VALVE,STOP AND STOP

Quick Summary

The Department of the Navy, NAVSUP Weapon Systems Support (WSS) Mechanicsburg, is soliciting proposals for the procurement of Stop and Stop Check Valves for crucial shipboard systems. This is a Total Small Business Set-Aside opportunity for Level One Program material, designated as SPECIAL EMPHASIS due to the high risk of failure, injury, or loss if incorrect or defective. Proposals are due by April 30, 2026.

Scope of Work

This procurement is for 1/2 Inch IPS, Seawater Service, Socket Weld End Connections, Stop Check Valves. The valves must conform to NAVSEA Drawing 803-5959306 assembly 803-5959306-T-121 and associated Engineering Reports. The Government will supply NSN 1H9510-01-495-9543X2 for the manufacture of stems and discs, requiring manufacturers to maintain heat traceability throughout production.

Key Requirements

• Material Certification: Quantitative chemical and mechanical analysis is required for specific parts including the Bonnet, Union-Bonnet Ring, Stem, Disc, and Body-Stop Check Valve, using materials like ASTM-B381, ASTM-B150, SAE AMS 4931, and ASTM-B564.
• Testing: Required tests include Dye Penetrant Inspection, Ultrasonic Inspection, Pressure Tests, and Non-Destructive Tests for weld repair, performed according to specified standards (e.g., T9074-AS-GIB-010/271, MIL-STD-2035). First Article Testing (FAT) is required for one unit and for forgings (Body-Stop Check Valve and Bonnet).
• Quality System: Contractors must maintain a quality system in accordance with ISO-9001 (or MIL-I-45208) and calibration system requirements of ISO-10012 or ANSI-Z540.3 with ISO-17025 (or MIL-STD-45662). Government Quality Assurance (GQA) at source is required.
• Traceability: Critical for Level I/SUBSAFE systems, requiring material traceability to certification test reports via unique traceability numbers, heat-lot numbers, or heat-treat numbers marked on the material.
• Welding/Brazing: Must comply with S9074-AR-GIB-010A/278, 0900-LP-001-7000, or S9074-AQ-GIB-010/248. Procedures and qualification data must be submitted for approval. Repair welding is not permitted on titanium parts.
• Waivers/Deviations/ECPs: Detailed procedures are provided for submitting waivers, deviations (Critical, Major, Minor), and Engineering Change Proposals (Class I, Class II) for review and approval by the Contracting Officer.

Contract & Timeline

• Type: Solicitation
• Set-Aside: Total Small Business
• Response Due: April 30, 2026, 8:30 PM EDT
• Published Date: April 15, 2026
• Delivery: Partial and early delivery are authorized and desired. Final material delivery is 450 days after award. Certification data CDRLs are due 20 days prior to delivery.

Evaluation & Submission

• Evaluation: NAVSUP WSS will consider past performance in the evaluation of offers (Clause 252.204-7024).
• Drawings: Drawings can be accessed via sam.gov. The BIDSET contains NOFORN and confidential drawings; a DD254 will be completed prior to receiving confidential drawings.
• Certification Submission: Certification data must be submitted to Portsmouth Naval Shipyard for review and acceptance prior to each shipment via Wide Area Work Flow (WAWF), with email notification to PORT_PTNH_WAWF_Notification@navy.mil. No material is to be shipped prior to acceptance.

Important Notes

This is a rated order certified for national defense use, requiring compliance with the Defense Priorities and Allocations System Regulation (15 CFR 700). Thread lubricants containing molybdenum disulfide are prohibited; A-A-59004 must be used as a replacement.