Abstract： ASME A112.19.5:2005 pdf download.Trim for Water-ClosetBowls, 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 ca...

ASME A112.19.5:2005 pdf download.Trim for Water-ClosetBowls, 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 ASME 131.20.1. 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. 1. The l.D. requirement in

Fig. I 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 dimensions 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, V4.

11.5 NPSM-1, 1/4—1l.5 NPSM-1, and —l4 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. 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 I in accordance 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 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.

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