ASME A112.1002-2020 pdf download

ASME A112.1002-2020 pdf download.Anti-siphon fill valves for water closet tanks.
c) Using water at a temperature of 49 ± 3 °C (120 ± 5 °F) and a static pressure of 860 ± 14 kPa (125 ± 2 psi), flush the water closet tank every 5 mm ± 15 s for a total of 50 cycles using a flush volume between 3.8 and 7.6 L (1.0 and 2.0 gal).
d) Increase the static pressure to 1035 ± 14 kPa (150 ± 2 psi) and maintain it for 5 mm ± 15 s.
e) Check the specimen for leakage, distortion, or other damage that could affect its performance.
4.4.1.3 Performance criteria
There shall be no leakage, distortion, or other damage that affects the performance of the device. The refill tube shall remain in place throughout the test.
4.4.2 Static and dynamic seals, working pressure test
4.4.2.1 Purpose
The purpose of this test is to determine the static and dynamic seal performance of the device at pressures between 140 and 860 kPa (20 and 125 psi).
4.4.2.2 Procedure with the valve closed
With the valve in the closed position, test the specimen according to Clause 4.4.2.4 for 5 mm ± 15 s for each condition.
4.4.2.3 Procedure with the outlet(s) blocked
With the valve in the fully open position, block the outlet(s) and test the specimen according to
Clause 4.4.2.4 for 5 mm ± 15 s for each condition.
Where the outlet is difficult to block, the pressures listed in Clause 4.4.2.4.2 a) and 4.4.2.4.2 b) shall be flowing pressures rather than static pressures.
4.4.2.4 Test temperatures and pressures
4.4.2.4.1
The test for static and dynamic seals shall be conducted in an ambient environment. The specimen shall be brought to equilibrium test temperature by running water through it.
4.4.2.4.2
Test temperatures and pressures shall be as follows:
a) 140 ± 14 kPa and 10 ± 6 °C (20 ± 2 psi and 50 ± 10 °F); and
b) 860 ± 14 kPa and 10 ± 6 °C (125 ± 2 psi and 50 ± 10 °F).
4.4.2.5 Performance criteria
There shall be no leakage.
4.5 Life cycle test
4.5.1 Purpose
The purpose of this test is to demonstrate the long-term operational performance of the device.
4.5.2 Test conditions
The test shall be conducted with water at a
a) temperature of 21 ± 5 °C (70 ± 10 °F);
b) supply pressure of 620 kPa (90 psi) minimum; and
c) flowing pressure of 480 kPa (70 psi) minimum.
4.5.3 Procedure
The life cycle test shall be conducted as follows:
a) Install the fill valve in a tank in accordance with the manufacturer’s instructions.
b) The water in the tank may be displaced to accelerate the test.
c) Operate the fill valve for 150,000 cycles by filling the tank for each cycle. Cycle duration shall not exceed 1 mm.
d) Increase the static pressure to 860 ± 14 kPa (125 ± 2 psi) for 5 mm ± 15 s.
e) Check the fill valve for leakage, distortion, or other damage that could affect its performance.
4.5.4 Performance criteria
There shall be no leakage, distortion, or other damage that affects the fill valve’s performance. The refill tube shall remain in place on the fill valve throughout the test.
4.6 Critical level and backflow prevention tests
4.6.1 Purpose
The purpose of this test is to verify the critical level (CL) marking, and ensure that the backflow prevention features function as intended.
4.6.2 Procedure
4.6.2.1 Set-up
4.6.2.1.1 Test water
Manually fill the test tank to the level required with clear or coloured water at 10 ± 6 °C (50 ± 10 °F).
When coloured water is used it shall be prepared separately as follows:
a) Add methylene blue dye powder to water in a concentration of approximately 1.5 g/L (0.013 lb/gal) and mix thoroughly.
b) Mix the solution in Item a) with water in a ratio of 5 mL/L (0.64 oz/gal).
4.6.2.1.2 Check member fouling
All check members of the specimen shall be fouled using a 0.81 ± 0.10 mm (0.032 ± 0.004 in) diameter fouling wire as follows:
a) On check members that are hinged, the wire shall be placed in the 90° quadrant opposite to the hinge point or point of suspension.
b) On check members that move axially, the wire shall be placed at a single point on the seating area. The fouling wire shall follow the cross-sectional contour of the check member.
c) When devices have other types of moving parts for check members, those parts shall be spaced so as to comply with the intent of this Clause.