Feature:
1. Easy operation
2. Spring loaded structure seat, reliable seat seal.
3. Fire safe design.
4. Reliable stem seal, blow-out proof design.
5. Anti-static feature.
6. ISO 5211 mounting pad optional.
7. Double block and bleed.
8. Self-relief in body cavity.
9. Urgent grease injection device.

Standard:
DESIGN & MANUFACTURING: API 6D
Face to Face Dimension: ANSI B 16.10
Flanged End Dimension : ANSI B 16.5 & ANSI B 16.47
Testing & Inspection: API 598
Fire Safe Design: API 607