ASSE-1020-1998.pdf
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1、ASSE Standard #lo20 ASSE Board Approved: 1998 American Society of Sanitary Engineering Performance Requirements for Pressure Vacuum Breaker Assembly Copyright American Society of Sanitary Engineering Provided by IHS under license with ASSE Licensee=University of Texas/5626000001 Not for Resale, 12/2
2、4/2006 00:27:34 MSTNo reproduction or networking permitted without license from IHS -,-,- General Information Neither this standard, nor any portion thereof, may be reproduced without the written consent of the American Society of Sanitary Engineering. No product may be said to be ASSE approved unle
3、ss 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. Instructions for receiving the authorization to display the Seal are available from ASSE Central Office.
4、 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 organization. American Society of Sanitary Engineering Westlake, Ohio Copyright 1998, 1990, 1989,1982, 1981,1976,1974
5、 All rights reserved. Pressure Vacuum Breaker Assembly i ASSE #lo20 - Revised: 1998 Copyright American Society of Sanitary Engineering Provided by IHS under license with ASSE Licensee=University of Texas/5626000001 Not for Resale, 12/24/2006 00:27:34 MSTNo reproduction or networking permitted withou
6、t license from IHS -,-,- Pressure Vacuum Breaker Assembly ASSE #lo20 - Revised: 1998 Copyright American Society of Sanitary Engineering Provided by IHS under license with ASSE Licensee=University of Texas/5626000001 Not for Resale, 12/24/2006 00:27:34 MSTNo reproduction or networking permitted witho
7、ut license from IHS -,-,- Foreword This Standard was approved by the Standards Committee to extend the A.S.S.E. portfolio of standards for back pressure and back-siphonage backflow prevention devices for pipe applied vacuum breakers. For pipe applied service conditions in water supply lines, there a
8、re two recognized basic conditions for which vacuum breakers, anti-siphon type, are needed. These two classifica- tions are atmospheric and pressure type. In one instance the device is under pressure only when there is a demand for water in the equipment being served. The atmospheric type of device
9、is adequate when the service line is under pressure only for short periods of time. For the service conditions where the pressure in the service line must be continuous, a vacuum breaker must be constructed with built-in means to mechanically force the atmo- spheric Air Inlet Valve to open should a
10、negative pressure (vacuum) be created in the supply line. For this class of service, a “pressure type“ device is considered essential. This Standard # I 020 was originally titled Vacuum Breakers, Anti-Siphon, Pressure Type, and was approved by the Standards Committee of the American Society of Sanit
11、ary Engi- neering, received the concurrence of the A.S.S.E. Board of Directors and was issued as an official A.S.S.E. Standard in November, 1974. During its revision in 1989, the title was changed to Pressure Vacuum Breaker Assembly. This change also included a recommendation for outdoor usage of th
12、e assembly. The draft of this Standard was presented to the A.S.S.E. Product Standards Committee during their regular meeting in 1989. The Committee acted to recommend adoption of this Standard to the A.S.S.E. Board of Directors, and the Board approved the standard to become effective January 1990.
13、Pressure Vacuum Breaker Assembly ASSE #I020 - Revised: 1998 ill Copyright American Society of Sanitary Engineering Provided by IHS under license with ASSE Licensee=University of Texas/5626000001 Not for Resale, 12/24/2006 00:27:34 MSTNo reproduction or networking permitted without license from IHS -
14、,-,- 1997-98 ASSE Product Standards Committee Richard J. Prospal Standards Committee Chairman Reliance Mechanical, Cleveland, Ohio Rand H. Ackroyd Rand Engineering, Newburyport, Massachusetts Michael Beckwith Sidney Cavanaugh State of Wisconsin - Division of Safety and Buildings, Madison, Wisconsin
15、The United Association of Journeymen and Apprentices of the Plumbing and Pipefitting Industry of the United States and Canada, Washington, D. C. Shannon M. Corcoran ASSE Standards Coordinator A. Richard Emmerson Chicago Faucet Company, Des Plaines, Illinois Dale Holloway Solomon KO SGS United States
16、 Testing Company, Tulsa, Oklahoma Canadian Standards Association, Etobicoke, Ontario, Canada Michael Kobel International Association of Plumbing and Mechanical Officials, Walnut, California Valentine Lehr, P.E. Lehr Associates, New York, New York Herbert Panzer, P.E. S ha b bi r Rawa I pi nd iwala H
17、erbert Panzer, PE, Consulting Engineer, Plainview, New York Kohler Company, Kohler, Wisconsin David Viola Building Oficials and Code Administrators, Inc. , Country Club Hills, Illinois Joseph C. Zaffuto, P.E. ASSE Staff Engineer, Westlake, Ohio Pressure Vacuum Breaker Assembly ASSE #lo20 - Revised:
18、1998 Copyright American Society of Sanitary Engineering Provided by IHS under license with ASSE Licensee=University of Texas/5626000001 Not for Resale, 12/24/2006 00:27:34 MSTNo reproduction or networking permitted without license from IHS -,-,- ASSE Standard #IO20 Working Group Rand Ackroyd, Chairm
19、an Rand Engineering, Neewburyport, Massachusetts Mark Anderson The Ford Meter Box Co., Inc., Wabash, Indiana Thomas E. (Ted) Archibald Grinnell Corporation, Cranston, Rhode Island Patrick Ahearn Conbraco Industries, Matthews, North Carolina Mark Clark NIBCO, Elkhart, Indiana Gunnar Collins CB SI, Pa
20、la tine, Illinois Bill Dunmire CMB Industries, Inc., Fresno, California Les Engelmann Ames Co., Woodlane, California Frank C. Evans Zin-Plas Corp., Grand Rapids, Michigan Scott Farnham The Ford Meter Box Co., Inc., Wabash, Indiana Patrick J. Higgins P. J. Higgins c. Back Siphonage (See ASSE Standard
21、 #I 056); and d. Pressure Type (See ASSE #1058). 1.2.2 Size Range The assembly shall be designed to accommodate nominal pipe sizes 15 to 50 mm (1/2“ to 2“ inches). 1.2.3 Working Pressure Range Assemblies shall be designed for a minimum rated working pressure of at least 1034 kPa (150 psi.). 1.2.4 Te
22、mperature Range a. Cold water service shall range from 0.55 “C to 43 “C (33 O F to 110 OF). b. Hot water service shall range from 0.55 “C to 82.2 O C (33 “F to 180 OF) minimum. 1.3.1 Check Valve The check valves shall be force loaded (biased) to a normally closed position under static conditions. Pr
23、essure Vacuum Breaker Assembly 1 ASSE #lo20 - Revised: 1998 Copyright American Society of Sanitary Engineering Provided by IHS under license with ASSE Licensee=University of Texas/5626000001 Not for Resale, 12/24/2006 00:27:34 MSTNo reproduction or networking permitted without license from IHS -,-,-
24、 1.3.2 Air Inlet Valve a. The air inlet valve shall be force loaded (biased) to a normally open position when the line pressure is atmospheric. It shall be so located above the pipe line that water can drain from it by gravity. b. The air inlet valve shall start to open when the line pressure reache
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