... , FM, RJ), clamp, welding neck flangeStructure formFloat, fixed, V-type, and eccentric rotatingSeal formSoft seal, hard, and PTFE sealedConstruction materialA105 ... conditions and allowable leakage for soft seal type O ball valve, type V ball valve and eccentric rotating ball valve ... conditions and allowable leakage for hard seal type O ball valve, type V ball valve and eccentric rotating ball valve ...