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Hydraulic industrial machine - GettyImages-2279485617  
Credit: Daria Matveeva 
Creative #:	2279485617 
License type:	Royalty-free 

Collection:	iStock / Getty Images Plus 

Max file size:	6766 x 4510 px (22.55 x 15.03 in) - 300 dpi - 8 MB 
Upload date: 	June 05, 2026 
Location:	United States 
Release info:	No release required 

Categories:	Stock Photos Agricultural Machinery 
ALT: Part of a hydraulic industrial machine, control levers of a hydraulic machine, industrial High pressure hydraulic hose system connected to steel pipes, close-up. Marine hydraulics.
Low-Cost, Long-Lasting Valve Seal
NASA's technique simplifies the seat installation process by requiring less installation equipment, eliminating the need for unnecessary apparatus such as fasteners and retainers. Multiple seals can be installed simultaneously, saving both time and money. NASA has tested the long-term performance of a solenoid actuated valve with a seat that was fitted using the new installation technique. The valve was fabricated and tested to determine high-cycle and internal leakage performance for an inductive pulsed plasma thruster (IPPT) application for in-space propulsion. The valve demonstrated the capability to throttle the gas flow rate while maintaining low leakage rates of less than 10<sup>-3</sup> standard cubic centimeters per second (sccss) of helium (He) at the beginning of the valves lifetime. The IPPT solenoid actuated valve test successfully reached 1 million cycles with desirable leakage performance, which is beyond traditional solenoid valve applications requirements. Future design iterations can further enhance the valve's life span and performance. The seat seal installation method is most applicable to small valve instruments that have a small orifice of 0.5 inches or less.
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