Rising stem rtating and unrisen handwheel outside screw and yoke.Anti-dusty design with position indicator parallel and solid wedge two structures with or without conduit.
Design by API Spec.6D
valvess tested by API 598
Face to Face by ANSI B 16.10
Connection dimensions by ANSI B 16.5~B 16.25
Pressure-Temp by ANSI B16.34
~~~~~~~~~ER410 and 18-8SS orht(co-cra)