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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Protective coatings, if other than specified in Sec. For any overlay, the following performance items are required: A bearing of corrosion-resistant material shall be provided on the shaft outboard of the shaft seal or in the actuator housing to protect awwq shaft seal from side-thrust forces developed in the operating mechanism. The lower valve shaft shall incorporate a dual thrust bearing to permit valve positioning in a degree circumference.
Turbulence will be considered only if information on piping conditions is provided according to cc504 27 of Sec. Do not expose rubber seats to sunlight or ozone for any extended period. If this information is not provided, class B valve classifications will be provided and actuators will be sized for the most severe conditions listed in this standard. The disc shall be awwa of hollow chambers. Be sure to check the actuator directional switch against the direction indicated on wrench nut, handwheel, or records before applying opening or closing torque.
The width of the seat surface shall, at a minimum, cover the entire surface wiped by, or in contact with, the rubber seat. If these or other chemical constituents are of concern, special requirements may be included in the purchase documents. 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.
Uncoated steel and iron-machined surfaces shall be coated with a corrosion inhibitor.
Mueller Group, Smithfield, R. This standard requires flat-faced flanges.
Two eye bolts shall be supplied with each valve. The records of these tests shall be made available to the purchaser if agreed on by the purchaser awsa manufacturer.
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 of the two different shaft diameters.
Each valve shall have a one-piece shaft extending completely through the valve disc or have a stub-shaft arrangement, as described below.
If O-rings are used, they shall be contained in a removable cartridge constructed of corrosion-resistant metallic materials referenced in Sec. American National Standard An American National Standard implies a consensus of those substantially concerned with its scope and provisions.
Direction to turn the handwheel, chainwheel, or wrench nut to open valves. When selecting this option, all flange holes shall be tapped. Valve seats shall be designed to be leak-tight in both directions at differential pressures up to, and including, the rated pressure of the valve class. Some variations from this format may be found in a particular standard.
The maximum anticipated fluid velocity through the valve, maximum nonshock shutoff pressure, water temperature range, and valve classification are used by manufacturers to calculate torque requirements, which then may determine valve operating-component design and actuator sizing. If loose, tighten firmly.
The valve is bubble tight at full rated pressure allowing for dead end service. Hartman, Hartman Valve Corporation, St.
Use of This Standard. 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 affect the corrosivity of these chemicals.
Torque, Head Loss, and Cavitation Analysis, is required.
VF264 AWWA C504 Double Flanged
Rubber compounds shall contain no more than 1. Valves shall be fitted with sleeve-type bearings contained in the hubs of the valve body.
AWWA is the authoritative resource for knowledge, information, and advocacy to improve the quality and supply of water in North America and beyond. The test is to be performed in each direction across the disc, and, in the case of flanged valves, the valve body shall be bolted to a flanged test head.
Ductile Iron AWWA Butterfly Valve, Rs /piece, SVR Global Solutions India | ID:
Each valve shall be equipped with either one or two thrust bearings, which shall hold the valve disc securely in the center of the valve seat. If a maximum head loss is required. The alternative hydrostatic leakage test, per Sec. Refer to item 28 of Sec. The disc shall be designed to withstand full differential pressures across the closed valve disc without exceeding a stress level equivalent to one fifth of the tensile strength of the material.
If aawa affidavit of compliance is required with the provisions of this standard signed by the valve manufacturer Sec.
If shop inspection by the purchaser is required. Pressure classes as defined in Sec.
Rotork: AB AWWA C And C
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. Successful completion of the test will identify the design methods used in a series of actuators within the torque ranges listed as suitable.
If a leakage test in both directions is required.