Kufotokozera: Valavu yotulutsa mpweya yothamanga kwambiri imaphatikizidwa ndi magawo awiri a valavu ya mpweya ya diaphragm yokhala ndi mphamvu yayikulu komanso valavu yolowera ndi yotulutsa mpweya yotsika, ili ndi ntchito zonse ziwiri zotulutsa mpweya ndi zolowetsa. Valavu yotulutsa mpweya ya diaphragm yokhala ndi mphamvu yayikulu imatulutsa mpweya wochepa womwe umasonkhanitsidwa mu payipi pamene payipiyo ili pansi pa mphamvu. Valavu yotulutsa mpweya yotsika komanso yotulutsa mpweya singathe kungotulutsa mpweya wokha...
Tili ndi makina opanga opangidwa bwino kwambiri, mainjiniya odziwa bwino ntchito komanso ogwira ntchito, makina oyang'anira abwino komanso gulu lothandiza la akatswiri ogulitsa zinthu asanagule/atatha kugulitsa la Good Quality China Non Back Flow Preventer, Tikhulupirireni ndipo mudzapeza zambiri. Onetsetsani kuti mukulankhulana nafe kwaulere kuti mudziwe zambiri, tikukutsimikizirani kuti mudzalandira chithandizo chabwino nthawi zonse. Tili ndi makina opanga opangidwa bwino kwambiri...
Valavu ya gulugufe yozungulira kawiri: mavavu a gulugufe yozungulira yokhala ndi flange ili ndi udindo wofunikira chifukwa cha kusinthasintha kwawo komanso kugwira ntchito bwino. Nkhaniyi ikufuna kuwunikira kufunika ndi makhalidwe a valavu yapaderayi, makamaka pankhani yosamalira madzi. Kuphatikiza apo, tikambirana momwe kugulitsa mwachindunji kwa mavavu akuluakulu a gulugufe yozungulira yokhala ndi flange kumaperekera zabwino zosayerekezeka pamtengo ndi mtundu. Yodziwika bwino chifukwa cha kapangidwe kake kosavuta koma kogwira mtima, vavu iyi...