Original old equipment vintage catalog NEW YORK AIR VALVE CORPORATION of New York City, NY. Nyavco Orifice Control by Venting Valves. Hot water, steam heating. Vacu-Seal Ball Check, bellows Vacuum Gold-Seal Lock, Giant Three Speed Air Eliminator. Disbound from a large 1938 construction book, this unique one page technical data specification sheet would display wonderfully matted and framed. It would be a marvelous addition to your architecture and engineering library.
- SKU z317
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