Iivalve zesango lodaka ziyisango eliqinileyo, isiqu esinyukayo, iivalve zesango ezinamatywina anamandla, ezi zivalo ziyilwe ngokuhambelana ne-API 6A esemgangathweni.Isetyenziselwa ikakhulu udaka, isamente.fracturing kunye nenkonzo yamanzi kwaye kulula ukusebenza kwaye kulula ukuyigcina.