1、 Collection of SANS standards in electronic format (PDF) 1. Copyright This standard is available to staff members of companies that have subscribed to the complete collection of SANS standards in accordance with a formal copyright agreement. This document may reside on a CENTRAL FILE SERVER or INTRA
2、NET SYSTEM only. Unless specific permission has been granted, this document MAY NOT be sent or given to staff members from other companies or organizations. Doing so would constitute a VIOLATION of SABS copyright rules. 2. Indemnity The South African Bureau of Standards accepts no liability for any
3、damage whatsoever than may result from the use of this material or the information contain therein, irrespective of the cause and quantum thereof. ISBN 978-0-626-23628-1 SANS 5568:2010Edition 4 SOUTH AFRICAN NATIONAL STANDARD Pesticides Insecticidal oil-based space sprays in low and medium pressure
4、aerosol dispensers Determination of internal pressure of filled dispensers Published by SABS Standards Division 1 Dr Lategan Road Groenkloof Private Bag X191 Pretoria 0001Tel: +27 12 428 7911 Fax: +27 12 344 1568 www.sabs.co.za SABS SANS 5568:2010 Edition 4 Table of changes Change No. Date Scope For
5、eword This South African standard was approved by National Committee SABS TC 1028, Pesticides, in accordance with procedures of the SABS Standards Division, in compliance with annex 3 of the WTO/TBT agreement. This document was published in February 2010. This document supersedes SANS 5568:2003 (edi
6、tion 3). SANS 5568:2010 Edition 4 1 Pesticides Insecticidal oil-based space sprays in low and medium pressure aerosol dispensers Determination of internal pressure of filled dispensers 1 Scope This standard gives guidance on the determination of the internal pressure of filled dispensers of insectic
7、idal oil-based space sprays. 2 Method of test 2.1 Apparatus 2.1.1 Waterbath (capable of being maintained at 25 C 1 C and 55 C 1 C), at least 250 mm deep and 200 mm wide, with a suitable stirring device. 2.1.2 Suitable pressure-measuring device, with a tube that fits the valve of the dispenser and th
8、e packing to prevent leakage when the device is pushed against and opens the dispenser valve (see figure 1). NOTE The pressure gauge and the thermometers should be calibrated and the efficiency of the waterbath should be checked periodically. 2.2 Procedure 2.2.1 Place the dispenser under test in an
9、upright position in the waterbath at 25 C 1 C. 2.2.2 After 5 min remove the dispenser from the waterbath, agitate with six up-and-down vigorous shakes, and then return it to the waterbath. 2.2.3 After 30 min apply the pressure-measuring device to the valve of the dispenser, press the valve down, and
10、 note the pressure on the gauge. 2.2.4 Repeat the procedure in 2.2.1 to 2.2.3 (inclusive) with a second dispenser with the water-bath maintained at 55 C 1 C. 2.2.5 Repeat the whole test three times, and report internal pressure as the average of the readings taken. NOTE The method in clause 2 is not
11、 suitable for a metered dose aerosol. SANS 5568:2010 Edition 4 2 Figure 1 Pressure-measuring apparatus SABS SABS Standards Division The objective of the SABS Standards Division is to develop, promote and maintain South African National Standards. This objective is incorporated in the Standards Act,
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