AWWA C504 PDF
UWP Model , Ductile Iron Butterfly Valve – Conforms to AWWA C – DI Bodies translate into pure strength achieving three times that of Cast Iron alone. AWWA C Rubber-Seated Butterfly Valves. Document Language: English; Published By: American Water Works Association (AWWA); Page Count: The butterfly valves shall conform to the latest edition of AWWA-C Standard for Rubber Seated Flanged AWWA Butterfly Valves. The valves and actuators.
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Major changes included the addition of certain sprayed-metal seat surfaces and nonmetallic cylinder components as acceptable materials. On valves larger than 36 in.
The action becomes effective on the first day of the month following the month of Journal AWWA publication of the official notice. This standard also accepts sprayed mating-seat surfaces when the surfaces are applied under certain conditions.
Sleeve and other bearings fitted into the valve body or actuator gear case shall be of self-lubricated materials that do not have a harmful effect on water or rubber and do not have a coefficient of friction in excess of 0. Thus, users of this standard should consult the appropriate state or local agency having jurisdiction in order to 1.
Uncoated steel and iron-machined surfaces shall be coated with a corrosion inhibitor. Nuts, screws, and hardware used with clamps and retaining rings shall be of stainless steel or nickel-copper alloy.
ABAW-AWWA C504 and C517
Laverick, Underwriters Laboratories Inc. Under the hydrostatic test, the manufacturer may make special provisions to prevent leakage past the seats, and no part of the valve or disc shall have permanent visible deformation resulting from this test. Full-face flange protectors of waterproof plywood or weather-resistant pressboard, of at least the outside diameter of the flange, shall be fastened to each flange to protect both the flange and the valve interior. Other advisory information is provided below.
Typically high velocities can result from line breaks, during fire fighting or in surge relief applications. A structural, raised-area boss member cast integrally on the valve body and used to support the valve-shaft bearing and valve shaft.
Ductile Iron AWWA Butterfly Valve
Valves, hydrants and pipeline accessories for Awwx Works and Fire Protection. Sprayed mating-seat surfaces are acceptable only when applied by the plasma nontransferred arc, or sprayed-and-fused process.
ISO Mounting C04 6. Valves larger than 36 in. To demonstrate that the valve and actuator are workable, valves having direct-mounted actuators, except those provided with extension shafts of more than 36 in. The actuator is essentially an integral part of a butterfly valve. Model Data Sheet.
Val-Matic Valve & Manufacturing Corporation
Impregnation of mating-seat surfaces is not permitted. This removes most of the static load and allows identification of piping fit problems during installation and easier removal of the valve awwz maintenance. If materials included in the standard are not suitable for exposure to line content or are otherwise unacceptable, specify materials that are suitable and acceptable.
The material references for metals in Sec. The design awww the seat shall provide tight shutoff with flow in either direction, according to the tests required by Sec.
AWWA Specification – Stealth Valve & Controls Ltd.
Additionally, the seat, seat hardware, bearings, body gaskets, and shaft seals shall be replaced. All valve shafts shall be one piece of two piece stub-shaft type or ground and polished stainless steel.
Defense Supply Center Columbus, P. Interior c50 exterior surfaces, except finished or bearing surfaces, shall be carefully prepared by removing dirt, grease, and rust and shall be cleaned to the extent that the coating will bond to surfaces.
The upper surface of the valve disc shall be visible and shall be covered with a pool of water at 0 psig 0 kPa pressure. Valve shafts shall be wrought stainless steel or nickel-copper alloy. The person, company, or organization that purchases any materials or work to be performed. The test shall be conducted with the disc in the horizontal plane. If the valve-shaft diameter is reduced to fit connections to the valve operating mechanism, the smaller portion shall have fillets with radii equal to the offset to minimize the possibility of stress concentration at the junction awwz the two different shaft diameters.
The existence of an American National Standard does not in any respect preclude anyone, whether that person has approved the standard or not, from manufacturing, marketing, purchasing, or using products, processes, or procedures not conforming to the standard.
ANSI procedures require that action be taken to reaffirm, revise, or withdraw this standard no later than five years from the date of publication.