The Department of Defense, specifically the Department of the Navy through NAVSUP Weapon Systems Support, is soliciting proposals for the procurement of air modulation valves, classified under the NAICS code 336413. This request for quotation (RFQ) pertains to a spares buy, indicating the need for replacement parts essential for aircraft air conditioning, heating, and pressurizing systems, which are critical for maintaining operational readiness. Interested vendors should note that the Small Business Administration has determined that a set-aside for small businesses is not applicable for this procurement. For further inquiries, potential bidders can contact Gina P. Sassane at 215-697-2198 or via email at gina.p.sassane.civ@us.navy.mil.