ASME A112.19.5:2005 pdf free download

ASME A112.19.5:2005 pdf free download.Trim for Water-Closet Bowls,Tanks,and Urinals.
2 DESIGN REQUIREMENTS
Thread dimensions shall be as given in Tables 1 and 2. The information provided in Nonmandatory Appendix A is the result of a series of calculations that are specified in ASMIi Bl.20.l. Dimensions for regular and reducing spuds shall be as shown in Tables I and 2.
Standard flush valves for gravity flush tanks shall conform to the dimensions of Fig. 3. The ID. 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.
Flush elbows shall conform to the dimen%ions in Fig. 2.
3 PERFORMANCE REQUIREMENTS
3.1 Dimensional Criteria for Spuds
Dimensions for spuds shall be as shown in Tables I and 2. Thread dimensions shall be 2—11.5 NPSM-1, 1’4. 11.5 NPSM-1, 1’4—11.5 NF’SM-l, and 4—14 NPSM-1 in accordance with ASME 131.20.1. (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. I a flush valve is threaded and is intended to he assembled to the fixture using a flush valve nut, either
(a) the threads shall be 2-11.5 NPSM Class I in accordance with ASME B1.20.1. They shall be inspected using ring and plug gages, or
() the flush valve and flush valve nut shall use an alternate thread configuration which shall be capable of being tightened to 10 lbI-ft (14 Nm) 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, it shall withstand a pull-out force of 60 lhf (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 notleak when tested in accordance with para. 4.3.
3.4Flush 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 lbf-ft(14 N-m). Wait 1 min and disassemble the flush valveand flush valve nut and examine for signs of damage.4.1.3 Performance Requirement.The flush valve andthe flush valve nut shall not have jumped threads norshall they show signs of damage when disassembled.