ASME A112.19.5:2017 pdf free download

ASME A112.19.5:2017 pdf free download Flush valves and spuds for water closets, urinals, and tanks
1.1 Scope
This Standard establishes criteria for those items oftrim for water-closet bowls,tanks, and urinals knownas spuds,locknuts for spuds,flush valves, and flushelbows. Requirements for fill valves (ballcocks) aredefined in ANSI /ASSE 1002.
This Standard does not address the compatibility ofmaterials. Nothing stated herein shall preclude the pro-duction of special design flush valves with unique non-standard features for use in low-consumption plumbingfixtures.
1.2 Units of Measurement
Values are generally stated in U.S. Customary unitsand International System of Units (SI).U.S.Customaryunits shall be considered as the standard.
1.3 Reference Standards
The following documents form a part of this Standardto the extent specified herein. The latest issue shall apply.ANSI / ASSE 1002, Performance Requirements for Anti-Siphon Fill Valves (Ballcocks) for Gravity Water ClosetFlush Tanks
Publisher: American Society of Sanitary Engineering(ASSE),901 Canterbury Road, Westlake, OH 44145ASME A112.19.2, Vitreous China Plumbing Fixtures andHydraulic Requirements for Water Closets andUrinals
ASME B1.20.1,Pipe Threads, General Purpose (Inch)Publisher: The American Society of Mechanical Engi-neers (ASME)，Three Park Avenue,New York,NY10016-5990; Order Department: 22 Law Drive,Box2300,Fairfield, NJ 07007-2300
ASTM F 409, Thermoplastic Accessible and ReplaceablePlastic Tube and Tubular Fittings
Publisher: American Society for Testing and Materials(ASTM),100 Barr Harbor Drive, West Conshohocken,PA 19428-2959
1.4Definitions
flush vale flapper: an elastomeric flush valve componentthat combines in one piece a pair of lever arms, a valveseat 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.
DESIGN REQUIREMENTS
Thread dimensions shall be as given in Tables 1 and2.The information provided in Nonmandatory Appen-dix A is the result of a series of calculations that arespecified in ASME B1.20.1.Dimensions for regular andreducing spuds shall be as shown in Tables 1 and 2.Standard flush valves for gravity flush tanks shallconform to the dimensions of Fig. 1.The1.D.requirementin Fig. 1 is only applicable to aftermarket flush valves.For water-closet tank manufacturers, the Overflow Testfor Gravity Tank requirement of ASME A112.19.2 shallapply.
Flush elbows shall conform to the dimensions in Fig.2.
3PERFORMANCE REQUIREMENTS
3.1 Dimensional Criteria for Spuds
Dimensions for spuds shall be as shown in Tables 1and 2.Thread dimensions shall be 2-11.5 NPSM-1,115-11.5 NPSM-1,11/4-11.5 NPSM-1,and 3/4-14 NPSM-1 inaccordance with ASME B1.20.1.(All thread dimensionsare Class 1.) Thread dimensions shall be inspected usingring and plug gages.
3.2 Flush Valve — Means of Assembly
3.2.1 Threaded Attachment. If a flush valve isthreaded and is intended to be assembled to the fixtureusing 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 usingring and plug gages, or
b) the flush valve and flush valve nut shall use analternate thread configuration which shall be capable ofbeing tightened to 10 lbf-ft (14 Nm) of torque,whentested in accordance with para.4.1.
3.2.2 Nonthreaded Attachment. If a flush valve is tobe assembled to the flush tank by any means other thana threaded attachment, it shall withstand a pull-out forceof 60 1bf (267 N) when tested in accordance withpara.4.2.
Flush valves assembled to one-piece water closets byother 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 notleak when tested in accordance with para.4.3.
3.4 Flush Valve Seals – Chemical Durability
lf a flush valve has a flush valve seal or flush valveflapper, the seal or flapper shall comply with the leak testrequirements when tested in accordance with para. 4.4.
4TEST PROCEDURES
4.1 Flush Valve Assembly – Alternate Thread Torque
Test
4.1.1 Criteria.The flush valve and flush valve nutwith an alternative thread shall withstand a torque of10 lbf-ft (14 N-m).
4.1.2 Test Method.Assemble the flush valve to asmooth 0.5 in. (13 mm) thick aluminum plate with ahole bored through it that measures 0.040 in. to 0.200 in.(1 mm to 5 mm) larger than the outer diameter of theflush valve threads using the matching flush valve nut.Tighten the flush valve nut to a torque of 10 1bf-ft(14 N-m). Wait 1 min and disassemble the flush valveand flush valve nut and examine for signs of damage.