1、NSF International Standard / American National StandardNSF/ANSI 222 - 2006e(reaffirmed 2011) Ozone GeneratorsNSF International, an independent, not-for-profit, non-governmental organization, is dedicated to being the leading global provider of public health and safety-based risk management solutions
2、 while serving the interests of all stakeholders. This Standard is subject to revision. Contact NSF to confirm this revision is current. Users of this Standard may request clarifications and interpretations, or propose revisions by contacting: Chair, Recreational Water Facilities NSF International 7
3、89 North Dixboro Road, P.O. Box 130140 Ann Arbor, Michigan 48113-0140 USA Phone: (734) 769-8010 Telex: 753215 NSF INTL FAX: (734) 769-0109 E-mail: infonsf.org Web: http:/www.nsf.org i NSF International Standard/ American National Standard Equipment for Swimming Pools, Spas, Hot Tubs and other Recrea
4、tional Water Facilities Ozone generators Standard Developer NSF International Designated as an ANSI Standard September 27, 2006 (Reaffirmed August 22, 2011) American National Standards Institute ii Prepared by The NSF Joint Committee on Recreational Water Facilities Recommended for Adoption by The N
5、SF Council of Public Health Consultants Adopted by NSF International May 2006 Revised September 2006 Reaffirmed August 2011 Published by NSF International PO Box 130140, Ann Arbor, Michigan 48113-0140, USA For ordering copies or for making inquiries with regard to this Standard, please reference the
6、 designation “NSF/ANSI 222 06e (r 2011).” Copyright 2011 NSF International Previous editions 2006 Unless otherwise specified, no part of this publication may be reproduced or utilized in any form or by any means, electronic or mechanical, including photocopying and microfilm, without permission in w
7、riting from NSF International. Printed in the United States of America. iii Disclaimers1NSF, in performing its functions in accordance with its objectives, does not assume or undertake to discharge any responsibility of the manufacturer or any other party. The opinions and findings of NSF represent
8、its professional judgment. NSF shall not be responsible to anyone for the use of or reliance upon this Standard by anyone. NSF shall not incur any obligation or liability for damages, including consequential damages, arising out of or in connection with the use, interpretation of, or reliance upon t
9、his Standard. NSF Standards provide basic criteria to promote sanitation and protection of the public health. Provisions for mechanical and electrical safety have not been included in this Standard because governmental agencies or other national standards-setting organizations provide safety require
10、ments. Participation in NSF Standards development activities by regulatory agency representatives (federal, local, state) shall not constitute their agencys endorsement of NSF or any of its Standards. Preference is given to the use of performance criteria measurable by examination or testing in NSF
11、Standards development when such performance criteria may reasonably be used in lieu of design, materials, or construction criteria. The illustrations, if provided, are intended to assist in understanding their adjacent standard requirements. However, the illustrations may not include all requirement
12、s for a specific product or unit, nor do they show the only method of fabricating such arrangements. Such partial drawings shall not be used to justify improper or incomplete design and construction. Unless otherwise referenced, the annexes are not considered an integral part of NSF Standards. The a
13、nnexes are provided as general guidelines to the manufacturer, regulatory agency, user, or certifying organization. 1 The information contained in this Disclaimer is not part of this American National Standard (ANS) and has not been processed in accordance with ANSIs requirements for an ANS. As such
14、, this Disclaimer may contain material that has not been subjected to public review or a consensus process. In addition, it does not contain requirements necessary for conformance to the Standard. iv This page is intentionally left blank. v Contents 1 General 1 1.1 Purpose 1 1.2 Scope 1 1.3 Alternat
15、e material, design, and construction 1 2 Normative references . 1 3 Definitions 2 4 Materials 3 4.1 Compatible materials for operation 3 5 Design and construction . 5 5.1 Hazards 5 5.2 Electrical safety and operation . 5 5.3 Structural integrity 5 6 Ozone concentration, output rate, and testing stan
16、dard and conditions 5 6.1 Performance claims . 5 6.2 Analytical equipment / test setup: 6 6.3 General test conditions and methods 6 6.4 Ozone production test 7 7 Instructions and information . 9 7.1 Installation, operation, and maintenance instructions 9 7.2 Data plate . 10 7.3 Performance data shee
17、t . 10 Annex A A1 Table A1 Ozone in dry air A1 Table A2 Ozone in oxygen A1 Figure A1 . A2 Table A3 Example format 1 for Performance Data Sheet . A3 Table A4 Example format 2 for Performance Data Sheet . A3 Table A5 Example format 3 for Performance Data Sheet A4 Figure A2 A5 Figure A3 A5 Table A6 Exa
18、mple format 4 for Performance Data Sheet . A6 vi This page is intentionally left blank.vii Foreword2The purpose of this Standard is to provide a method to evaluate ozone generator production performance (i.e., ozone concentration and output rate) and establish minimum requirements for ozone generato
19、r materials and design and construction. This standard specifies the minimum requirements for product literature and labeling information that a manufacturer shall supply to authorized representatives and owners. This edition of the Standard is a reaffirmation of NSF/ANSI 222 2006e, and contains no
20、new material. This Standard was developed by the NSF Joint Committee on Recreational Water Facilities using the consensus process described by the American National Standards Institute. Suggestions for improvement of this Standard are welcome. Comments should be sent to Chair, Recreational Water Fac
21、ilities at standardsnsf.org, or c/o NSF International, Standards Department, PO Box 130140, Ann Arbor, Michigan 48113-0140, USA. 2The information contained in this Foreword is not part of this American National Standard (ANS) and has not been processed in accordance with ANSIs requirements for an AN
22、S. As such, this Foreword may contain material that has not been subjected to public review or a consensus process. In addition, it does not contain requirements necessary for conformance to the Standard. viii This page is intentionally left blank.1 2011 NSF NSF/ANSI 222 2006e (r 2011) NSF Internati
23、onal Standard for Equipment for Swimming Pools, Spas, Hot Tubs and other Recreational Water Facilities Ozone Generators 1 General 1.1 Purpose The purpose of this standard is to provide a method to evaluate ozone generator production performance (i.e., ozone concentration and output rate) and to esta
24、blish minimum requirements for ozone generator materials and design and construction. This standard specifies the minimum requirements for product literature and labeling information that a manufacturer shall supply to authorized representatives and owners. 1.2 Scope The objective of this standard i
25、s to provide a method to determine ozone generator production performance for water applications. This standard covers ozone generators that produce up to 500 g/h (26.4 lbs/d) of ozone. Devices utilizing actual mixing of the gas produced with water to be treated shall be precluded from this standard
26、. This Standard does not cover evaluating the effectiveness of an ozone generator for the treatment for water; it also does not cover structural integrity for ozone systems. 1.3 Alternate material, design, and construction While specific material, design, and construction may be stipulated in this s
27、tandard, systems that incorporate alternate material, designs, and construction may be acceptable when it is verified that such systems meet the applicable requirements. 2 Normative references The following documents contain provisions that by reference in this text constitute requirements of this s
28、tandard. At the time of publication, the indicated editions were valid. All of the documents are subject to revision, and parties are encouraged to investigate the possibility of applying the recent editions of these documents. ASTM D4000, Standard Classification System for Specifying Plastic Materi
29、als3 3 American Society for Testing Materials (ASTM) 100 Barr Harbor Drive, West Conshohocken, PA 19428 . 2011 NSF NSF/ANSI 222 2006e (r 2011) 2 EPA Requirements for Ozone, Reference: Page 27 of Ozone News, Volume 29,No. 5, October 20014 3 Definitions 3.1 concentration: The amount of ozone in the ga
30、s stream leaving the generator. Concentration can be reported in weight percent, g/m3, volume percent, ppm by weight, ppm by volume, and the milligrams of ozone per liter of gas produced. Annex A gives conversion factors at one atmosphere standard pressure at 20 C (68 F). Under this standard, concen
31、tration will be reported by weight percent and g/m3.3.2 coolant flow rate: The flow rate of the coolant used to remove heat from the reaction chamber(s) of the ozone generator. NOTE The critical factor for heat removal is the mass flow rate (kg/hr) of the coolant. The mass flow rate of the coolant i
32、s equal to the volumetric flow rate (m3/hr, ft3/hr) of the coolant times the density (Kg/m3, lb/ft3) of the coolant. For liquid cooled systems the density of the coolant (liquid) is virtually independent of temperature and pressure and can be specified as the volumetric flow rate of the cooling liqu
33、id (m3/hr, ft3/hr, gpm, Lpm.) For gas cooled systems the density (and therefore the mass flow rate) of the coolant gas is dependent on temperature and pressure. For this standard, the pressure and temperature ranges are small. The volumetric flow rate (m3/hr, ft3/hr, lpm, ft3/min, CFM) of the coolan
34、t shall be specified. As a practical approximation of the mass flow rate. 3.3 dew point (dew-point temperature): The temperature to which air must be cooled to reach vapor saturation (assuming air pressure and moisture content are constant). For Corona Discharge ozone generation the minimum dew poin
35、t is 60 C (76 F). 3.4 feed gas: The gas (ambient air, dry air or oxygen) delivered to the inlet side of the ozone generator. The required quality and feed gas flow rate is determined by the manufacturer. 3.5 feed gas flow rate: The flow rate of the feed gas through the reaction chamber(s) of the ozo
36、ne generator. NOTE The critical factor for the reaction is the mass flow rate ( kg/hr) of the feed gas. The mass flow rate is the volumetric flow rate (m3/hr, ft3/hr) of the feed gas times the density (kg/m3, lb/ft3) of the feed gas. The density of a gas is dependent on the temperature and pressure.
37、 Because of the continuous variability of the parameters affecting density and volumetric flow rate in a ozone generator, there is no practical method to determine the true mass flow rate of the feed gas. For this standard, due to the small range of pressure and temperature, the volumetric flow rate
38、 will be specified as an approximation of the mass flow rate. For pressurized systems, the manufacturer shall specify the volumetric flow rate and the gauge pressure of the feed gas at the inlet to the ozone generator. 3.6 generator cell pressure: The gauge pressure of the feed gas in the reaction c
39、hamber(s). 3.7 ozone generator: A device that when supplied with an oxygen containing gas and power, produces an ozone-containing gas. Said ozone generator includes any controls, transformers and frequency generators required to convert a standard electrical supply (as specified) to the electrical c
40、haracteristics required to operate the generator cell properly. 3.8 packaged ozone system: An ozone generator packaged with a gas preparation system, typically on a single skid or otherwise a single unit. 4 International Ozone Association P. O. Box 28873, Scottsdale, AZ 85255 . 2011 NSF NSF/ANSI 222
41、 2006e (r 2011) 3 3.9 output rate: The mass of ozone produced by an ozone generator in weight per unit time (g/hr, lb/hr). Output rate is the mass of ozone per volume of product gas (g/m3, lb/ft3) multiplied by the feed gas flow rate (m3/hr, lpm, ft3/hr, CFM). 3.10 relative humidity: The ratio, in p
42、ercent, of the actual amount of water vapor in a body of air in relation to the maximum amount that the body can hold at a given temperature. Relative humidity varies with temperature for a given amount of water vapor. 3.11 Short cycle or batch system: Systems that are not designed to operate for mo
43、re than 5 min at a time. 4 Materials Materials in direct contact with ozone shall be resistant to degradation by ozone at the ozone concentration specified by the manufacturer. 4.1 Compatible materials for operation Tables 4.1.1 and 4.1.2 provide examples of ozone-resistant materials that are commer
44、cially available. These materials are recommended for use with dry gas with a maximum temperature of 40 C (104 F) Alternate materials may be used for ozone generators if material compatibility is demonstrated. The material supplier shall provide documentation of compatibility. NOTE For use of altern
45、ate materials, at a minimum the supplier shall confirm compatibility with end use. Other materials may be used for construction of ozone generators if proper material compatibility is demonstrated. Acceptable documentation shall include component material manufacturers compatability charts or writte
46、n warranty statement. 2011 NSF NSF/ANSI 222 2006e (r 2011) 4 4.1.1 Components and piping NOTE Abbreviations for components, piping, gaskets P1= Standard atmospheric pressure, 14.7 psi; P2= Actual pressure, 14.7 + pressure in psi inside the flowmeter; T1 = Standard temperature, 293 K (20 C + 273 in d
47、egrees Kelvin); and T2= Observed temperature in degree Kelvin (measured temperature in degrees Celsius + 273 K) Example Measured feed gas flow test conditions are 10 scfh at 10 psig and 25 C. Calculated actual gas flow is 10 cfh x (24.7/14.7) 1/2x (298/293) = 13.18 scfh 6.2.4 Coolant flow meters For
48、 liquid cooled ozone generators, the coolant flow rate shall be measured during the test. The flow meter(s) shall be accurate within 5% at the measured flow rate. For gas-cooled ozone generators, the coolant flow rate shall be the volumetric flow rate of the system fans as provided by the manufactur
49、er. 2011 NSF NSF/ANSI 222 2006e (r 2011) 7 6.3 General test conditions and methods 6.3.1 Temperature conditions ambient air temperature 22 2 C (72 5 F) cooling water temperature 22 2 C (72 5 F) cooling air temperature 22 2 C (72 5 F) 6.3.2 Gas preparation equipment The feed gas for a packaged ozone generator shall be the output of the packaged gas preparation equipment. The feed gas dew point and oxygen concentration shall be measured and reported. The input gas to the gas preparation equipme
