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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Free standing torque tubes. Unload valves carefully to the ground without dropping. An American National Standard is c5504 as a guide to aid the manufacturer, the consumer, and the general public.
Ductile Iron AWWA Butterfly Valve
Model Maintenance and Operation Manual. The major revisions made to the standard in this edition include the following: This may not be a standard practice for some manufacturers and, therefore, may result in increased cost and delivery time.
After the cycle testing, the actuator shall be completely disassembled and inspected to determine whether or not excessive wear or permanent deformation affecting its function has occurred. Producers of goods made in conformity with an American National Standard are encouraged to state on their own responsibility in advertising and promotional materials or on tags or labels that the goods are produced in conformity with particular American National Standards.
The designations A and B define the flow-rate capabilities with the valve in the fully open position. Valve port diameter b. Epoxy coatings are more likely to result in a holiday-free surface. If a large-diameter handwheel is of concern because of clearance or other limitations, the diameter should be limited to an acceptable dimension according to item 14 of Sec.
On completion of repair and reinstallation, notify the same personnel of the return of the valve and line to service. B IV V Introduction Revisions in and provided fine-tuning of the provisions of the standard. AWWA standards describe minimum requirements and do not contain all of the engineering and administrative information normally contained in specifications.
Until each optional feature is specified by the user, the product or service is not fully defined. At no point shall the shell thickness be more than Many butterfly valves have different sealing characteristics on one side vs.
awwq The person, company, or organization that purchases any materials or work c5004 be performed. Research has documented that pipe materials such as polyethylene, polybutylene, polyvinyl chloride, and asbestos cement; and elastomers, such as used in jointing gaskets and packing glands, may be subject to permeation by lower molecular weight organic solvents or petroleum products.
Specify any limitations on acceptability of seat materials or sprayed seats for specific applications or specific products. The connection between awwwa shaft and the disc shall be designed to transmit shaft torque equivalent to at least 75 percent of the torsional strength of the minimum required shaft diameters.
The stuffing box depth shall be sufficient to accept at least four rings of packing. There is no standard laying length for class flanged-end bodies or mechanical-joint end bodies, except as footnoted in Table 2. Type of shaft seal Sec.
ANSI AWWA C 橡胶垫密封蝴蝶阀_百度文库
If these or other chemical constituents are of concern, special requirements may be included in the purchase documents. Head loss analysis and Cv values shall be provided with the tender submission and will be taken into consideration by the Corporation during any tender analysis.
Science and Technology AWWA unites the entire water community by developing and distributing authoritative scientific and technological knowledge.
A drawing or description of the piping arrangement sufficient to describe significant turbulent line flow conditions to which the valve disc may be subjected. Accreditation of certification organizations may vary from jurisdiction to jurisdiction. The evaluations must include the determination awwwa the hydraulic characteristics of the system in which the valve will be installed and the operation of the valve on—off or throttlingincluding 1 the maximum transient and static differential pressure across the valve disc and 2 flow through the valve under the most adverse operating conditions.
Rubber seats applied to the valve body and penetrated by the valve shaft shall be adequately reinforced to prevent the seat from becoming inflated by pressure behind the seat. A flangeless awwx valve having a minimal face-to-face laying length designed to be installed between pipe flanges. Awa shall be drained of water.
VAG GA Series Butterfly Valve
The diviner shall incorporate the direction to open or close the valve. Valve actuators shall be equipped with adjustable, mechanical, stop-limiting devices wawa prevent overtravel of the valve disc in the open and closed positions. Valves under mm shall have the seats recessed in the body and supported on three sides. Thus, users of this standard should consult awa appropriate state or wwwa agency having jurisdiction in order to 1.
Reclaimed rubber shall not be used. Special devices or features if required: If the purchaser fails to specify a temperature range, differential pressure, flow, or classification, actuator sizing shall be based on the most severe conditions listed in this standard.
Manufacturers of butterfly valves developed tight-closing, rubber-seated types for cooling water systems and power stations. Standardized tests measuring resistance to chlorine- or chloramine-bearing waters were not available at the date of revision of this standard. Valve component materials Sec.
AWWA C504 Rubber Seated D.I Butterfly Valve
Lift these valves with eye bolts or rods through the flange holes or chain hooks at ends of the valve parts. Through its members, AWWA develops industry standards for products and processes that advance public health and safety.
Carbon steel shafts with stainless steel journals are not acceptable.