Valve Size: 2 to 24 inches (50 to 600mm), nominal pressure Class 600 to 1,500LB
Valve Body materials: carbon steel, alloy steel and stainless steel
Basic design standards:
Basic design: API 600
ANSI B16.34
Face to face: ANSI B16.10
Flanges: up to 24 inches ANSI B16.5
Butt-weld ends: ANSI B16.25
Testing: API 598
Standard descriptions:
Outside screw and yoke bolted bonnet
Parallel double disc
Welded seat ring