1、NSF International Standard / American National StandardNSF/ANSI 37 - 2012 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.org NSF/ANSI 37 2012 i NSF International Standard/ American National Standard fo
4、r Food Equipment Air curtains for entranceways in food and food service establishments Standard Developer NSF International NSF International Designated as an ANS Standard August 8, 2012 American National Standards Institute ii Prepared by The NSF Joint Committee on Food Equipment Recommended for Ad
5、option 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 Published by NSF International PO Box
6、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 2012.” Copyright 2012 NSF International Previous editions 2009, 2007, 2005, 2002, 1992, 1985, 1980, 1970 Unless otherwise specified, no
7、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 Disclaimers1NSF, in performing its functions in accor
8、dance 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 Standard by anyone. NSF sh
9、all 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. Provisions for mech
10、anical 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, local, state) shall n
11、ot 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 construction criteri
12、a. 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 partial drawings shall
13、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 organization.1The informati
14、on 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. In addition, it does
15、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 Alternative materials, design, and construction 1 1.4 Measurement . 1 2 Normative references . 1 3 Definitions . 2 4 Materials . 2 4.
16、1 Corrosion resistance 2 4.2 Smoothness and cleanability 2 4.3 Coatings . 2 4.4 Gaskets 2 5 Design and construction . 2 5.1 General design and construction requirements 2 5.2 Specific equipment design and construction 4 6 Performance . 4 6.1 Service window air curtains 4 6.2 Customer entry air curta
17、ins 5 6.3 Service entry air curtains 6 6.4 Automatic activation air curtain test 7 7 Labeling 7 Annex A . A1 vi This page is intentionally left blank. vii Foreword2The purpose of this Standard is to establish minimum public health and sanitation requirements for the materials, design, construction,
18、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 provided in parentheses. The Joint Committee carried a motion that this convention be adopted in futu
19、re revisions to this Standard. Issue 5 This revision updated the Normative References and boilerplate language in: 1.4 Measurement. This Standard was developed by the NSF Joint Committee on Food Equipment using the consensus process described by the American National Standards Institute. Suggestions
20、 for improvement of this Standard are welcome. Comments should be sent to Chair, Joint Committee on Food Equipment at standardsnsf.org, or c/o NSF International, Standards Department, P.O. Box 130140, Ann Arbor, Michigan, 48113-0140, USA. 2The information contained in this Foreword is not part of th
21、is American National Standard (ANS) and has not been processed in accordance with ANSIs requirements 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
22、to the Standard. This page is intentionally left blank. 1 2012 NSF NSF/ANSI 37 2012 NSF/ANSI International 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
23、 for the materials, design, construction, and performance of air curtains and their related components. 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 win
24、dows, cooler and cold storage entries). Housing, air moving equipment, air directional regulating devices, 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 tha
25、t equipment may be installed in a sanitary manner, proper installation of equipment shall be governed 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 t
26、o restrict new unit design, provided that such design meets the minimum specifications described herein. 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,
27、 or construction may be acceptable when such equipment meets the applicable requirements herein. 1.4 Measurement 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 Norma
28、tive references The following documents contain provisions that, through reference, constitute provisions 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 poss
29、ibility of applying the recent editions of the documents indicated below. The most recent published edition of the document shall be used for undated references. 2012 NSF NSF/ANSI 37 2012 2 IEEE/ASTM SI 10 2010. American National Standard for Metric Practice3NSF/ANSI 51. Food equipment materials NSF
30、/ANSI 170. Glossary of food equipment terminology 3 Definitions 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 construction of equipment resist wear;
31、 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 resistant. Surfaces may be rendered corrosion
32、resistant by the application of a coating or coatings. Coatings shall conform to the requirements in 4.3. 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 a
33、n unintentional lead content (lead impurity) greater 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
34、section contains design and construction requirements 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 m
35、oisture, and to permit the inspection, maintenance, servicing, and cleaning of the equipment and its components. 3ASTM International, 100 Barr Harbor Dr., West Conshohocken, PA 19428 . 2012 NSF NSF/ANSI 37 2012 3 5.1.1.2 Exterior surfaces shall be easily cleanable. Interior surfaces of units subject
36、 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 overlapping sheets of metal shall not create upwardly facing horizontal ledges (see figure 1). 5.1.3 Fasteners 5.1.3.1 Fasteners shall not have deep recesses
37、 in the head. Fasteners meeting this requirement include slot-head and Phillips-head screws, hex-head fasteners, and flush-break pop rivets. Non-flush 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
38、.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 surface 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 e
39、xposed threads, projecting screws, or studs on exterior surfaces. Exposed threads on electrical cord strain relief devices in a nonfood zone shall be exempt. 5.1.4 Reinforcing and framing 5.1.4.1 Exposed reinforcing and framing members and gussets shall be easily cleanable and manufactured to preven
40、t the harborage of vermin (see figure 2). 5.1.4.2 Reinforcing and framing members and gussets shall not form ledges where 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 othe
41、r hollow sections shall be closed at each end. 5.1.5 Inspection and maintenance panels Where necessary for equipment inspection 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 appl
42、ied to panels and equipment surfaces, veneers shall be permanently affixed. All air pockets and open spaces between veneer 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 T
43、racks and guides shall: have clear open slots continuously or at intervals along their entire length; or have clean-out holes 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. 2012 NSF NSF/ANSI 3
44、7 2012 4 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 u
45、nder use conditions. 5.1.9.2 Insulated space shall be closed and sealed to protect it from condensation, spills, and seepage. Tight fitting, readily removable plugs complying with material requirements may be used to seal off openings to insulated spaces. 5.2 Specific equipment design and constructi
46、on 5.2.1 Fixed panels Fixed panels shall be manufactured and fastened to minimize projections and openings. 5.2.2 Air directional controls The air discharge opening shall be manufactured to permit the outward adjustment of the discharge air direction. Directional controls on air curtains shall be ea
47、sily cleanable or readily removable. If directional controls are readily removable, they shall be keyed so they will only fit the position from which they are to be removed. 5.2.3 Air velocity adjustment Air curtains shall be manufactured to prevent adjustment of air velocities less than those requi
48、red in 6, except as provided in 6.4. 5.2.4 Motors Electrical motors shall be of a totally enclosed type or totally enclosed within a protective housing. 5.2.5 Air intake protection Air intake openings shall be protected by a screen with openings that do not exceed the dimensions of in (0.75 in, 19 m
49、m) diamond-patterned expanded metal filter or other means provided to minimize entrance of foreign articles (e.g., paper) into the air moving equipment. 5.2.6 Filters Readily removable filters shall be provided at the air intake inlet of air curtains for service windows. 6 Performance 6.1 Service window air curtains 6.1.1 Performance requirement When operated in accordance with the manufacturers instructions, the air curtain shall have a minimum 8.0 in (200 mm) air stream depth and an air velocity of at least 600 feet per minute (fpm) (183 meters p
