Construction is as follows
Full port or conventional port.
Outside screw and yoke(OS&Y)
Two piece self-aligning packing gland
Bolted bonnet & spiral wound gasket seal bonnet
Bolted bonnet with spiral-would gasket seal bonnet
Bonnet or threaded and pressure seal bonnet
Integral backseat
Socket weld ends to ASME B 16.11
Screwed ends(NPT) to ANSI/ASME B 1.20.1
Application Standards
Design and manufacture conform to: API602, BS5352, ANSI B 16.34
Connection ends conform to ANSI B 16.11
Screw ends dimension conform to ANSI B 1.20.1
Butt-welded conform to ANSI B 16.25
Flanged ends conform to ANSI B 16.5
Test and inspection conform to: API598
Structure features: Bolted bonnet, outside screw and yoke or Welded bonnet, outside screw and yoke.
Materials conform to ANSI/ASTM
Main materials: A105; LF2; F5; F22; 304(L); 316(L); F347; F321:;F51; Monel; 20Alloy