Ma valve a DBB plug amasunga malo, amachepetsa kufunikira kwa machitidwe okwera mtengo a ma valve ambiri, ndipo amapereka mphamvu zowonongeka za zero kuchokera kumtunda kupita kumtunda. Kutsekereza ndi kukhetsa magazi komanso kudzipatula pawiri ndi valavu yothandizira kungagwiritsidwe ntchito pazinthu zosiyanasiyana ndi misika, monga gasi wachilengedwe, petrochemical, kutumiza ndi kusungirako, njira yamakampani amafuta, oyang'anira ndi mavavu ochulukirapo m'mapaipi amadzimadzi, ndi mapaipi oyeretsedwa. valavu ya pulagi idapangidwa kuti igwiritsidwe ntchito pamipope yamadzimadzi yokhala ndi ma duct ndi mawonekedwe otulutsa apawiri komanso malo okhala otetezedwa mokwanira.
Valve ya DBB plug imagwiritsidwa ntchito pamapulogalamu omwe amafunikira kudzipatula kofunikira kuti atsimikizire kuti palibe kutayikira komwe kumachitika.Zisankho zamtundu wanji zimadalira mtundu wa ntchito ndi ntchito.Mwachitsanzo, mumsewu wamadzi kapena pafupi ndi mzinda wamadzimadzi, valve yowonjezera iwiri Kukhathamiritsa kwa kuthekera kwa DBB pakudzipatula kofunikira, popeza amapereka chisindikizo cholimba cham'mwamba ndi pansi nthawi imodzi, nthawi zambiri sichikhudzidwa ndi kusintha kwamphamvu kapena kugwedezeka.