抄録
Pump contaminant sensitivity tests were performed using the test facility described in the rust report and the classified test dust described in the second report.
Three types of pumps, namely vane, gear and piston pumps, were used as test pumps. The following results were obtained through experimental verification of the test method using the above mentioned pumps;
(1) The repeatabilityo f the NFPAr ecommendedst andardc an be approved in its presents tate; however, it could be improved.
(2) The reproducibility of the test results at different laboratories is not satisfactory. A more strict definition on the particle distribution of the test dust shall be suggested to obtain better reproducibility. The item defining ability o f filter circuit, or in other words, the time for filtration, should be added to the standard.
