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1、INTERNATIONAL STANDARD INTERNATIONAL ORGANIZATION FOR STANDARDIZATION*MEXRYHAPOHAR OPrAHbl3AUHR n0 CTAHAPTH3AUHWORGANISATlON INTERNATIONALE DE NORMALISATION -c.TzcLt. Dsc Sect JQp$ I- b) Allihn condenser (see 8.2), 160 - 250 - 400 and 630 mm; c) coiled distillate condenser (see 8.3), 160 - 250 - 400
2、 and 630 mm; - coolant-tube condensers : d) Graham condenser (see 8.4), 160 - 250 and 400 mm; - double-action condensers : e) jacketed coil condenser (see 8.5), 160 - 250 and 400 mm. 5 MATERIAL Condensers shall be constructed of clear glass of suitable chemical and thermal properties. Internal stres
3、s and visible defects in the glass shall be reduced to a level sufficient to minimize the possibility of fracture due to thermal or mechanical shock. 6 CONSTRUCTION 6.1 The extremities may be plain (see 6.4) or fitted with conical or spherical interchangeable ground glass joints (see 6.3). 6.2 Water
4、 connections, for example olives, should prefer- ably face towards the same side of the condenser, except in the case of type e) condensers, where this configuration may cause an increased risk of fracture. 6.3 Ground glass joints 6.3.1 Conical ground glass joints shall comply with the requirements
5、of IS0 383, the sizes being chosen from the k6 series. 6.32 Spherical ground glass joints shall comply with the requirements of IS0 641, 6.4 The wide end of plain-end condensers shall be fire- polished, and the stem shall be either ground or fire- polished. 6.5 The drip tip at the lower end of the c
6、ondenser shall be cut off at an angle of not less than 30” to the plane of right angles to the longitudinal axis of the condenser. 7 INSCRIPTIONS The following inscriptions shall be permanently marked on all condensers : - the nominal (jacket) length; - the maker s or vendor s name or mark; - the si
7、ze of any ground joints. Copyright International Organization for Standardization Provided by IHS under license with ISO Licensee=NASA Technical Standards 1/9972545001 Not for Resale, 04/27/2007 01:11:28 MDTNo reproduction or networking permitted without license from IHS -,-,- IS0 4799-1978 (E) 8 DE
8、SIGN AND DIMENSIONS Typical condenser designs and essential dimensions are indicated in 8.1 to 8.5. 8.1 Liebig-West condenser -#- - - 4 . . L d2 dl - 4 max I Dimensions in millimetres 1 100 160 250 400 630 1000 dl d2 min. min. 15 9 20 12 24 16 NOTE - In the case of condensers not provided with conic
9、al ground joints, the wide end and the stem shall have the following dimensions : - wide end : length 75 diameter 22 - stem : length 115 diameter 13 2 Copyright International Organization for Standardization Provided by IHS under license with ISO Licensee=NASA Technical Standards 1/9972545001 Not fo
10、r Resale, 04/27/2007 01:11:28 MDTNo reproduction or networking permitted without license from IHS -,-,- IS0 4799-1978 (El 8.2 Allihn condenser T - - i i - Spherical Shapes of enlargement Oval CD + 2 Pear-shaped Spherical, oval or - pear-shaped bulb Dimensions in millimetres ) 1 ;. 1 ;, 1 ;. ) ,i : /
11、 40 1 32 1 25 / NOTE - In the case of condensers not provided with conical ground joints, the wide end and the stem shall have the following dimensions : - wide end : length 75 diameter 22 - stem : length 115 diameter 13 3 Copyright International Organization for Standardization Provided by IHS unde
12、r license with ISO Licensee=NASA Technical Standards 1/9972545001 Not for Resale, 04/27/2007 01:11:28 MDTNo reproduction or networking permitted without license from IHS -,-,- IS0 4799-1978 (El 8.3 Coiled distillate condenser with socket only Dimensions in millimetres 32 min. 1 160 250 400 630 Minim
13、um number of 10 16 25 40 turns in coil NOTE - If the condenser is provided with a cone, this shall be selected from the k6 series of IS0 383. Coil dimensions Copyright International Organization for Standardization Provided by IHS under license with ISO Licensee=NASA Technical Standards 1/9972545001
14、 Not for Resale, 04/27/2007 01:11:28 MDTNo reproduction or networking permitted without license from IHS -,-,- IS0 4799-7978 (E) 8.4 Graham condenser -r; / i / q-J 32 min. I Dimensions in millimetres 11 For coil dimensions, see 8.3. Copyright International Organization for Standardization Provided b
15、y IHS under license with ISO Licensee=NASA Technical Standards 1/9972545001 Not for Resale, 04/27/2007 01:11:28 MDTNo reproduction or networking permitted without license from IHS -,-,- IS0 4799-1978 (E) 8.5 Jacketed coil condenser with cone and socket I I Dimensions in millimetres I I I I 160 250 4
16、00 Minimum number of turns in coil 8 14 23 For coil dimensions, see 8.3. Alternative design of the lower part of the coolant tube Copyright International Organization for Standardization Provided by IHS under license with ISO Licensee=NASA Technical Standards 1/9972545001 Not for Resale, 04/27/2007 01:11:28 MDTNo reproduction or networking permitted without license from IHS -,-,-