This is a small-business set-aside procurement for a Government valve guide for a valve assembly per Dresser-Rand Drawings 5100493 and PL5100493, Item 7 (P/N 365203), for use in a critical shipboard system. The material is designated SPECIAL EMPHASIS/Level I and requires stringent quality assurance, traceability, inspection, welding qualification, certification, and an ISO-9001-based quality system, with Government quality assurance at source. Offerors that are not the OEM must identify the OEM by company name and CAGE and provide a signed OEM distributor letter of authorization; packaging at a different location must also be identified. A valid U.S. security clearance at the DD254 level or higher is required because the requirement includes a classified annex, and the resulting order will be DPAS-rated. The warranty is one year from delivery, and the Government may add quantity via option within 180 days after award, up to the cited percentage.