Imiterere ihagaze neza izwi kandi nka STAD iringaniza valve cyangwa STAD.Iringaniza rihamye rihindura imyigaragambyo yinyuze muri valve kugirango igere ku guhinduka muguhindura icyuho (gufungura) hagati yimikorere ya STAD nintebe ya STAD.Iringaniza rihamye rishobora gukomeza gukwirakwiza ingano y’amazi ukurikije igipimo kibarwa nigishushanyo.Amashami nyuma ya STAD valve yiyongera kandi igabanuka mugihe kimwe.Iringaniza rihagaze ryuzuza igice cyumutwaro munsi yikirere gikenewe.Ikirenzeho, ibisabwa kuri STAD iringaniza valve igira uruhare mukuringaniza ubushyuhe.