Jul,14

ASME A112.18.8 pdf download

ASME A112.18.8 pdf download

ASME A112.18.8 pdf download Sanitary Waste Valves for Plumbing Drainage Systems
3.1.2 Performance Requirements. The valve shall demonstrate flow rates not less than
(a) 1 1 ∕ 4 in. (31.8 mm): 9.5 gpm (36 L/min), valve alone on wash basin, bidet
(b) 1 1 ∕ 2 in. (38.1 mm): 13.5 gpm (51 L/min), valve alone on bath
(c) 1 1 ∕ 2 in. (38.1 mm): 11.1 gpm (42 L/min), valve alone on kitchen sink
3.2 One-Way Sealing Performance of the Valve
3.2.1 Test Apparatus. The test apparatus is as follows:
(a) length of 1 ∕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 TestMethod. Prime the valve byrunningagallonofwaterthroughthe valve to waste. Connecttherubbertubing through the reducer to the outlet ofthe valve. Connect the other end ofthe tube to the tee-junction, one leg ofwhich is connectedtotheu-tubemanometerandtheremaininglegtoanotherlengthoftubing. Applyairpressuretothefreeendof the tubing until a pressure of4 in. (102 mm) ofwater, gage, is registered on the u-tube manometer. Clamp the end ofthe tubeandmaintainpressurefor20 sec.Releasethepressureandleavethevalveandequipmentinsituforaminimumof48 hr, then retest under the same conditions but omit the water priming stage.
3.2.3 Performance Requirements. The valve shall retain a seal undera backpressure, equivalentto 4 in. (102 mm) 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.
3.2.2 through 3.2.3.
3.3.2 PerformanceRequirements.ThemaximumopeningpressureofthedeviceshallmeettherequirementsofANSI/ ASSE 1051-2009, para. 3.2.4. The measured airflow rate shall be at least 1 ft 3 /min (0.47 L/s) in accordance with the requirements for 1 1 ∕ 4 -in. and 1 1 ∕ 2 -in. drainage systems in ANSI/ASSE 1051-2009, para. 1.2.3 and Table 1. 3.4 Recovery 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 ofpipe work shown in Figure 3.4.1-1 to the outlet ofthe valve. Close valve at point B. Slowly open valve C until the bladder inverts and water flowsintothesink.Recordthepressureatthepointofinversion.ClosevalveC; openvalveB.Insertthesinkplugandfillthe sink with water to level A. NOTE: Failure of the bladder to invert shall not constitute a failure of the test or a reason to stop the test. 3.4.2 Performance Requirements. When the sinkplug is removed, the sinkshall completely drain. Atthe completion ofthe testinpara. 3.4.1, the valve shall be testedinaccordance with paras. 3.1 and3.2. Failureto 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 testin 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 leakage and demonstrate air tightness.
3.6 Thermal Cycling
3.6.1 TestRequirement. Thevalve shallcompletethefollowingthermalcyclingtestprocedurefor5 cycles andallow5 sec of draining time between cycles: (a) 7.9 gpm(30 L/min) ofwateratatemperature of203°F± 4°F(95°C ± 2°C) overaperiodof15 minataconstantflow rate (b) 7.9 gpm(30 L/min) ofwateratatemperature of68°F± 10°F (20°C ± 5°C) overaperiodof10 minataconstantflow rate
3.6.2 Performance Requirements. At the completion ofthe above test, the valve shall be tested in accordance with para. 3.2 and meet the requirements of para. 3.2.3. 3.7 Cyclic Fatigue
3.7.1 Test Requirement. The valve shall complete the following cyclic fatigue test procedure allowing 60 sec for draining between cycles: 1,500 cycles of60 sec ± 2 sec duration, at a temperature of200°F ± 4°F (93°C ± 2°C) followed by 60 sec at a temperature of 59°F ± 10°F (15°C ± 5°C), flow rate 7.9 gpm ± 0.1 gpm (30 L/min ± 0.5 L/min). 3.7.2 Performance Requirements. At the completion of the above test, the valve shall be tested in accordance with para. 3.2 and meet the requirements of para. 3.2.3.
3.8 Resistance to Household Substances
3.8.1 Test Apparatus. The valve shall be attached to a sink fitted with a standard crosspiece outlet. 3.8.2 SubstancestoBeTested.Aseparatetestshallbecarriedoutforeachofthefollowingfivematerials.Foreachtest, a 1.5-oz (43-g) or 1.5-fl. oz. (44-mL) sample of material shall be used.

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