Dump Truck valve technology standards (d)

8.1.2 Where one of the following conditions must be Type tests:



a) reversing the trial (including the old products to plants);



b) When the valve design, process or material changes in performance affect the time;



c) the valve has been stereotyped in the factory test and the pattern of previous test results to occur when the deviation can not be allowed;



d) production batches should be conducted every three years, reversing a pattern of test.



Test and test items:



A) commissioning tests;



B) the scope of the entire flow pressure loss test;



C) with the leak test;



D) Pressure test;



E) durability testing.



8.1.3 Type tests as the number of samples 3 (pieces), in which the entire project to do a test, only the performance of the remaining tests have failed item, the item should be based on the number of double re, such as The project is still not up to standard, the samples for type test failed.



Factory 8.2 trial



Products should be made at the factory before the factory tests, in order to pass inspection by the factory.



Test and test items:



A) commissioning tests;



B) the rated flow capacity of pressure loss under the test;



C) with the leak test;



D) Pressure test.



8.3 to determine the criteria



8.3.1 sub-valve factory pilot project will test and two types of sampling, sampling methods carried out by GB/T2828.



8.3.2 orders for the factory units have the right to pilot projects and requirements for review of the valve, according to review the sampling method for GB/T2828.



8.3.3 reversing special order request, their experimental conditions and rules from the design, manufacture and development of demand-side units.



9 signs, packaging, transportation, storage



9.1 marks



Valve products have a nameplate, and indicate the following:



A) Product name, type and graphic symbols;



B) the main technical parameters of products;



C) the name of manufacturer;



D) ex-factory date.



9.2 Packaging



Reversing the packing material should be moisture-proof ability. The box should be solid and reliable, and its outer wall should be clearly marked neatly marked with the following:



A) Product name, model and quantity;



B) the total mass, kg; net mass, kg;



c) receiving unit name, address and points of departure and arrival;



D) the date of packing. 

  

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