Apollo service propulsion system rocket engine bipropellant valve improvement program Final report
Rocket engine bipropellant valve improvement for Apollo service propulsion system
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Test report: Evaluation of Du Pont LRU 488 as a seat seal material in the Marquardt R4D engine valve
Assessment of molded elastomeric Teflon as seat seal material for R4D engine valve
Lynch, R.↗
Space storable oxidizer valve
Design, fabrication, and testing of pneumatically operated liquid fluorine shutoff valve
Crosier, R. L.↗
Hemodynamic evaluation of rate augmentation produced by atrial pacing and isoproterenol in the early postoperative phase of cardiac valve surgery
Hemodynamic evaluation of heart rate augmentation produced by atrial pacing and isoprotenol in early postoperative phase of cardiac valve surgery
Armstrong, P. W.↗
Electrodynamic actuators for rocket engine valves
Actuators, employed in acoustic loudspeakers, operate liquid rocket engine valves by replacing light paper cones with flexible metal diaphragms. Comparative analysis indicates better response time than solenoid actuators, and improved service life and reliability.
Fiet, O.↗
Zero-leakage valves
Valve action confines polymeric material in a metal groove effecting seal by compressive reaction of the polymer. As cold flow does not occur, sealing material resiliency is preserved over numerous operations.
Salvinski, R. J.↗
Dynamic valve to supply constant total thrust to two orifice jets
Valve, maintaining constant total flow, is driven mechanically in periodic alterations to yield correspondingly periodic outputs of constant sum. Design is applicable to development of jet flaps for helicopter use and may be useful in a multinozzle system.
Egli, W. H.↗
Micro regulating ball valve
Ball valve of simple, rugged configuration overcomes leakage because there are no critical wear areas. Design has stable and precise calibration. Device can be assembled or disassembled in seconds and needs no lubrication.
Hawkins, J. W.↗
Combination pressure regulator and safety valve: A Concept
Device for regulating high pressure liquefied gas to high pressure vapor generator using liquid oxygen is described. System includes pressure regulation and safety valve features. Construction of the equipment and method of operation are presented.
Acres, R. L.↗
High-volume pressure relief valve
Valves with counterweights to assist in opening and closing are described, which can release large volumes of gas almost instantaneously, and provide airtight seals.
Dillard, W. H.↗
The design and development of a miniature bi-stable latching solenoid valve for low thrust resistojets
The design approach and development demonstration are presented for a flightweight, miniature, magnetic latching shutoff valve, suitable for use with the ruggedized H2 and NH3 resistojet and the biowaste resistojet. The design criteria established provided for compatibility with specified ruggedized resistojet propellants as well as the biowaste and other propulsion system propellants.
Lynch, R. A.↗
Poppet valve tester
Tester investigates fundamental factors affecting cyclic life and sealing performance of valve seats and poppets. Tester provides for varying impact loading of poppet against seat and rate of cycling, and controls amount and type of relative motion between sealing faces of seat and poppet. Relative motion between seat and poppet can be varied in three modes.
Tellier, G. F.↗
Valve, normally open, titanium: Pyronetics Model 1425
An operating test series was applied to two explosive actuated, normally open, titanium valves. There were no failures. Tests included: proof pressure and external leakage test, gross leak test, post actuation leakage test, and burst pressure test.
Avalos, E.↗
The liquid crystal light valve, an optical-to-optical interface device
A photoactivated liquid crystal light valve is described as an optical-to-optical interface device (OTTO) which is designed to transfer an optical image from a noncoherent light beam to a spatially coherent beam of light, in real time. Schematics of OTTO in use, the liquid cyrstal cell, and the liquid crystal structure are presented. Sensitivity characteristics and the principles of operation are discussed.
Jacobson, A. D.↗
Operating Room Environment Control. Part A: a Valve Cannister System for Anesthetic Gas Adsorption. Part B: a State-of-the-art Survey of Laminar Flow Operating Rooms. Part C: Three Laminar Flow Experiments
An anesthetic gas flow pop-off valve canister is described that is airtight and permits the patient to breath freely. Once its release mechanism is activated, the exhaust gases are collected at a hose adapter and passed through activated coal for adsorption. A survey of laminar air flow clean rooms is presented and the installation of laminar cross flow air systems in operating rooms is recommended. Laminar flow ventilation experiments determine drying period evaporation rates for chicken intestines, sponges, and sections of pig stomach.
Meyer, J. S.↗
Bypass control valve seal and bearing life cycle test report
The operating characteristics of a bypass control valve seal and bearing life cycle tests are reported. Data from the initial assembly, leak, torque, and deflection tests are included along with the cycle life test results and conclusions. The equipment involved was to be used in the nuclear engine for the rocket vehicles program.
Lundback, A. V.↗
Valve degradation detector
To determine corrosive degradation of valve while it is in service, detect changes in surface roughness or presence of corrosive layers at junction of poppet and seat by measuring temperature gradients created across junction by small heat source.
Doshi, N. H.↗
Control valve: Hot gas fast response
The design of a warm gas control valve is reviewed outlining the problems posed by the requirement for extremely fast response combined with a severe environment and a hot, dirty, and corrosive operating fluid.
Hollis, J. T.↗