Lo mzimba wevalvu wenziwe ngensimbi yekhabhoni eyenziwe ngobumba futhi usebenza njengengxenye ebalulekile ekuhlanganisweni kwamavalvu ebhola lezimboni. Wenzelwe ukumelana nezimo zokusebenza ezidinga amandla njengokucindezela okuphezulu, ukujikeleza okuvamile, kanye namazinga okushisa ashintshashintshayo. Ingxenye ihlanganiswe ngokuphelele ukuze ivumelane kahle, iqinisekisa izindawo zokuvala ezithembekile, ukulungelelaniswa kahle kwebhore, kanye ne-geometry yeflange ehambisanayo. Uma kudingeka, umzimba ungenziwa ngensimbi engagqwali (304, 316, noma 316L) ukuze isetshenziswe ezindaweni ezigqwalayo noma ezihlanzekile.