1. pressure: class 150, class 300, class 600 2. size: 2"-20" 3. material: WCB, CF8, CF8M, CF3, CF3M 4. face to face dimension: ANSI B16.10 5. end flange dimension: ANSI B16.5 6. design standard: API 6D&BS 1868 7. inspection and test standard: API 600, BS 6755 and ISO5208 8. structure type: rising stem and wedge single disc 9. operated way: hand wheel, bevel gear, pneumatic and electric