ASME A112.19.5-2005 pdf download.Trim for Water-Closet Bowls, Tanks, and Urinals.
1 GENERAL 1.1 Scope This Standard establishes criteria for those items of trim for water-closet bowls, tanks, and urinals known as spuds, locknuts for spuds, flush valves, and flush elbows. Requirements for fill valves (ballcocks) are defined in ANSI/ASSE 1002. This Standard does not address the compatibility of materials. Nothing stated herein shall preclude the pro- duction of special design flush valves with unique non- standard features for use in low-consumption plumbing fixtures. 1.2 Units of Measurement Values are generally stated in U.S. Customary units and International System of Units (SI). U.S. Customary units shall be considered as the standard. 1.3 Reference Standards The following documents form a part of this Standard to the extentspecified herein. The latestissue shall apply. ANSI/ASSE 1002, Performance Requirements for Anti- Siphon Fill Valves (Ballcocks) for Gravity Water Closet Flush Tanks Publisher: American Society of Sanitary Engineering (ASSE), 901 Canterbury Road, Westlake, OH 44145 ASME A112.19.2, Vitreous China Plumbing Fixtures and Hydraulic Requirements for Water Closets and Urinals ASME B1.20.1, Pipe Threads, General Purpose (Inch) Publisher: The American Society of Mechanical Engi- neers (ASME), Three Park Avenue, New York, NY 10016-5990; Order Department: 22 Law Drive, Box 2300, Fairfield, NJ 07007-2300 ASTM F 409, Thermoplastic Accessible and Replaceable Plastic Tube and Tubular Fittings Publisher: American Society for Testing and Materials (ASTM), 100 Barr Harbor Drive, West Conshohocken, PA 19428-2959 1.4 Definitions flush valve flapper: an elastomeric flush valve component that combines in one piece a pair of lever arms, a valve seat sealing surface, and sometimes a float.
flush valve seal: a flush valve component, typically elasto- meric that serves as the flush valve sealing component. A flush valve flapper is one type of flush valve seal. 2 DESIGN REQUIREMENTS Thread dimensions shall be as given in Tables 1 and 2. The information provided in Nonmandatory Appen- dix A is the result of a series of calculations that are specified in ASME B1.20.1. Dimensions for regular and reducing spuds shall be as shown in Tables 1 and 2. Standard flush valves for gravity flush tanks shall conformto thedimensions ofFig. 1. TheI.D. requirement in Fig. 1 is only applicable to aftermarket flush valves. For water-closet tank manufacturers, the Overflow Test for Gravity Tank requirement of ASME A112.19.2 shall apply. Flushelbows shallconformto the dimensions inFig. 2. 3 PERFORMANCE REQUIREMENTS 3.1 Dimensional Criteria for Spuds Dimensions for spuds shall be as shown in Tables 1 and 2. Thread dimensions shall be 2–11.5 NPSM-1, 1 1 ⁄ 2 – 11.5 NPSM-1, 1 1 ⁄ 4 –11.5 NPSM-1, and 3 ⁄ 4 –14 NPSM-1 in accordance with ASME B1.20.1. (All thread dimensions are Class 1.) Thread dimensions shall be inspected using ring and plug gages. 3.2 Flush Valve — Means of Assembly 3.2.1 Threaded Attachment. If a flush valve is threaded and is intended to be assembled to the fixture using a flush valve nut, either (a) the threads shall be 2-11.5 NPSM Class 1 in accor- dance with ASME B1.20.1. They shall be inspected using ring and plug gages, or (b) the flush valve and flush valve nut shall use an alternate thread configuration which shall be capable of being tightened to 10 lbf-ft (14 N·m) of torque, when tested in accordance with para. 4.1. 3.2.2 Nonthreaded Attachment. If a flush valve is to be assembled to the flush tank by any means other than a threaded attachment, itshall withstand a pull-outforce of 60 lbf (267 N) when tested in accordance with para. 4.2. Flush valves assembled to one-piece water closets by other means shall only be subjected to the leak test.
3.3 Flush Valve to Flush Tank Seal The joint between the fixture and flush valve shall not leak when tested in accordance with para. 4.3. 3.4 Flush Valve Seals — Chemical Durability If a flush valve has a flush valve seal or flush valve flapper, the seal orflappershall complywiththe leaktest requirements when tested in accordance with para. 4.4. 4 TEST PROCEDURES 4.1 Flush Valve Assembly — Alternate Thread Torque Test 4.1.1 Criteria. The flush valve and flush valve nut with an alternative thread shall withstand a torque of 10 lbf-ft (14 N·m). 4.1.2 Test Method. Assemble the flush valve to a smooth 0.5 in. (13 mm) thick aluminum plate with a hole bored through it that measures 0.040 in. to 0.200 in. (1 mm to 5 mm) larger than the outer diameter of the flush valve threads using the matching flush valve nut. Tighten the flush valve nut to a torque of 10 lbf-ft (14 N·m). Wait 1 min and disassemble the flush valve and flush valve nut and examine for signs of damage. 4.1.3 Performance Requirement. The flush valve and the flush valve nut shall not have jumped threads nor shall they show signs of damage when disassembled.