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http://www.shinjovalve.com/three-piece-trunnion-mounted-ball-valve-dbb-ball-valve-class-1500lb.html

Three Piece Trunnion Mounted Ball Valve (DBB Ball Valve)
Sizes range: 2 to 24 inches
Pressure class: American National Standards Institute (ANSI) 1500LB
American Petroleum Institute (API) 6D design
Flanged ends, weld ends
Body material: Forged Steel
Full or reduced port
Standard Features
Three piece forged body and end adaptors
Anti Static device
Anti Blowout Stem
Pressure relief valve to avoid cavity overpressure when applicable
Emergency built-in stem and seat sealant injection system
Fire Safe, MR-0175 NACE compliant, Fugitive Emissions compliant.
Valve Functionality
Double Block and Bleed (DB&B)
Double Isolation and Bleed (DIB-1 or DIB-2)
Seat Design Features
Double Piston Effect
Self Relieving
Combination of options available
Design Standards
B16.34
B16.10
B16.5
B16.25
B16.47
Fire Safe
Low Fugitive Emmisions Compliant
CSA Z245.15.2017