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AWWA C515 - REDUCED-WALL, RESILIENT-SEATED GATE VALVES FOR WATER SUPPLY SERVICE Organization: AWWA
Date: 2015-06-07
Description: This standard describes reduced-wall, resilient-seated gate valves with nonrising stems (NRS) and outside screw-and-yoke (OS&Y) rising stems, including tapping gate valves, for water supply service having a temperature range of 33° to 125°F (0.6° to 52°C).
AWWA C500 - METAL-SEATED GATE VALVES FOR WATER SUPPLY SERVICE Organization: AWWA
Date: 2009-01-25
Description: This standard describes iron-body, brass-mounted, nonrising-stem (NRS) gate valves, including tapping gate valves, 3-in. (75-mm) NPS through 48-in. (1,200-mm) NPS, and outside screw and yoke (OS&Y) rising-stem gate valves, 3-in. (75-mm) NPS through 24-in. (600-mm) NPS, with either double-disc gates having parallel or inclined seats, or solid-wedge gates.
AWWA C509 - RESILIENT-SEATED GATE VALVES FOR WATER SUPPLY SERVICE Organization: AWWA
Date: 2015-06-07
Description: This standard describes iron-body resilient-seated gate valves with nonrising stems (NRS) and outside screw-and-yoke (OS&Y) rising stems, including tapping gate valves, for water supply service having a temperature range of 33° to 125°F (0.6° to 52°C).
AWWA C520 - KNIFE GATE VALVES, SIZES 2 IN. (50 MM) THROUGH 96 IN. (2,400 MM) Organization: AWWA
Date: 2014-06-08
Description: This standard describes bonneted, bonnetless, cast, and fabricated steel; stainless-steel; and cast ductile-iron body knife gate valves with resilient or metal seats, including tapping knife gate valves, for use in water, wastewater, and reclaimed water systems with pH range from 6 to 12 and a temperature range from 33°F to 125°F (0.6°C to 52°C).
TSE - TS 12844 - COMPETENT SERVICES- FOR VALVES- RULES Organization: TSE
Date: 2002-04-12
Description: This standard includes rules for management, structural, properties, technical equipment and personnel characteristies of competent services for aatves ball, gate, stop, canical, butterfly, electrical and pneumatic (proportianal and/or on-off) slenaid check, safety, pressure, three and for mays (mixingand distrubution valve) tap, battery, bas valves used in gas installations, ext. It does not include cylinder valve.
NASA-LLIS-0499 - LESSONS LEARNED - PRESSURE VERIFICATION DURING PRESSURE SYSTEMS OPERATIONS AND MAINTENANCE Organization: NASA
Date: 1996-12-09
Description: After the valve bolts were removed and the employee tapped on the valve to loosen it, the valve flew off and hit one of the maintenance employees.

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