48--VALVE,GATE

The valve is a gate valve with a 0.250 inch nominal size, constructed of bronze and rated for a maximum pressure of 400 PSI and a maximum temperature of 250 degrees Fahrenheit. It is equipped with a nitrile seal as standard, suitable for steam, water, air, and oil service up to 250 degrees Fahrenheit. Each valve must be supplied with an attached bag containing an EPR seal, which must be used by the customer for applications exceeding 250 degrees Fahrenheit in steam or water (up to 400 degrees) or in air (up to 300 degrees), but EPR seals must not be used in any oil service. The valve is identified by NSN 4820-01-539-0925 and must undergo shock and vibration testing per specified military standards, including shock test classifications for lightweight equipment on surface ships and submarines, and must meet MIL-STD-167 Type I vibration requirements. A signed hydrostatic test report certifying compliance with the drawing specifications must be enclosed with each unit. The contract prohibits the intentional use or direct contact of mercury or mercury-containing compounds in any supplied hardware, with limited exceptions for functional uses in batteries, instruments, sensors, weapon systems, or NAVSEA-specified reagents; portable devices containing mercury must be shock-proof and have a secondary containment barrier per NAVSEA 5100-003D. Class I ozone-depleting chemicals are strictly banned. The item is designated as a Critical Application Item and must comply with detailed packaging requirements per MIL-STD-2073-1E and MIL-STD-129, including specific methods for wrapping, cushioning, and marking. The unit of issue is each, with a quantity of 106 units to be delivered FOB origin within 332 days, with no tolerance variance. Delivery is required to DLA San Joaquin in Tracy, California, with a need ship date of June 22, 2027. All quality and technical requirements are governed by the DLA Master List of Technical and Quality Requirements, and configuration changes require formal engineering change proposals.