Defense / Maritime Valves
Stainless Steel Navy Vent Valves
Cast 316SS vent valves to NAVSEA 804-1749102/1749103 Rev C — airtight/watertight closures and fire dampers for HVAC, battery storage, and more.
NAVSEA 804-1749102 / 1749103
Fire-safe stainless vent valves for the most demanding shipboard air systems.
Lexair stainless steel Navy vent valves are manufactured to the NAVSEA standard 804-1749102/1749103 Rev C. They are offered in both round and oval style bodies and feature a working pressure of 15 PSI (45 PSI hydrostatically tested).
These Made in the USA products were designed for use as an airtight or watertight closure as well as fire dampers. They are compliant with several MIL Specs and are used on all Navy ship classes. Available in 2-1/2″ through 36″ round or 7×3″ through 30×20″ oval sizes — typically for HVAC, intake and exhaust air, lithium-ion battery storage venting, or any application where a firesafe damper is required.
Features & specs
316SS fire dampers with shock and vibration compliance.
Features
- Airtight and watertight closures as well as fire dampers
- MIL-S-901 shock test compliant
- MIL-STD-167-1 vibration test compliant
- Used on all Navy ship classes
- Lightweight relative to duty
- Made in the USA
Technical data
- Size range (round)
- 2-1/2″ – 36″
- Size range (oval)
- 7×3″ – 30×20″
- Body style
- Lug (Fig. 641 / 661)
- Pressure rating
- 15 PSI working / 45 PSI hydrostatic
- Standard
- NAVSEA 804-1749102/1749103 Rev C
Materials of construction
- Body
- Cast 316SS
- Disc
- Cast 316SS
- Stem (upper)
- Inconel
- Stem (lower)
- 17-4PH SS
- Seat
- Silicone / intumescent
- Packing
- Silicone / Graphoil
General applications
- HVAC applications
- Intake and exhaust air
- Lithium-ion battery storage
- Firesafe damper service
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