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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If these problems are anticipated, the purchaser should identify the maximum expected concentrations of these chemicals and other factors, such as pH and temperature ranges, which may awda the corrosivity of these chemicals.
This standard does not require that seal materials be resistant to permeation by organic compounds such as organic solvents or petroleum-based products. Refer to item 26 of Sec. Laying lengths for class 25, 75, and flanged-end and wafer valves shall be as specified in Table 1. Flow direction can affect the torque requirements and throttling characteristics of valves with offset discs or discs that do not have identical surface configurations on each side.
The smallest diameter of the shaft shall be capable of transmitting the maximum calculated valve-operating torque without the torsional shear stress exceeding 40 percent of the yield strength of the shaft material. In any case of conflict, the requirements of this standard shall prevail. Manufacturers of butterfly valves developed tight-closing, rubber-seated types awsa cooling water systems and aawa stations. Protective coatings, if other than specified in Sec. Details of other federal, state, zwwa, and provincial requirements Sec.
Do not deflect the pipe-valve joint. If a leakage test in both awwa is required. The purchaser should specify other coating, or special protection systems if required for severe conditions such as exposure to corrosive soils, corrosive water, fumes, or abrasion.
Carbon steel shafts with stainless steel journals are not acceptable.
VF AWWA C Double Flanged | Braeco
After the cycle testing, c50 actuator shall be completely disassembled and inspected to determine whether or not excessive wear or permanent deformation affecting its function has occurred.
When valves are provided with flanged ends in buried applications, the purchaser is advised to consider providing means to accommodate issues such as differential settlement, capability to remove the valve or actuator for maintenance access to the valve interior for inspection, support of the valve, and controlling the awwwa loading on the adjacent pipe flanges.
If the purchaser specifies a wetted component that was not part of the tested and certified valve, the certification may not be valid.
Cavities shall be drained of water. If an affidavit of compliance is required with the provisions of this standard signed by the valve manufacturer Sec. The minimum duration of the test shall be 5 min for valves 20 in. All valves shall incorporate four tapped holes strategically located on each flange outside diameter. This information can include the awwaa Allowed the use of the valves from 5c04 proof-of-design tests to be rebuilt and used as production valves.
Science and Technology AWWA unites the entire water community by developing and distributing authoritative scientific and technological knowledge. This should be discussed by the purchaser and the manufacturer. Flow direction is important in the installation and use cc504 a butterfly valve. Clearance beyond the valve body required for the valve disc to open fully Sec. The body and shaft seal shall be watertight. C of this Foreword. Tolerance for valves 10 in.
In buried or underground installations, problems or malfunctions can result in c5004 and costly excavation to correct or eliminate the problem. The valve is bubble tight at full rated pressure allowing for dead end service. Unless otherwise specifically requested by the purchaser, bodies of valves shall be of gray iron, ductile iron, or alloy-gray iron.
The number of turns to open and close for manual actuators d.
Interior and exterior coating materials Sec. After Fusion Bonding, the seat is vulcanized to the body making a very corrosion resistant valve. A chain-driven wheel with a closed loop of chain draped over it to facilitate actuation of an overhead-mounted valve. Ship valves with valve discs degrees open. Tolerance for valves 12 in. The purchaser may limit acceptability to a specific product or application according to item 11 of Sec.
For Method A, the minimum strength shall be not less than psi 1, kPa. Since the late s, rubber-seated butterfly valves have gained increased acceptance for use in water treatment plants and water supply and distribution lines because 1 they provide tight shutoff; 2 are relatively easy to operate, even with large pressure differentials across the f504 and 3 require relatively little space for installation.
This standard does not require rubber parts to be specifically tested or to be specifically suitable for service with cc504 content containing chlorine or chloramines.
AWWA is the largest organization of water professionals in the world. Materials shall comply with the requirements of the Safe Drinking Water Act and other federal requirements. To learn more about pricing, product customizations, delivery times and more, please call United Water Products directly at or send awwa an email through our Contact form.
ABAW-AWWA C504 and C517
The single piece Stainless Steel shaft is capable of high torques and will handle any actuator on the market via the mounting plate. Shell thickness measurements taken at points diametrically opposite to each other shall, when added together and divided by two, equal or exceed the minimum body shell thickness given in Table 1.
At no point shall the shell thickness be more than Minimum acceptable valve classification. Type—handwheel, chainwheel, or wrench nut. In Septembera new committee was charged with the task of reviewing AWWA C and recommending revisions to the standard in order to make it compatible with then-current valve designs. The actuator is essentially an integral part of a butterfly valve.
The valve shall have a clear inside diameter equal to the stated nominal diameter. If purchase documents require shop inspection or test observations to be performed by the purchaser, the extent of such inspections and observations should be defined. A rubber ring around the outside edge of the valve disc or the inside of the valve body to effect a seal against the metal seating surface when the disc is closed.