2. Fire safe construction.
3. Trunnion mounted.
4. Body Vent and Drain, self-relief in Body cavity.
5. Double Block and Bleed.
6. Self Lubrication, urgent grease injection device.
7. Anti-stalic design
8. Stem seal with blow-out proof stem
If you need more information, please visit the website of Jingdong:
http://www.jdbv.com
