1. material: WCB,LCB,WC6,C12,C5,CF8,CF3,CF3M and CF8M 2. pressure: class 150, class 300, class 600 3. connection type: flange 4. size: 2"-24" 5. design and manufacture standard: API 600, BS1414 and ASME B16.34 6. face to face dimension: API 6D, ANSI B16.10, DIN 3202 and BS 2080 7. end flange dimension: ANSI B16.5 8. test standard: API 598 9. structure type: rising stem and wedge single disc 10. operated way: hand wheel, bevel gear, pneumatic and electric