1965-02-01

Grade A Hermetically Sealed Hydraulic Servo System 650337

The paper discusses the techniques which successfully achieved Grade A hermetic sealing of a complete hydraulic servo system. Design concepts are set forth; actual hardware is illustrated; and supporting data are noted. The system that was sealed included the motor pump, servo valves, relief valve, dump valve, the hydraulic side of the actuator, the filter, and all O-rings. All these components were immersed in the oil reservoir and then sealed from the atmosphere by Grade A hermetic seals.

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