Fire-safe Vent Valves

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Model: Figures 641 and 661

Features:

  • Valves designed for airtight and watertight closures as well as fire dampers.
  • The 641/661 valves are built to BUSHIP Drawing #804-1749102/1749103 Rev. C.
  • 316 stainless steel body and disc, Inconel® upper stem, 17-4 lower stem, silicone/intumescent seat.

Size Range: 641: 21/2″ to 30″; R 2.5 – R36
661: 7″ x 3″ to 30″ x 20″; K31 – K41
Pressure Rating: 15 psi working, 30 psi test

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610.647.3810