Abstract The variability of the diaphragm is the main factor for the pressure compensation emitter to achieve stable outflow under high pressure conditions. The characteristic parameters of the diaphragm and the interaction with the emitter housing will directly affect the overall performance of the emitter. In this paper, Supertif-03120-0003 pressure compensating emitter on the pipe manufactured by PLASTRO was used as the prototype, and the on-tube type water emitter test piece was fabricated with the help of(3DP)rapid prototyping technology and selecting silicone rubber elastic diaphragm. Through single factor and orthogonal test, the influence of different parameters of elastic diaphragm on the hydraulic performance of the emitter was studied. The relationship between the hydraulic performance of the emitter and the characteristic parameters of the elastic diaphragm was obtained via multiple comparison analysis. The result of this research shows that the optimal combination of low flow index is A3B4 when the thickness of diaphragm is 2.0 mm and the hardness is 60.
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