprise a mixing chamber defining a valve outlet, a first proportional solenoid valve fluidly coupled to the mixing chamber, and a second proportional solenoid valve fluidly coupled to the mixing chamber. Each of the first proportional solenoid valve and the second proportional solenoid valve may include a housing assembly defining a fluid inlet and a fluid outlet, a plunger assembly configured to translate relative to the housing assembly, and a coil assembly configured to generate a magnetic field that translates the plunger assembly.

Abstract: A solenoid valve including a non-sliding plunger assembly. The solenoid valve disclosed herein generally includes a plunger assembly that is moveably suspended within an internal chamber of a housing of the solenoid valve away from any sliding contact with adjacent surfaces. The plunger assembly may not be in sliding contact with any of the adjacent surfaces, and thus a radial gap may be defined between the plunger assembly and all non-moving, non-flexing features and surfaces of the solenoid valve. The solenoid valve may include a flexural washer that is resiliently flexible and is configured to enable selective axial movement of the plunger assembly in response to energizing the solenoid coil. In various embodiments, the flexural washer is configured to moveably suspend the plunger assembly within the internal chamber away from any sliding contact with adjacent surfaces.