I-oyile neGesi
Ishishini le-oyile negesi liqulunqwe ziinkqubo ezininzi elunxwemeni nakwi-offshore ezifuna ukusetyenziswa kweevalvu ezikhawulezayo nezithembekileyo.I-Covnavalve ngumdlali ophambili wokwenziwa kweevalvu ezisetyenziselwa i-petrochemical, ukuhanjiswa, ukugcinwa kunye nokusebenza, imveliso edadayo kunye nezicelo zokukhusela umlilo phakathi kwezinye izicelo ze-oyile kunye negesi yegesi efana nokupholisa.