Описание: Describes the reduced-pressure principle backflow prevention assembly for potable water applications. The assembly shall be capable of withstanding a working water pressure of at least 150 psi (1,034 kPa) without damage to working parts or impairment of function and for operation on hot- or cold-water lines.
Описание: The purpose of this standard is to provide the minimum requirements for large-diameter flanged rubber-seated butterfly valve assemblies, suitable for freshwater and reclaimed water service. The standard can be referenced in contract documents for large-diameter rubber-seated butterfly valves, which are described by the scope as defined above.
Описание: Covers valves, fittings, service saddles, and meter setters for use in a service line from the main through the meter valve or meter-setting appurtenance. Valves, fittings, and meter setters described in this standard include 1/2 in. (12.5 mm) through 2 in. (50.8 mm).
Описание: Describes resilient-seated cast-iron eccentric plug valves, 3 in. (75 mm) through 72 in. (1,800 mm) in diameter, with flanged, grooved, or mechanical-joint ends, for water, wastewater, and reclaimed water systems having a pH range from 6 to 12 and a temperature range from 33F to 125F.
Описание: Describes hydraulic and pneumatic linear and quarter-turn actuators for operation of valves and slide gates in utility systems. The standard defines the minimum requirements for hydraulic and pneumatic actuators, such as sizing considerations, general design, materials, applications, painting and coatings, and data to be furnished by manufacturer.
Описание: Describes electric motor actuators for valves and slide gates in water, wastewater, and reclaimed water utility systems. Electric motor actuators are designed to produce a multiturn rotary motion output to actuate a multiturn valve or gate or to actuate an external gearhead for quarter-turn valves.
Описание: The effects of air and vacuum pockets present in a liquid piping system can negatively impact not only pump, meter, and control valve operation but can also be responsible for pipeline breaks and collapses. Choosing and installing the correct air valve is critical to all liquid piping systems. This manual of practice provides essential information for selecting, sizing, locating, and installing air valves in water, wastewater and reclaimed water pipeline systems. This revised second edition includes information pertaining to wastewater applications including scouring velocities for larger piping systems, and information on an inflow preventer device installed to protect from malicious tampering, freeze and flood, and to prevent the entry of contaminated water into the potable water distribution system. Operators, technicians, and engineers will use this manual to understand the design, use, application and maintenance of air valves. The air valve types listed in both ANSI/AWWA Standard C512, Air Release Valves, Air/Vacuum, and Combination Air Valves for Water and Wastewater Service and ANSI/AWWA C514, Air Valve and Vent Inflow Preventer Assemblies for Potable Water Distribution System and Storage Facilities are covered. Chapter topics include: locating air valves along a pipeline; design of valve orifice size; water hammer effects; and installation, operation, maintenance, and safety.
Описание: This manual offers current and practical approaches to nitrification prevention and response to a nitrification episode in chloraminated drinking water distribution systems.
Описание: Provides the minimum requirements for inflow preventer assemblies, including material design, inspection testing, marking, handling, and packaging for shipment. This standard can be referenced in documents for inflow preventer assemblies.
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