DESIGN FEATURE |
SIDE-ENTRY |
FULLY WELDED BODY |
TOP-ENTRY |
Trunnion Mounted Design |
Standard |
Standard |
Standard |
Double Block & Bleed |
As Required |
As Required |
As Required |
Low Trunnion Design |
Standard |
Standard |
Standard |
Support Plate Design |
On Request |
On Request |
On Request |
Independent Stem & Ball (2" and Larger) |
Standard |
Standard |
Standard |
Independent Floating Seats |
Standard |
Standard |
Standard |
Primary Soft Seat-Secondary Metal Seat |
Standard |
Standard |
Standard |
Metal-to-Metal Seated |
On Request |
/ |
On Request |
Self Relieving Seats |
Standard |
Standard |
Standard |
Single Piston Effect Seat Design |
Standard |
Standard |
Standard |
Double Piston Effect Seat Design |
On Request |
On Request |
On Request |
Full Bore or Reduced Bore |
As Required |
As Required |
As Required |
API 6D or API 6A Design and Construction |
On Request |
On Request |
On Request |
Face to Face Dimensions to API 6D and ASME B 16.10 |
Standard |
Standard |
Standard |
Flanged Ends-Welded Ends |
As Required |
As Required |
As Required |
End Flange Type and Dimensions to ASME B 16.5 or ASME B16.47 |
Standard |
Standard |
Standard |
Butt-Welded Ends Type and Dimensions to ASME B 16.25 |
Standard |
Standard |
Standard |
Pup Piece or Transition Pups for Welded Ends Valves |
On Request |
On Request |
On Request |
Fire Safe Design to API 607-4th, API 6FA, BS 6755-Part 2 |
Standard |
Standard |
Standard |
Anti Static Device Design |
Standard |
Standard |
Standard |
Blow-out Proof Stem Design |
Standard |
Standard |
Standard |
Possibility to Check Seat Integrity in Line with Ball in Open or Close Position |
Standard |
Standard |
Standard |
Double Body Seals (O-rings and Gasket) |
Standard |
Standard |
Standard |
Triple Stem Seals (O-rings and Graphite) |
Standard |
Standard |
Standard |
Drain Plug |
Standard |
Standard |
Standard |
Drain Valve |
On Request |
On Request |
On Request |
Vent Valve (on 6" and Larger) |
Standard |
Standard |
Standard |
Emergency Sealant Injection on Stem (on 6" and Larger) |
Standard |
Standard |
Standard |
Emergency Sealant Injection on Seats (on 6" and Larger) |
Standard |
Standard |
Standard |
Seat Pocket Overlay |
On Request |
On Request |
On Request |
Seals Area Overlay |
On Request |
On Request |
On Request |
Body Internal Lining |
On Request |
On Request |
On Request |
Extended Stem for Underground Installation |
As Required |
As Required |
As Required |
Locking Devices |
On Request |
On Request |
On Request |
Lifting Lugs or Lifting Rings |
Standard on 6" and Larger |
Easy Supporting Feet |
Standard on 16" and Larger for 150#~300#
Standard on 10" and Larger for 900#
Standard on 8" and Larger for 1500#~2500# |
Manual or Actuated Operation |
As Required |
As Required |
As Required |
In-Line Maintenance |
/ |
/ |
Yes |
On Site Maintenance |
Yes |
/ |
Yes |