Sealing system is made of a soft seat ring which seals against the ball by means of a resilient insert and against the body by an o-ring. The
resilient insert is firmly retained into a groove of special shape.
Primary and secondary gaskets (firesafe) may be provided in various materials and shapes, according to the pressures and service conditions.
Internal parts that are insulated from the body may build up a static electric charge. When service conditions require electrical continuity to prevent static discharge, this is ensured by the adoption
of coil springs between body, ball and stem.
The design of the valve ensures that the stem cannot be blown out of the body, in the event of the gland being removed while the valve is under pressure.
Stem sealing are made of two sealing barriers, O-ring, trust washer and packing ring.