Ma valve a zipata zamatope ndi zipata zolimba, tsinde lokwera, ma valve a zipata okhala ndi zisindikizo zolimba, ma valve awa amapangidwa motsatira API 6A muyezo.Amagwiritsidwa ntchito makamaka pamatope, simenti.fracturing ndi ntchito yamadzi ndipo ndizosavuta kugwiritsa ntchito komanso zosavuta kuzisamalira.