Feature:
1. Spring loaded structure seat, reliable seat seal.
2. Fire safe design.
3. Reliable stem seal, blow-out proof design.
4. Anti-static feature.
5. Wrong operation prevention, locking devices optional.
6. ISO 5211 direct mounting pad optional.

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