VALVE, REGULATING, FLUID PRESSURE

A metal casting process is required to manufacture a 3-inch flanged fluid pressure regulating valve with an inlet pressure rating of 250 PSI and an outlet pressure range of 25 to 60 PSI, with tooling necessary for casting production. Seat rings must be fabricated from QQ-N-281 or ASTM A494 nickel copper alloy, and nickel aluminum bronze alloy C63260 is strictly prohibited. The elastomeric disc packing must be composed of BUNA-N per MIL-P-25732 or fluorocarbon rubber per MIL-R-83248 with a hardness of 70 to 80 Durometer A. The valve must conform to ASTM F1370 (R2011), Revision NR dated 02/03/1992, and is designated as a critical application item. Mercury or mercury-containing compounds are banned from direct contact or intentional addition, with exceptions only for functional uses in batteries, instruments, sensors, controls, weapon systems, or NAVSEA-specified reagents; portable mercury-containing devices must have shockproof construction and a secondary containment. Class I ozone-depleting chemicals are prohibited, and substitute chemicals require prior approval. The valve must comply with all technical and quality requirements referenced in the DLA Master List of Technical and Quality Requirements, including tailored higher-level quality provisions for both manufacturers and non-manufacturers. Sampling must follow MIL-STD-1916, ASQ H1331 Table 1, or an equivalent zero-based plan, with critical, major, and minor attributes assigned verification levels VII, IV, and II or AQLs of 0.1, 1.0, and 4.0 respectively; unspecified attributes are deemed major. Acceptance requires zero non-conformances in any sampled lot unless otherwise stated. The manufacturer’s inspection system must comply with SAE AS9003 or ISO 9001 tailored to SAE AS9003. Configurations must be managed under an Engineering Change Proposal process, and deviations or waivers require formal requests. Inspection and acceptance occur at origin, governed by FAR 52.246-2. Packaging must adhere to MIL-STD-2073-1E with specified methods, materials, and codes, including palletization per RP001 and marking per MIL-STD-129 with no special marking requirements. Any hazardous materials must be labeled in accordance with