AWWA C512:2004 pdf download.Air-Release, Air/Vacuum, and Combination Air Valves for Waterworks Service
If requested by the purchaser, the manufacturer or supplier shall provide the following information:
4.1.1 Catalog data. The catalog data shall include illustrations, valve perfor- mance data, a parts schedule that identifies the materials used for various parts, and a statement of the total net assembled weight for each valve size.
4.1.2 Certified drawings. A set of certified drawings shall include principal dimensions, construction details, and materials used for all parts of the valve.
4.1.3 Operating manual. An operating manual shall include the manufac- turer’s installation and operating instructions, a recommended list of spare parts, and the maintenance procedures. The contents shall be sufficiently detailed to direct the assembly and disassembly of the valve and for the ordering of parts.
Before the application of any external coating, the completely assembled valve shall be hydrostatically tested to ensure proper operation. If an internal coating is required by the purchaser, the hydrostatic shell test of the body and cover is permitted before assembly to establish the integrity of the body and cover castings prior to applying the internal coating. After the internal coating is applied, the assembled valve shall be hydrostatically tested as outlined below.
5.1.1 Shell test. With the valve completely closed, an internal hydrostatic pressure equal to 150 percent of the maximum working pressure shall be applied. During the test, there shall be no evidence of leakage through the valve, nor shall any part show evidence of permanent damage or distortion.
5.1.2.1 Hydrostatic test. Each valve shall be tested at two internal hydrostatic pressures: (1) a minimum pressure of 20 psig (138 kPa [gauge]), unless otherwise specified by the purchaser; and (2) a maximum pressure equal to 150 percent of the maximum working pressure of the valve, with the opposite end, or outlet of the valve, open to atmosphere. The duration of each test shall be at least 30 sec. At the test pressures, the valve shall be drop-tight (zero leakage).AWWA C512 pdf download.