1、Stack Air Admittance Valves for Sanitary Drainage Systems 1ASSE Standard 1050 - 2009Performance Requirements forStack Air Admittance Valves for Sanitary Drainage SystemsAmerican Society of Sanitary EngineeringASSE Standard #1050-2009ASSE Board Approved: May, 2009 ANSI Approved: January, 2010An Ameri
2、can National StandardStack Air Admittance Valves for Sanitary Drainage Systems iASSE Standard 1050 - 2009American Society of Sanitary EngineeringWestlake, OhioCopyright 2009, 2002, 1990All rights reserved.Neither this standard, nor any portion thereof, may be reproduced without the written consent o
3、f the American Society of Sanitary Engineering.No product may be said to be ASSE approved unless the manufacturer has applied to the ASSE, has had his product tested according to the applicable ASSE standards, and when the product has passed the test, displays the ASSE Seal on the product.Instructio
4、ns for receiving the authorization to display the ASSE Seal are available from ASSEs International Office. Organizations wishing to adopt or list any ASSE standard should print the ASSE standard number on the cover page first and in equal or larger type to that of the adopting or listing organizatio
5、n.General Informationii Stack Air Admittance Valves for Sanitary Drainage SystemsASSE Standard 1050 - 2009Stack Air Admittance Valves for Sanitary Drainage Systems iiiASSE Standard 1050 - 2009This foreword shall not be considered a part of the standard, however, it is offered to provide background i
6、nformation.ASSE standards are developed in the interest of consumer safety.ASSE considers product performance standards to be of great value in the development of improved plumbing systems.AAVs open to the atmosphere when a negative pressure is created within the stack by flow of waste water, and ar
7、e installed at the top of stacks to relieve the negative pressures in the DWV system. An AAV is a one-way valve designed to allow air to enter the plumbing drain-age system when a negative pressure develops in the piping. The device shall be closed at zero differential pressure and under conditions
8、of positive internal pressure.See ASSE Standard #1051-year for the performance requirements for Fixture and Branch Type Air Admittance Valves for Sanitary Drainage Systems.The working group which developed this standard revision, was set up within the framework of the Product Standards Committee of
9、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 manufacturers who also participated in the meetings for this standard.This standard does not imply ASSEs endorsement of a product which conforms to thes
10、e 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 procedures developed by the American National
11、Standards Institute (ANSI).Forewordiv Stack Air Admittance Valves for Sanitary Drainage SystemsASSE Standard 1050 - 2009Stack Air Admittance Valves for Sanitary Drainage Systems vASSE Standard 1050 - 2009Edward J. LyczkoProduct Standards Committee ChairmanCleveland ClinicCleveland, OhioRand H. Ackro
12、ydRand Technical Consulting, 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 de
13、vices are designed to be installed on stacks where branches on multiple floors are connected. When these 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 building d
14、rain on which these devices are installed. 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 pressure less than atmospheric develops. The device closes and seals by gravity under zero (0) differential pressure (stati
15、c condition) and under positive pressure. These devices prevent sewer gases from entering a building. The device consists of a hooded or shielded body which contains a movable sealing assembly which seats and seals air flow when closed and allows air to enter when open. 1.2.2 Temperature RangeThese
16、devices shall function at temperatures from -40.0F to 150.0F (-40.0C to 65.6C).1.2.3 RatingThese devices shall, at a minimum, pass the required volume of air according to Table 1 at -1.0 inch (-25.4 mm) water column.Table 1Stack AAV Capacity Requirements at 1.0 Inch (25.4 mm) of WaterDrainage Stack
17、Pipe SizeMinimum Airflow Requirement Maximum DFUsIPS inchesDN mm CFM L/s Total for stack of 3 branch intervals or lessTotal for stack greater than 3 branch intervals1 40 4.0 1.9 4 82 50 8.0 3.8 10 242 65 12.0 5.7 20 423.0 75 23.0 10.9 48 724.0 100 47.0 22.2 240 5002 Stack Air Admittance Valves for S
18、anitary Drainage SystemsASSE Standard 1050 - 20091.3 Construction 1.3.1 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 shal
19、l maintain a minimum of 1/16 inch (1.6 mm) clearance 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 30.0 inches (762.0 mm) water column.1.3.3
20、InterferenceThe end connection of the device shall 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 Air Admittance ValvesFor all plastic devices having taper pipe threads for connect
21、ion to the drainage system, threads shall conform to the requirement of ASTM Specification F 1498. Metallic threads shall conform to the requirements of ASME B1.20.1.1.3.4.2 Hubless Connectors Hubless connectors shall comply with ASTM C-564, CSA B602, or FM 1680.1.3.4.3 Dimensions and Tolerances for
22、 AAV SocketsSockets on the device shall conform to applicable material requirements. Devices having sock-ets made from ABS material shall conform to the requirements of ASTM Specification D 2661, with the exception of wall thickness. Devices having sockets and made from PVC material shall conform to
23、 the requirements of ASTM Specification D 2665, with the exception of wall thickness. 1.3.4.4 Other ConnectionsWhere types of connections other than connections specified in Sections 1.3.4.1, 1.3.4.2, and 1.3.4.3 are provided with the device, the connection shall conform to the applicable material r
24、equirements and the total assembly shall comply with the performance tests in this standard.1.4 Reference StandardsReferences to industry standards shall mean the latest edition.Stack Air Admittance Valves for Sanitary Drainage Systems 3ASSE Standard 1050 - 2009Section II 2.0 Test Specimens2.1 Sampl
25、es 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 Samples TestedThe testing agency shall select one (1) of each type or model and size for full test.2.3 DrawingsAssemb
26、ly drawings, installation drawings and other data which are needed to enable a test-ing agency to determine compliance with this standard shall accompany devices submitted for examination and performance testing.2.4 RejectionFailure of one (1) device shall be cause for rejection of that size or mode
27、l.4 Stack Air Admittance Valves for Sanitary Drainage SystemsASSE Standard 1050 - 2009Section III3.0 Performance Requirements and Compliance TestingWhen a device is designed to accommodate multiple pipe sizes, the device shall be installed on the largest nominal pipe size for which it is designed.3.
28、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 be mounted in its normal working position on a pipe having a length equal to 8 feet (2.4m). Installation shall be in accord
29、ance with the manufacturers required installation instructions. The inlet shall be connected to an air supply capable of creating pressures from a inch (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
30、and diameter as used for the device under test to compensate for changing environmental conditions. A pressure measuring device shall be part of the test apparatus 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 prec
31、ision 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). 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 leas
32、t two (2) hours prior to performing the test. Slowly apply 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 (19.1 mm) water column. Close the shut-off valves; hold for five (5) minutes, and then increase the p
33、ressure to 30.0 inches (762.0 mm) water column. Close the shut-off valves for five (5) minutes.Stack Air Admittance Valves for Sanitary Drainage Systems 5ASSE Standard 1050 - 2009Figure 1 Pressure Measuring DevicePressure sourceHIPressureMeasuring DeviceControlDeviceon TestLOW HI 3.1.3 CriteriaAny p
34、ressure loss during the five (5) minute intervals for pressures of inch (6.4 mm) water column and inch (19.0 mm) water column in excess of 0.05 inches (1.27 mm) water column shall result in a rejection of the device. Any pressure loss during the five (5) minute interval for a pressure of 30.0 inches
35、 (762.0 mm) water column in excess of 2 inches (63.5 mm) 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 acceptab
36、ility of the device to this test variation.3.2 Rating and Opening Pressure Test3.2.1 PurposeThe purpose of this test is to simulate a constant negative pressure condition in a buildings drainage system, and to rate the device for capacity to serve as the inlet vent for a drain pipe of a specific siz
37、e and fixture unit value. The rating shall establish the maximum fixture unit value for specific drain pipe sizes.3.2.2 Procedure - Pre-conditioningInstallation shall be in accordance with manufacturers required installation instructions in ac-cordance with Figure 2. Activate the pressure source unt
38、il the pressure reaches +1.0 inch (25.4 mm) water column and maintain 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 i
39、n the piping system. The air flow measuring device shall be capable of measuring air flow velocity with an precision of 1 ft/min (304.8 6 Stack Air Admittance Valves for Sanitary Drainage SystemsASSE Standard 1050 - 2009mm/min). The pressure measuring device shall have an precision of 0.01 inch (0.3
40、 mm) WC. The pressure measuring device shall be located 4.0 inches (101.6 mm) below the device. There shall be a minimum length of ten (10) times the pipe diameter straight undisturbed pipe above the air flow meter and a minimum length of five (5) times the pipe diameter straight undisturbed pipe be
41、low the air flow meter. The fan shall be capable of creating a vacuum air flow within the capacity range of the device.Figure 210 times the pipe diameter5 times the pipe diameterAir flow measuring deviceVacuum/Pressure sourceDevice on Test4.0 0.5 inches (101.6 12.7 mm) minimumPressure transducerTop
42、of the adapter on hard pipeThe end of the pipe shall be temporarily capped to prevent airflow. Adjust the amount 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 s
43、tart the vacuum at 0 inches (0 mm) uniformly increasing the vacuum over 15 seconds 2 seconds to 0.3 inches (7.6 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
44、 pressure reaches -1.0 inch 0.05 inch (-25.4 mm 1.27 mm) WC. Record the air flow rate. This value shall be designated 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 inc
45、hes (7.6 mm) water column shall result in a rejection of the device.3.2.5 Rating the DeviceTable 1 shall be used to establish the drainage pipe size for the device based on the determined airflow capacity. Note: The air flow rates are based on the maximum air flow determined by Dawson and Kalinske u
46、sing a stack having a water flow of 7/24 diameter and an air flow of 17/24 diameter.3.3 Endurance Test3.3.1 PurposeThe purpose of this test is to test the structural characteristics of the thermoplastics used in Stack Air Admittance Valves for Sanitary Drainage Systems 7ASSE Standard 1050 - 2009the
47、manufacturing of the device by exposing the device to extreme temperatures and apply a mechanical load as it returns to a controlled temperature. When exposed to air temperature between - 40.0F and 150.0F (- 40.0C and 65.6C), any material, whose characteristic is es-sential to the continued function
48、ing of the device, shall not be adversely effected. 3.3.2 Procedure - High TemperaturePlace the device in an environment where the temperature is maintained at 150.0F 5.0F (65.6C 2.8C) for a period of eight (8) hours. After eight (8) hours, remove the device, and immediately install the device on th
49、e 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 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, Pre
