Features For application of isolation Ptfe/pfa sleeve Locking device available Pneumatic actuator, limit switch, solenoid valve, air filter regulator, etc. Fire safe design optional Applicables class 150/300/600 standards Valve design: api599 Face to face: ansi b16.10 Flanged ends: ansi b16.5 Buttwelding ends: ansi b16.25 Size range: 1/2"~12"