Plastic sub-catchment and the valve device works in the application of warm (d)

1.3.3 the requirements of plastic filter



Should satisfy the corresponding control series hydraulic pipe strength performance requirements.



1.4 Long-term performance requirements



1.4.1 plastics are the requirements for sub-catchment



If it is hot-melt adhesive connection or connections, only need to be a long-term hydrostatic strength. If it is mechanical tightening connecting structure, in addition to the need for long-term hydrostatic strength, but also the need for pressure cycling test, anti-pull-out test, bending test and vacuum test.



1.4.2 the requirements of plastic valves



a valve body test and the overall long-term performance of the pilot valve in the product standards are the type of test items, pilot valve used to validate the strength of body, the overall long-term performance of the pilot valve plastic valve used to validate the reliability of the overall design. The course of the pilot test device can not generate additional stress valve.



b Valve testing and long-term performance of the overall pilot valve is the valve body and in accordance with ISO12092 "non-plasticized polyvinyl chloride (PVC-U), chlorinated polyvinyl chloride (PVC-C), acrylonitrile - butadiene - styrene (ABS), acrylonitrile - styrene - acrylate (ASA) pipes, pipe fittings and valves system - pressure resistance - Test method "after the assembly's request for trials.



c in the valve body testing and long-term performance of the overall test process, the specimen does not appear the phenomenon of leakage or rupture, the test to determine eligibility. During the trial before the end of the specimen there is leakage or rupture, the test failed to determine. If there are problems in the connection, the trial judge does not work, need to re-take the test specimen.



1.4.3



Plastic long-term performance of the filter test, filter replaced because of the cover and nut, it should be according to the internal hot water is 95 degrees outside is the way the air at room temperature test, test pressure in accordance with specific requirements.



1.5 Plastic Valve System requirements



1.5.1 fatigue tests of plastic valves



Valve should be opened in the following state of fatigue and related test:



a) Test medium for the water, the valve input pressure and temperature for the nominal pressure PN is (20 ± 3) ℃ conditions;



b) the wide-open valve so that water flow rate to reach (1 ± 0.2) m / s;



c) the valve closed, the output pressure of atmospheric pressure;



d) followed by the wide-open valve so that water flow rate to reach (1 ± 0.2) m / s;



E) not less than 5,000 circulation.



Test method should be consistent with the standards, test all the features of fatigue strength should be maintained in good condition, but also to meet the short-term sealing performance test requirements. ball valve Trunnion Mounted Ball Valve Floating Ball Valve Top Entry Ball Valve Three way ball valve V Type Ball Valve
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