This study aimed to characterize and evaluate the performance of four models self-compensating drippers commonly used in drip irrigation systems in Brazil. To perform the study it was taking a sample of 25 emitters of each model. Evaluating their tubes (b) coefficient of manufacturing variation (c) wall thickness, (d) characteristic equation of the dripper, (e) internal diameter of the pipe, (f) spacing between emitters, (g) resistance water pressure at ambient temperature and to 40°C and (h) the tensile strength of the pipe with tension of 160 N and 180 N. The analysis showed variation coefficient of less than 0.045 for all manufacturing drippers (0.07 is maximum according to ABNT NBR ISO 9261). The exponents x of the equation pressure versus discharge ranged from 0.0082 to 0.0691 classifying them as self-compensating. From the results obtained it is clear that the tested products which are used in Brazil and used by irrigators had a satisfactory hydraulic performance in accordance with the standard.
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机译：这项研究旨在表征和评估巴西滴灌系统中常用的四种型号的自补偿滴头的性能。为了进行研究，它从每个模型的25个发射器中取样。评估其管（b）制造系数变化（c）壁厚，（d）滴头的特性方程式，（e）管的内径，（f）发射器之间的间距，（g）环境温度下的电阻水压（h）管子的拉伸强度为160 N和180N。分析表明，所有滴头的变化系数均小于0.045（根据ABNT NBR ISO 9261，最大值为0.07）。压力与排放的关系式的指数x在0.0082至0.0691的范围内，将其分类为自补偿。从获得的结果可以清楚地看出，在巴西使用并由灌溉机使用的被测产品具有符合标准的令人满意的水力性能。
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