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.
Standards compliance
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