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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Corrosion-resistant metals used for clamping and retaining rubber seats, shaft and disc connection hardware, glands or gland assemblies, thrust bearings, and O-ring removable recesses that are wetted by line content shall be made of stainless steel, nickel-copper alloy, or bronze, conforming to the aforementioned requirements.
Val-Matic Valve & Manufacturing Corporation
A drawing or description of the piping arrangement sufficient to describe significant turbulent line flow conditions to which the valve disc may be subjected. Valve port diameter b. The purchaser should consult with c054 manufacturers and, if appropriate, specify special requirements for these components. Safety factors are the ratio of cylinder torque to required valve operating torque TR.
Whenever valve components are to be made in conformance with ASTM or other standards that include test requirements or testing procedures, the valve manufacturer shall meet these requirements or procedures. This should be discussed by the purchaser and the manufacturer. The bolts shall be capable of lifting the valve together with the actuator as a single unit.
Thus, users of this standard should consult the appropriate state or local agency having jurisdiction in order to 1.
Bearings awda be designed for a pressure not to exceed the published design load for the bearing material or one-fifth d504 compressive strength of the bearing or shaft material. Valves under mm shall have the seats recessed in the body and supported on three sides. Do not expose rubber seats to sunlight or ozone for any extended period. Rubber compounds shall contain no more than 1.
Model Maintenance and Operation Manual. At no point shall the shell thickness be more than Valve actuators shall be equipped with adjustable, mechanical, stop-limiting devices to prevent overtravel of the valve disc in the open and closed positions.
Piping configurations that produce a non-uniform or turbulent flow pattern upstream of the valve can increase torque requirements, create damaging vibrations, increase head loss, and increase stresses in valve components. 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.
Direction to turn the handwheel, chainwheel, or wrench nut to open valves. Valves mm and larger shall have seats bi-directionally field adjustable around the full degree circumference, under full pressure from the perimeter without removal of the valve.
There is no standard laying length for class flanged-end bodies or mechanical-joint end bodies, except as footnoted in Table 2.
B IV V Introduction Valves, hydrants and pipeline accessories for Water Works and Fire Protection. 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. 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 awa valve interior for inspection, awwwa of the valve, and controlling the shear loading on the adjacent pipe flanges.
AWWA C Rubber Seated D.I Butterfly Valve – GLOFA VALVE CORP. I GLOFA VALVE MANUFACTURER
Do not deflect the pipe-valve joint. Valve and actuator arrangement and position. In buried or underground cc504, problems or malfunctions can result in extensive and awaw excavation to correct or eliminate the problem.
The possibility of groundwater or surface water entering the valve and the disposal of the water should be considered. Butterfly valves are generally used for pipelines carrying liquids and gases. AWWA standards are intended to represent a consensus of the water supply industry that the product described will provide satisfactory service.
AWWA C504 Rubber Seated D.I Butterfly Valve
Valve seats shall be field replaceable without the requirements of pressure to the disc. Interior and exterior coating materials Sec.
Generally, modern butterfly-valve designs for water service include cast-body construction in psi kPapsi kPapsi 1,kPaand psi 1,kPa pressure classes; flanged, mechanical-joint, and wafer bodies; rubber seats in wawa bodies or on the valve discs; and operating conditions limited by the design shutoff pressure and velocities of water flow that produce torques considered maximum for the shaft size used.
Test duration shall be at least 1 min for valves 8 in. If shop inspection by the purchaser is required. Minimum operating time shall be 30 sec.