The Department of Defense, through the Defense Logistics Agency (DLA) Aviation at Philadelphia, PA, is soliciting offers for the procurement of modulating valves, specifically under the NAICS code 336413, which pertains to Other Aircraft Parts and Auxiliary Equipment Manufacturing. The contract requires the delivery of three units within a timeframe of 477 days, and it emphasizes compliance with higher-level contract quality requirements, including ISO 9000 or equivalent standards. These valves are critical components for aircraft systems, ensuring proper air conditioning, heating, and pressurization. Interested vendors must submit their proposals electronically to Sabrina Fiocca at SABRINA.FIOCCA@DLA.MIL, adhering to the stipulations regarding authorized sources and distributor letters, with the solicitation being issued under Emergency Acquisition Flexibilities Authority.