1 8 36” x 36” Square Butterfly Valves with electric actuators and accessories as noted and specified in the specifications Lead Time: _________________________ $ $ 2 8 36” x 36” Square Butterfly Valve Gaskets as noted and specified in the specifications $_________________________ $ A. Manufacturers: 1. Pratt, Waterman, or equal B. General: 1. Valves shall be bubble tight with flow in either direction. 2. Valve design shall be suitable for an operating differential pressure of 10 psig maximum. 3. The valve shall be capable of operation after long periods of inactivity. 4. The valve discs shall rotate 90 degrees from the fully open position to the tight shut position. 5. When subjected to the maximum design head, a stress safety factor of 3.0 on the yield point or 5.0 on ultimate strength, whichever is the lower, shall not be exceeded. 6. Maximum deflection of the valve structural design limit shall be 1/16".
