1、 27895 2013 IS 27895:2009 Vacuum technology Valves Leak test (IDT) 2014 278952013 1. , 4 2. 249 3. 31 2013 . 1298-. 4. 27895:2009 . . (ISO 27895:2009 Vacuum technology Valves Leak test) - , - . 5. 1.0null2012 ( 8). - , null . (-) . - , null - (gost.ru) , 2014 , - II 278952013 27895:2009 - . . , - /
2、112 . . - , -. . , -, 27895:2009 , - . , - . () : , . . (, .); ) , - ; ) , -. , , , - . - ( ) . III 278952013 Vacuum technology. Valves. Leak test 20140701 1. - , . - , 110-53/. , . , -. , , . , , , , . 1 , , , - . 2 , , () , , , , . 2. : 3530 . - (ISO 3530, Vacuum technology Mass-spectrometer-type
3、leak detector calibration) - , 1 , - . , , - . , , - (). - , , , , , . , , , , . , , (). , , - , , , 1 278952013 . , , , , . 3. : 3.1 (leak rate) q: , - . 1 O 3530:1979, 2.5.1. 2 3/. 3 - -. , . 4 (. 3.2) - (. 3.3) . 3.2 (standard air leak rate): -, ( ) 25 C , : (100 null 5) , 1 , (23 null 7) C. 1 O
4、3530:1979, 2.5.2. 2 O 3530. 3.3 (equivalent standard air leak rate): 1073/ , . , ( 4) , - ( 29,0), . 1 (4/29)1/2= 0,37 - , O 3530. 2 O 3530:1979, 2.5.3. 3.4 (trace gas): , ( ). - - . , -. 3.5 (operating pressure) p: -. , - , . 3.6 (maximum operating pressure) p,max: -, . 3.7 (ressure difference). 1
5、1 2 . 2 . , - (p1 p2 ).2 278952013 3.7.1 (ressure difference) p ( ): - p1 p2(p2 p1 ). 3.7.2 (ressure difference) p ( ): p1 p2( p1 p2 ). 1 null , 2 null 1 1 null , 2 null 2 3.8 (maximum pressure difference) pmax: - , . pmax, . 3.9 (pressure range of compressed air for a pneumatic valve) pp: , , - . ,
6、 . 3.10 - (torque range for valves with an operating torque specified) : , - , - . 3.11 (operating temperature) To: , . , , . 3 278952013 3.12 (baking temperature) Tb: , - . -. . - . 3.13 (valve temperature) Tv: - . 4. pn , a;pnull , a;p,maxnull , a;putnull , ;pp c , ;p1 , ;p2 , ;q null , 3/;To , C;Tb , C;Tv , C;p null , ;pmaxnull , ; null , .5. 5.1 , , . 5.2 , . . , . 5.3 - . ( ) , - . 5.4 - , - . . 5.5 (23 null 7) C. 5.6 O 3530. 6. 6.1. ! , . 3. - . . . 1 1, ,
