... fixed, V-type, and eccentric rotatingSeal formSoft seal, hard, and PTFE sealedConstruction materialA105, SS304, SS304L, SS316, SS316LSeal materialRPTFE, PPL, flexible ... , working conditions and allowable leakage for soft seal type O ball valve, type V ball valve and eccentric rotating ... , working conditions and allowable leakage for hard seal type O ball valve, type V ball valve and eccentric rotating ...