Plug valve kwesịrị ekwesị maka ịkpụpụ ma tinye ya na pipeline, n'ihi usoro dị mfe, ọ nwere uru nke imeghe na imechi ngwa ngwa.Maka usoro isiokwu a, NSEN nwere ike ịnye ụdị eccentric, ụdị aka aka na nrụnye nrịbama n'ụdị mmanye.Nabata ịkpọtụrụ anyị iji nweta onyinye ma ọ bụ hazie valvụ maka ọrụ gị.