Size: 50mm to 2500mm Pressure: 150Lb to 2500Lb Temperature: -196 ~ 600 centidegree Suitable medium: water, oil, vapor Connection: wafer, double flanged, butt weld, lug Material: A105, WCB, WC6, WC9, 304, 304 L, 316, 316LOperation: manual control, gear operated, pneumatic operated, electric actuator control Standard 1. Design and Manufacture: API 609 2. Face to face: ANSI B 16.10 3. Inspection and Test: API598 4. Pressure class: ASME B 16.10 5. Flange connection: ASME B 16.5/ B 16.7 Features: Triple offset design Zero leakage, zero seat/ seal friction Low torque Replaceable sealing surface Extended service life