Manara-maso ny valva baolina, manamarina valves, vavahady valva, globe valva, lolo valva, block sy bleed valves araka ny API6D & API 15000. Ny fitaovana ny valves dia azo amboarina (ohatra araka ny ASTM A105 forgings, ASTM A216 WCB ho an'ny casting, ASTM A351 CF8M fanariana akondro stainless sy duplex kilasy F51.