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Feature:
1.Bolted Lengthen bonnet, Threaded or welded seat ring
2.Full bore, OS&Y, Rising stem, Flexible wedge
3.Pressure relief hole on seat
4.Stainless Steel trim,Metal to Metal Seat
5.Low Permeability Nitrogen Test (-196 )
6.Low Temperature Design
7.Impact Testing per Heat No
8.X-Ray Radiographic Inspection per body
9.Expanded Stem
10.Bi-Direction Seal
11.Zero Leakage
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