1、Performance Requirements for Individual and Branch Type Air Admittance Valves for Chemical Waste SystemsAmerican Society of Sanitary EngineeringASSE Standard #1049-2009ASSE Board Approved: May, 2009ANSI Approved: January, 2010An American National StandardIndividual and Branch Type Air Admittance Val
2、ves for Chemical Waste Systems iASSE Standard 1049 - 2009American Society of Sanitary EngineeringWestlake, OhioCopyright 2009All rights reserved. Neither this standard, nor any portion thereof, may be reproduced without the written consent of the American Society of Sanitary Engineering.No product m
3、ay be said to be ASSE approved unless the manufacturer has applied to the ASSE, has had the product tested by an official ASSE recognized independent laboratory, have passed the test according to the applicable ASSE Standard, and has been reviewed and approved by the consensus ASSE Seal Control Boar
4、d. Having completed the aforementioned, the manufacturer may then display the ASSE Seal on the product.Instructions for receiving the authorization to display the Seal are available from ASSEs International Office. Organizations wishing to adopt or list any ASSE Standard should print the ASSE Standa
5、rd Number on the cover page first and in equal or larger type to that of the adopting or listing organization.General Informationii Individual and Branch Type Air Admittance Valves for Chemical Waste SystemsASSE Standard 1049 - 2009Individual and Branch Type Air Admittance Valves for Chemical Waste
6、Systems iiiASSE Standard 1049 - 2009This foreword shall not be considered a part of the standard, however, it is offered to provide background information.ASSE standards are developed in the interest of consumer safety.ASSE considers product performance standards to be of great value in the developm
7、ent of improved plumbing systems.This standard focuses on devices known as AAVCs. These devices are intended as an alternative to vents for individual fixtures and branches in the chemical waste systems only. The working group which developed this standard revision was set up within the framework of
8、 the Product Stan-dards Committee of the American Society of Sanitary Engineering.Recognition is made of the time volunteered by members of this working group and of the support of the manu-facturers who also participated in the meetings for this standard.This standard does not imply ASSEs endorseme
9、nt of a product which conforms to these requirements.Compliance with this standard does not imply acceptance by any code body.It is recommended that these devices be installed consistent with local codes by qualified and trained professionals.This standard was promulgated in accordance with procedur
10、es developed by the American National Standards Institute (ANSI).Forewordiv Individual and Branch Type Air Admittance Valves for Chemical Waste SystemsASSE Standard 1049 - 2009Edward J. LyczkoProduct Standards Committee ChairmanCleveland ClinicCleveland, OhioRand H. AckroydRand Technical Consulting,
11、 LLCNewburyport, MassachusettsWilliam Briggs, Jr.MGJ Associates New York, New YorkJudson W. CollinsJULYCO ProfessionalsMannford, OklahomaA. Richard EmmersonGeneral InterestBuffalo Grove, IllinoisRon GeorgeRon George Design they only allow air to enter the system. These devices are designed to be use
12、d for individual fixtures or for a horizontal branch serving multiple fixtures. When the devices are installed in a building, there shall be at least one (1) open vent terminal to relieve positive pressure which extends to the atmosphere outside of the building serving the same building drain on whi
13、ch these devices are installed. These devices shall not be installed in an area with a constant air pressure differential greater than 0.3 inches (7.6 mm) WC. 1.2 Scope1.2.1 DescriptionThese devices consist of a one-way valve designed to allow air to enter the plumbing drainage system when a pressur
14、e less than atmospheric develops. The device closes and seals by grav-ity under (0) differential pressure (static condition) and under positive pressure. These devices prevent sewer gases from entering the building. The device consists of a hooded or shielded body which contains a movable sealing as
15、sembly that seats and seals air flow when closed and allows air to enter when open.1.2.2 Temperature RangeThese devices shall function at temperatures from -40.0F to 212.0F (-40.0C to 100.0C).1.2.3 RatingThese devices shall be rated to pass the air rate indicated in Table 1 without exceeding a pres-
16、sure drop greater than 1.0 inch (25.4 mm) of water column.2 Individual and Branch Type Air Admittance Valves for Chemical Waste SystemsASSE Standard 1049 - 2009Table 1Drainage Pipe Size Maximum DFUsAirflow RateIPS DN CFM L/sinch mm1 32 1 1 0.471 40 3 1 0.472.0 50 6 2 0.943.0 75 20 4 1.884.0 100 160
17、8 3.761.3 Construction1.3.1 Air Inlet ShieldsAir inlets of the device shall be shielded to prevent inlet fouling. Air inlet shields shall extend down the body of the device, over the sealing membrane, to the lowest portion of the sealing membrane, and shall maintain a minimum of 1/16 inch (1.6 mm) c
18、learance between the inner lower edge of the shield and the lowest surface of the air opening of the sealing membrane.1.3.2 LeakageThe device and joining methods shall not permit air leakage when pressurized up to 30 inches (762.0 mm) water column.1.3.3 InterferenceThe end connection of the device s
19、hall be designed so that when installed the joint shall not interfere with any moving parts of the device or restrict air passageways.1.3.4 Connections1.3.4.1 Threads for AAVCsFor all plastic devices having taper pipe threads for connection to the drainage system, threads shall conform to the requir
20、ement of ASTM Specification F 1498. Metallic threads shall conform to the requirements of ASME B1.20.1.1.3.4.2 Hubless ConnectorsHubless connectors shall comply with ASTM C-564(3), CSA B602(4), or FM 168(5).1.3.4.3 Other ConnectionsWhere types of connections other than those specified in Sections 1.
21、3.4.1 and 1.3.4.2 are provided with the device, the connection shall meet the applicable material requirements and the total assembly shall comply with the performance tests in this standard.1.4 Reference StandardsReference to industry standards shall mean the latest edition.Individual and Branch Ty
22、pe Air Admittance Valves for Chemical Waste Systems 3ASSE Standard 1049 - 2009Section II2.0 Test Specimens2.1 Samples SubmittedThree (3) devices of each size and model shall be submitted by the manufacturer. Tests shall be performed in the order listed on one (1) device of each size submitted.2.2 Sa
23、mples TestedThe testing agency shall select one (1) of each type or model and size for full test.2.3 DrawingsAssembly drawings, installation drawings and other data needed to enable a testing agency to determine compliance with this standard shall accompany devices submitted for examination and perf
24、ormance testing.2.4 RejectionFailure of one (1) device shall be cause for rejection of that size or model.4 Individual and Branch Type Air Admittance Valves for Chemical Waste SystemsASSE Standard 1049 - 2009Section III3.0 Performance Requirements and Compliance TestingWhen a device is designed to a
25、ccommodate multiple pipe sizes, the device shall be installed on the largest nominal pipe size for which it is designed.3.1 Pressure Test of Complete Device3.1.1 PurposeThe purpose of this test is to determine if any pressure loss is evident during the pressure test.3.1.2 ProcedureThe device shall b
26、e mounted in its normal working (upright) position on a pipe having a length equal to ten (10) times its inside diameter. Installation shall be in accordance with manufactur-ers required installation instructions. The inlet shall be connected to an air supply capable of creating pressures from a inc
27、h (6.4 mm) water column (WC) up to 30.0 inches (762.0 mm) WC. Additionally, a secondary sealed system shall be constructed using the same pipe length and diameter as used for the device to compensate for changing environmental conditions. A pressure measuring device shall be part of the testing appa
28、ratus as shown in Figure 1. For the inch (6.4 mm) and inch (19.1 mm) WC pressure test, the pressure measuring device shall have a minimum precision of 0.01 inch (0.3 mm). For the 30 inch (762.0 mm) WC pressure test, the pressure measuring device shall have a minimum precision of 0.5 inch (12.7 mm).
29、The internal air volume of the control shall be equal to the internal air volume of the test device. The ambient temperature of the testing area shall remain constant within 2.0F ( 1.1C). The device shall be mounted in the test fixture at least two (2) hours prior to performing the test. Slowly appl
30、y pressure equal to inch (6.4 mm) water column. Close the shut-off valves for five (5) minutes and then slowly increase the pressure to inch (19.0 mm) water column. Close the shut-off valves, hold for five (5) minutes and then increase to 30.0 inches (762.0 mm) water column. Close the shut-off valve
31、s for five (5) minutes.Individual and Branch Type Air Admittance Valves for Chemical Waste Systems 5ASSE Standard 1049 - 2009Figure 1Pressure Measuring DevicePressuresourceHIPressureMeasuring DeviceControlDevice on TestLOW HI 3.1.3 CriteriaAny pressure loss in excess of 0.05 inches (1.27 mm) water c
32、olumn during the five (5) minute intervals for pressures of inch (6.4 mm) water column and inch (19.0 mm) water column shall result in a rejection of the device. Any pressure loss in excess of 2 inches (63.5 mm) water column during the five (5) minute interval for a pressure of 30.0 inches (762.0 mm
33、) water column shall result in a rejection of the device. 3.1.4 Repeat the test procedures in Section 3.1.2 with the device installed at a 15 orienta-tion from the vertical position. The test criteria in section 3.1.3 shall apply for the acceptability of the device to this test variation.3.2 Rating
34、and Opening Pressure Test3.2.1 PurposeThe purpose of this test is to simulate a constant negative pressure condition in a building, and to rate the device for capacity to serve as the inlet vent for a drain pipe of a specific size and fixture unit value. The rating shall establish the maximum fixtur
35、e unit value for specific drain pipe sizes.3.2.2 Procedures - Pre-conditioningInstallation shall be in accordance with manufacturers required installation instructions in ac-cordance with Figure 2. Activate the pressure source until the pressure reaches +1.0 inch (25.4 mm) water column and maintain
36、this pressure for twenty-four (24) consecutive hours. 3.2.3 ProcedureThe assembly shall have an airflow measuring device to measure the airflow rate in the piping and a pressure measuring device for measuring the pressure change in the piping system. The air flow measuring device shall be capable of
37、 measuring air flow velocity with a precision of 1 6 Individual and Branch Type Air Admittance Valves for Chemical Waste SystemsASSE Standard 1049 - 2009ft/min (304.8 mm/min). The pressure measuring device shall have a precision of 0.01 inch (0.3 mm) WC. The pressure measuring device shall be locate
38、d 4.0 inches (101.6 mm) below the device. There shall be a straight undisturbed pipe with a minimum length of ten (10) times the pipe diameter above the air flow meter and a straight undisturbed pipe with a minimum length of five (5) times the pipe diameter below the air flow meter. The fan shall be
39、 capable of creating a vacuum air flow within the capacity range of the device.Figure 210 times device diameter5 times device diameterAir flow measuring deviceAir fanDevice on Test100 mm (4”) minimumPressure transducerThe end of the pipe shall be temporarily capped to prevent airflow. Adjust the amo
40、unt of vacuum being applied with a variable control to a static vacuum of 0.3 inches (7.6 mm) WC. Turn off the vacuum. Remove the cap from the fixture and install the AAV to be tested; then start the vacuum at 0 inches (0 mm) uniformly increasing the vacuum over 15 seconds 2 seconds to 0.3 inches (7
41、.6 mm) WC until the device opens. Record the value of the pressure at the instant the device opens. This value shall be designated as the opening pressure. Increase the airflow rate until the pressure reaches -1.0 inch 0.05 inch (-25.4 mm 1.27 mm) WC. Record the air flow rate. This value shall be de
42、signated as the determined airflow capacity. The temperature shall be maintained during the test at 73.4F 3.6F (23.0C 2.0C).3.2.4 CriteriaA maximum opening pressure value of more than 0.3 inches (7.6 mm) water column shall result in a rejection of the device.3.2.5 Rating the DeviceTable 1 shall be u
43、sed to establish the drainage pipe size for the device based on the determined airflow capacity. 3.3 Endurance Test3.3.1 PurposeThe purpose of this test is to test the structural characteristics of the thermoplastics used in the manufacturing of the device. This is done by exposing the device to ext
44、reme temperatures and applying a mechanical load as it returns to a controlled temperature. When exposed to air Individual and Branch Type Air Admittance Valves for Chemical Waste Systems 7ASSE Standard 1049 - 2009temperature between -40.0F and 212.0F (40.0C and 100.0C), any material, whose charac-t
45、eristics are essential to the continued functioning of the device, shall not be adversely effected.3.3.2 Procedure - High TemperatureDevices shall be placed in an environment where the temperature is maintained at 212.0F 5.0F (100.0C 2.8C) for a period of eight (8) hours. After eight (8) hours, remo
46、ve the device and install it without delay on the test assembly in accordance with Figure 3. After the device is installed, immediately subject the device to a vacuum of 0 to 2.0 inches (0 to 50.8 mm) water column (in order to open the device) for two hundred fifty thousand (250,000) cycles. A cycle
47、 shall be defined as two (2) seconds open and four (4) seconds closed. During the cycle test, the device shall return to the laboratory controlled temperature of 73.4F 3.6F (23.0C 2.0C). Upon completion of this test, the device shall be retested to Section 3.1, Pressure Test of Complete Devices.Note
48、: When installing the device to the test assembly, the installation shall be in accordance with manufacturers required installation instructions for exposure to subfreezing or elevated temperatures.Figure 3Device on TestPressureTransducerShut-off Valve10 Times device diam.Air Flow3.3.3 Criteria for
49、High Temperature Failure to meet the criteria for Section 3.1, Pressure Test of Complete Device, after the two hundred fifty thousand (250,000) cycles shall result in a rejection of the device.3.3.4 Procedure - Low Temperature Upon completion of the high temperature test in Section 3.3.2, place the same device in an environment where the temperature is maintained at -40.0F 5.0F (-40.0C 2.8C). After eight (8) hours, remove the device and install it without delay on a test assembly in accordance with Figure 3. Af
