Gulu la Huadu Valve lili ku Wenzhou, China, likupereka ma valve odalirika amakampani apamwamba kwambiri. Chogulitsa chathu chopangidwa ndi nyenyezi, Carbon Steel National Standard Globe Valve, chimagwiritsa ntchito chitsulo chamtengo wapatali cha WCB, chodzitamandira chokhazikika komanso kutentha kwambiri. Mosiyana ndi mavavu a mpira ndi ma valve a pachipata omwe amayang'ana pa kuwongolera kosavuta, valavu yapadziko lonse ya GB iyi imakhala ndi kapangidwe kake kakatswiri. Ikhoza kusintha molondola kayendedwe ka mapaipi ndi kuthamanga pamene ikuzindikira kudulidwa kwapaipi yolimba, ndi ntchito yabwino kwambiri yotsutsa-backflow. Amagwiritsidwa ntchito kwambiri mu petrochemical, mphamvu yamafuta, kutentha kwapakati ndi mapaipi opangira madzi m'mafakitale omwe amafunikira kuwongolera pafupipafupi.