Valve consists of small geared reversible motor, operated by momentary contact closure, which drives shaft with O-rings placed to seal selected ports. Shaft rotates and also moves axially, causing ports to be alternately connected and disconnected. Electrical control of valve is provided by limit switches and relays. Design has advantage over other available valves: less precision machining of parts is required; machining operations are less expensive. Seals are made with O-rings, which are easily replaceable and inexpensive; valve uses less power. It can be used in any application requiring pilot valves for control devices.
Miniature motor-driven instrument valve
NASA Tech Briefs ; 4 , 4
1980-06-01
Miscellaneous
No indication
English
MOTOR-DRIVEN VALVE CONTROL DEVICE AND MOTOR-DRIVEN VALVE DEVICE INCLUDING THE SAME
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