ISO 5782-2:1997 pdf download – Pneumatic fluid power-Compressed airfilters 一 Part 2: Test methods to determine the main characteristics to be included in supplier’s literature.
b) unds constructed of zinc diecast aUoys or plastics,
— operating temperatures up 1050 °C,
continue raisrig the pressure as above until a level of 4 times the poposed rated pressure has been reached,
— operating temperature between 50°C and 80 DC,
continue raising the pressure as above until a level of 5 tImes the proposed rated pressure has been reached.
6.6 CriterIa for a failure are a fracture, a separation of parts or a orack, or any phenomenon which can pass liquid across the pressure-containwg envelope sufficiently to wet the outer surface. Leakage across the pOrt threads may riot constitute a taikire unless caused by a fracture or crack.
6.7 The proposed rated pressure will be verified if all three samples pass the test.
6.8 Where a unit or sub-assembly in the unit (e.g reservoir/sight-glass) is constructed of different materials, the highest appropriate factor should be used. The applied pressure may be restricted to the area of the Interface between the different materials.
6.9 Where the design of the pressure-ccntawiing envelope Is covered by a pressure vessel code in the country of sale, the requirements of that code take precedence over the requirements stated In this part of ISO 5782.
7 Flow-rate tests
7.1 The test circuit shall comply fully with the one described in ISO 6358:1989. figure 1. table 3 arid 5.3,
7.2 The measuring tubes shall comply fully with those described in ISO 6358:1989, figure 3, table 4 and
5,4 and 5.5.
7.3 Each sense of results obtained for a specified test condition shall be r000rdod as soon as a steady state condition has been reached. Recording shall be carried out with care and with a sutficaently slow period of change in conditions to avoid a drift in the steady.state characteristic. A periodic check shall be macis to verify that no pressure Intakes of the measuring instruments are blocked by solid or particles.
7.4 Sel the inlel pressure to test levels of 250 kPa; 630 kPa; 1 000 kPa (2.5 bar; 6.3 bar 10 bar) or apply the rated pressure if different from 1 000 kPa (10 bar). Aust the inlet pressure during the flow-rate test to maintain it constant.
7.5 Begin circulating air through the test circuit, recording flow rate and pressure drop, up to a maximum flow-rate corresponding to a pressure drop equal to the lesser of 80 kPa (0,8 bar) or 20 % of the inlet pressure.
7.6 The results shall be presented in accordance with ISO 5782-1:1997, 4.2.1, figure 2, recording the sIze of port and the type of filter element used In the test, or according to table 1, where the flow at whid, the pressure drop is 5 % of the inlet pressure is tabulated,
8 Us.ful-retentlon.capaclty measurement of the reservoir
8.1 This test method determines the capadly of a filler reservoir with a manually operated drain and is also applicable to semi-automatic drains.
8.2 Select three random samples ot complete filters from normal production units, for each size of filter-reservoir element.
8.3 With the drain closed and the filter completely assembled, measure the amount of liquid necessary to fill the reservoir to a point where the liquid touches the bottom extremities of the battle. Where there is no baffle, the maximum level of admissible liquid, and the specified volume corresponding to this mark, shall be marked on the reservoir.
8.4 DetermIne the average for each group of samples. This will be the rated reservoir capacity for the given reservoir/element combination size.