Vuba aha, twakoze valve y'ibinyugunyugu ya wafer ikoreshwa mu cyerekezo cy'ibice bibiri ku bakiriya b'Abayapani, iyi valve ikaba izenguruka amazi akonje, ubushyuhe + 5°C.

Umukiriya yabanje gukoresha valve y'ikinyugunyugu ikoresha icyerekezo kimwe, ariko hari ahantu henshi hakenewe valve y'ikinyugunyugu ikoresha icyerekezo kimwe, bityo umukiriya wacu yadusabye kongera gutanga valve y'ikinyugunyugu ikoresha icyerekezo kimwe muri iyo myanya nta guhindura ingano y'isura ku yindi.

Nyuma y'ikiganiro ku ishami rya tekiniki rya THT, twahisemo gukoresha uburyo bwa mbere bwo gufunga bukoresha icyerekezo kimwe kugira ngo dukore valve y'ikinyugunyugu ifunga mu cyerekezo kimwe. Kubera iyo mpamvu, twatsinze, PN25 positive pressure back pressure 1:1.