DIVISION 1 - GENERAL REQUIREMENTS - IDEAS-EC

A. Ball check valves shall be furnished with ANSI class 125 standard faced and drilled flanges. Thevalves shall have cast iron body conforming to ASTM A 159-83, Class 35, and with a 150 psiworking pressure.B. Ball shall be sinking type with a specific gravity of 1.3, shall be hollow steel with a coating ofvulcanized nitril rubber.C. The valve shall be designed to keep the ball completely out of the flow stream when open.D. The ball shall be guided to its seat by smooth ribs cast integrally in the housing wall.E. The valve shall be capable of operation at a pressure drop not greater than 1.5 feet of water at a flowvelocity of 6 fps.F. Products manufactured by Flomatic, or other and which meet these specifications.2.05 BUTTERFLY CHECK VALVESA. Cast iron bodyB. Buna N sealC. 316 stainless steel stops, pin, spring and retainerD. Rated for 125 PSI working pressureE. Wafer type constructionF. End connections per Piping Specification Schedules in Section 150602.06 DUAL DISC CHECK VALVES (WATER APPLICATION)A. Ductile iron bodyB. Buna N sealing element molded to bodyC. Doors: ductile iron electrolysis nickel coatedD. 316 stainless steel hinge, shaft torsion springs and shaft stopE. Rated for 150 PSI working pressureF. Spring loaded normally closed designG. End connections per Piping Specification Schedules in Section 15060H. Products manufactured by Mission (Duo-Check II), Apco (Series 9000), or others, and which meetthese Specifications.15106 - 311/07 CHECK VALVES