Double Disc Parallel Slide Gate Valve. 
Size: 2-24 Inches (50-600mm). 
Nominal pressure: 600-1500LB. 
Materials: carbon steel, alloy steel and stainless steel. 
 
Basic design: API 600, ANSI B16.34. 
Face to face: ANSI B16.10. 
Flanges: ANSI B16.5. 
Butt-weld Ends: ANSI B16.25. 
Testing: API 598. 
 
Outside screw and yoke bolted bonnet. 
Parallel double disc. 
Welded seat ring.