ASME A112.18.8:2020 pdf free download

ASME A112.18.8:2020 pdf free download.Sanitary Waste Valves for Plumbing Drainage Systems.
3.2 One-Way SeaLing Performance of the VaLve
3.2.1 Test Apparatus. The test apparatus is as follows:
(a) length of 4 in. (6 mm) bore rubber tubing
(b) tee-junction suitable for use with the rubber tubing
(c) u-tube manometer with a range of 0 in. (0 mm) to 6 in. (152 mm) of water, gage
(d) reducer to enable the rubber tube to be connected to the outlet of the valve
3.2.2 Test Method, Pnme the valve by running a gallon of water through the valve to waste. Connect the rubber tubing through the reducer to the outlet of the valve. Connect the other end of the tube to the tee-junction, one leg of which Is connected to the u-tube manometer and the remaining leg to another length oftubing. Apply air pressureto the free end of the tubing until a pressure o14 in. (102 mm) of water, gage. Is registered on the u-tube manometer. Clamp the end of the tube and maintain pressure for 20 sec. Release the pressure and leave the valve and equipment in situ bra minimum of 48 hr. then retest under the same conditions but omit the water priming stage.
3.2.3 Performance Requirements. The valve shall retain a seal under a back pressure, equivalent to 4 in. (102mm) of water, gage, for 20 sec on both the Initial test (with valve primed) and the retest.
3.3 Airway Flow Rate
3.3.1 Test Method. The airway flow rate test shall be performed in accordance with ANSI/ASSE 1051-2009, paras.
3.12 through 3.2.3.
3.3.2 Performance Requirements. The maximum opening pressure oIthe device shall meet the requirements oIANSI/ ASSE 1051-2009, para. 3.2.4. The measured airflow rate shall be at least 1 ft3/min (0.47 L/s) In accordance with the requirements for 14-ln. and 1’/2.in. drainage systems in ANSI/ASSE 1051-2009, para. 1.2.3 and Table 1.
3.4 Recoveiy From an Excess Back Pressure (Inversion) Condition
3.4.1 Test Method. Fit the valve to be tested to a standard sink and connect the arrangement of pipe work shown in Figure 3,4.1-Ito the outlet of the valve. Close valve at point B. Slowly open valve C until the bladder inverts and water flows into the sink. Record the pressure atthe point of inversion. Close valve C; open valve 8. lnsertthe sink plug and fill the sink with water to level A.
NOTE: Failure of the bladder to Invert shall not constitute a lailure of the test or a reason to stop the test
3.4.2 Performance Requirements. When the sink plug is removed, the sink shall completely drain. At the completion of the test in para. 3.4.1, the valve shall be tested in accordance with paras. 3.1 and 3.2. Failure to achieve the performance parameters prescribed in paras. 3.1 and 3.2 shall be cause for rejection of the valve.
3.5 Leak Tightness
3.5.1 Test Method, The valve shall be tested in accordance with the hydrostatic pressure test in ASTM F409 using an internal pressure of 25 psi (172 kPa) for 1 hr.
3.5.2 Performance Requirements. The valve shall show no evidence of leak.age and demonstrate air tightness.
3.6 ThermaL CycLing
3.6.1 Test Requirement. The valve shall complete the following thermal cyding test procedure for S cycles and allowS sec of draining time between cycles:
fr.1 7.9 gpm (30 L/min) of water at a temperature of 203°F ±4°F (95°C ± 2°C) over a period of 15 mm at a constant flow rate.