1、NSF International Standard / American National StandardNSF/ANSI 37 - 2017 Air Curtain for Entranceways forFood and Food Service EstablishementsNSF International, an independent, not-for-profit, non-governmental organization, is dedicated to being the leading global provider of public health and safe
2、ty-based risk management solutions 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, Joint Committee
3、 on Food Equipment c/o NSF International 789 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.orgi NSF/ANSI 37 2017 NSF International Standard/ American National Standard for
4、 Food Equipment Air curtains for entranceways in food and food service establishments Standard Developer NSF International NSF International Designated as an ANS Standard June 1, 2017 American National Standards Instituteii Prepared by The NSF Joint Committee on Food Equipment Recommended for Adopti
5、on by The NSF Council of Public Health Consultants Adopted by The NSF Board of Directors July 1970 Reaffirmed July 1980 Reaffirmed July 1985 Revised November 1992 Revised March 2002 Revised July 2005 Revised April 2007 Revised April 2009 Revised August 2012 Revised July 2017 Published by NSF Interna
6、tional PO Box 130140, Ann Arbor, Michigan 48113-0140, USA For ordering copies or for making inquiries with regard to this Standard, please reference the designation “NSF/ANSI 37 2017.” Copyright 2017 NSF International Previous editions 2012, 2009, 2007, 2005, 2002, 1992, 1985, 1980, 1970 Unless othe
7、rwise 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 writing from NSF International. Printed in the United States of America.iii Disclaimers1 NSF, in performing it
8、s 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 its professional judgment. NSF shall not be responsible to anyone for the use of or reliance upon this Standa
9、rd 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 this Standard. NSF Standards provide basic criteria to promote sanitation and protection of the public health.
10、 Provisions for mechanical and electrical safety have not been included in this Standard because governmental agencies or other national standards-setting organizations provide safety requirements. Participation in NSF Standards development activities by regulatory agency representatives (federal, l
11、ocal, 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 Standards development when such performance criteria may reasonably be used in lieu of design, materials, or
12、construction criteria. The illustrations, if provided, are intended to assist in understanding their adjacent standard requirements. However, the illustrations may not include all requirements for a specific product or unit, nor do they show the only method of fabricating such arrangements. Such par
13、tial 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 annexes are provided as general guidelines to the manufacturer, regulatory agency, user, or certifying organiz
14、ation. 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. Therefore, this Disclaimer may contain material that has not been subjected to public review or a consensus process.
15、 In addition, it does not contain requirements necessary for conformance to the Standard. This page is intentionally left blank. v Contents 1 General . 1 1.1 Purpose 1 1.2 Scope . 1 1.3 Alternative materials, design, and construction 1 1.4 Measurement . 1 2 Normative references . 1 3 Definitions . 2
16、 4 Materials . 2 4.1 Corrosion resistance 2 4.2 Smoothness and cleanability 3 4.3 Coatings . 3 4.4 Gaskets 3 5 Design and construction . 3 5.1 General design and construction requirements . 3 5.2 Specific equipment design and construction 4 6 Performance . 5 6.1 Service window air curtains 5 6.2 Cus
17、tomer entry air curtains 6 6.3 Service entry air curtains 8 6.4 Automatic activation air curtain test . 9 7 Labeling 13 Annex A Recommendations for installation 15 Annex B Food Equipment Joint Committee 17 This page is intentionally left blank.vii Foreword2 The purpose of this Standard is to establi
18、sh minimum public health and sanitation requirements for the materials, design, construction, and performance of air curtains for entranceways in food and food service establishments. This Standard uses inch-pound units as the primary units with equivalent decimal and SI (metric) conversions provide
19、d in parentheses. The Joint Committee carried a motion that this convention be adopted in future revisions to this Standard. Issue 6 Additions and revisions to sections three (definitions) and six (performance) were made. This Standard was developed by the NSF Joint Committee on Food Equipment using
20、 the consensus process described by the American National Standards Institute. Suggestions for improvement of this Standard are welcome. This Standard is maintained on a Continuous Maintenance schedule and can be opened for comment at any time. Comments should be sent to Chair, Joint Committee on Fo
21、od Equipment at standardsnsf.org, or c/o NSF International, Standards Department, P.O. Box 130140, Ann Arbor, Michigan, 48113-0140, USA. 2 The information contained in this Foreword is not part of this American National Standard (ANS) and has not been processed in accordance with ANSIs requirements
22、for an ANS. Therefore, 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. This page is intentionally left blank.1 2017 NSF NSF/ANSI 37 2017 NSF/ANSI Internati
23、onal Standard for Food Equipment Air curtains for entranceways in food and food service establishments 1 General 1.1 Purpose This Standard establishes minimum sanitation and performance requirements for the materials, design, construction, and performance of air curtains and their related components
24、. 1.2 Scope Equipment covered by this Standard includes, but is not limited to, air curtains for entranceways in food and food service establishments (e.g., service and customer entries, service windows, cooler and cold storage entries). Housing, air moving equipment, air directional regulating devi
25、ces, and other appurtenances to the air curtain are included. This Standard does not establish equipment installation requirements. While the requirements of this Standard are intended to ensure that equipment may be installed in a sanitary manner, proper installation of equipment shall be governed
26、by the applicable codes. Equipment components and materials covered under other NSF or NSF/ANSI Standards or Criteria shall also comply with the requirements therein. This Standard is not intended to restrict new unit design, provided that such design meets the minimum specifications described herei
27、n. 1.3 Alternative materials, design, and construction While specific materials, design, and construction may be stipulated in this Standard, equipment that incorporates alternate materials, design, or construction may be acceptable when such equipment meets the applicable requirements herein. 1.4 M
28、easurement Decimal and SI conversions provided parenthetically shall be considered equivalent. Metric conversions and significant figure rounding have been made according to IEEE/ASTM SI 10. 2 Normative references The following documents contain provisions that, through reference, constitute provisi
29、ons of this NSF/ANSI Standard. At the time this Standard was balloted, the editions listed below were valid. All documents are subject to revision, and parties are encouraged to investigate the possibility of applying the recent editions of the documents indicated below. The most recent published ed
30、ition of the document shall be used for undated references. 2017 NSF NSF/ANSI 37 2017 2 IEEE/ASTM SI 10 2010. American National Standard for Metric Practice3 NSF/ANSI 51. Food equipment materials NSF/ANSI 170. Glossary of food equipment terminology IEST-RP-CC013, Institute of Environmental Sciences
31、Recommended Practice4 3 Definitions 3.1 air curtain: A device that delivers a vertical stream of air across an opening for the purpose of keeping tempered air from moving out of the building and insects from moving into the building. 3.2 air curtain protected openings: 3.2.1 customer entry: Exterior
32、 passage for entrance into an establishment primarily intended for customers 3.2.2 service entry: an exterior passage for entrance into an establishment primarily intended for employees and the delivery of supplies. 3.2.3 service window: an exterior opening in the wall of an establishment primarily
33、intended to pass finished goods to customers. 3.3 airstream: The directed flow of air generated by an air curtain assembly. 3.4 airstream discharge nozzle: The slot from which the airstream exits the air curtain assembly. 3.5 maximum effective airstream height: Manufacturer specified value indicatin
34、g the maximum height of the airstream in compliance with the applicable performance test protocol in section 6. This value is measured from the bottom of the airstream discharge nozzle. 3.6 maximum effective airstream width: Manufacturer specified value indicating the maximum width of the airstream
35、in compliance with the applicable performance test protocol in section 6. 3.7 Other definitions: Other terms used in this Standard that have special technical meaning are defined in NSF/ANSI 170. 4 Materials The requirements contained in this section are intended to ensure that the materials used in
36、 construction of equipment resist wear; penetration by vermin; and resist the effects of food, heat, refrigerants, cleaning compounds, sanitizers, and other substances that may contact the materials in the intended use environment. 4.1 Corrosion resistance Exposed surfaces shall be corrosion resista
37、nt. Surfaces may be rendered corrosion resistant by the application of a coating or coatings. Coatings shall conform to the requirements in 4.3. 3 ASTM International, 100 Barr Harbor Dr., West Conshohocken, PA 19428 . 4 Institute of Environmental Sciences and Technology 1827 Walden Office Square, Su
38、ite 400 Schaumburg, IL 60173 2017 NSF NSF/ANSI 37 2017 3 4.2 Smoothness and cleanability Exposed surfaces shall be smooth and easily cleanable. 4.3 Coatings 4.3.1 Coatings containing lead as an intentional ingredient shall not be used. Coatings with an unintentional lead content (lead impurity) grea
39、ter than 0.06% shall not be used. 4.3.2 Coatings shall resist cracking and chipping under use conditions. 4.4 Gaskets Gaskets shall be made of resilient rubber, rubber-like materials, plastics, or a combination thereof. 5 Design and construction This section contains design and construction requirem
40、ents for equipment covered within the scope of this Standard. 5.1 General design and construction requirements 5.1.1 Sanitary design 5.1.1.1 Equipment shall be manufactured to prevent the harborage of vermin and the accumulation of dirt, debris, and moisture, and to permit the inspection, maintenanc
41、e, servicing, and cleaning of the equipment and its components. 5.1.1.2 Exterior surfaces shall be easily cleanable. Interior surfaces of units subject to accumulation of soil shall be accessible for cleaning. 5.1.2 Joints and seams Permanent joints and seams shall be closed. Joints formed by overla
42、pping sheets of metal shall not create upwardly facing horizontal ledges (see figure 5). 5.1.3 Fasteners 5.1.3.1 Fasteners shall not have deep recesses in the head. Fasteners meeting this requirement include slot-head and Phillips-head screws, hex-head fasteners, and flush-break pop rivets. Non-flus
43、h break pop rivets shall be capped or filled. Allen head screws shall be capped or filled. 5.1.3.2 Fasteners shall be tight fitting to the surface. 5.1.3.3 No more than one locking washer and one flat washer shall be used per fastener head. The diameter of the washer adjacent to the fastening surfac
44、e shall not be less than the diameter of the washer under the fastener head. External-tooth lock washers shall not be used. 5.1.3.4 There shall be no exposed threads, projecting screws, or studs on exterior surfaces. Exposed threads on electrical cord strain relief devices in a nonfood zone shall be
45、 exempt. 2017 NSF NSF/ANSI 37 2017 4 5.1.4 Reinforcing and framing 5.1.4.1 Exposed reinforcing and framing members and gussets shall be easily cleanable and manufactured to prevent the harborage of vermin (see figure 6). 5.1.4.2 Reinforcing and framing members and gussets shall not form ledges where
46、 debris may accumulate. 5.1.4.3 Vertical channels that form hollow sections shall be closed at each end, open at each end, or readily accessible along the entire channel. All other hollow sections shall be closed at each end. 5.1.5 Inspection and maintenance panels Where necessary for equipment insp
47、ection and maintenance, removable panels of adequate size shall be provided. Each panel shall be sized to facilitate removal and replacement by one person. 5.1.6 Veneers When applied to panels and equipment surfaces, veneers shall be permanently affixed. All air pockets and open spaces between venee
48、r materials and equipment surfaces shall be eliminated. 5.1.7 Tracks and guides 5.1.7.1 Tracks and guides for doors, covers, and access panels shall be easily cleanable. 5.1.7.2 Tracks and guides shall: have clear open slots continuously or at intervals along their entire length; or have clean-out h
49、oles at each end; or terminate at least in (0.50 in, 13 mm) short of framing at each end; or be integral with the equipment surface and have no square corners. 5.1.8 Equipment mounting Equipment intended to be sealed to walls shall not create inaccessible cavities or areas that may be subject to soiling or vermin harborage. 5.1.9 Insulation 5.1.9.1 Insulation shall be installed so as to prevent it from separating, settling, or becoming compacted under use conditions. 5.1.9.2 Insulated space shall be closed and sealed to protect it from condensation,
