Iifilitha ze-XNJ zothotho zinokufakwa ngaphezulu kwetanki kwaye into ifakwe emanzini kwioyile, ke kulula ukufakwa. Ngexesha lolondolozo, kuya kufuneka ucime izikrufu kwiflange yokudibanisa, kwaye ukhuphe i-flange yokudibanisa, into leyo inokutshintshwa okanye icocwe. Isalathi sokucoca ulwelo kwisihluzi sinika imiqondiso xa uxinzelelo luyehla ngaphaya kwento efikelela -0.018 MPa ebonisa ukuba isihluzi kufuneka sicocwe okanye sitshintshwe. Ukuba akukho sondlo senziweyo, njengoko uxinzelelo lonyuka lonyuka laya kwi-0.02MPa, i-valve yokudlula kwesi sihluzo iya kuvula ukuvumela ukugcwala kweoyile empompeni ngqo, xa ukhetha olu luhlu lokucoca ulwelo, isalathi sokufunxa kufuneka siyimfuneko kwinto evalwe kukungcola , unokuyicoca okanye uyitshintshe kwangoko.