1. Forged Body – Provides structual integrity.
2. Ball – Maximized sealing surface for reliable isolation.
3. Catcher Plate – Prevents overtravel of pig and contains it in the bore of the ball.
4. Seat – Provides a perfect seal.
5. Body Seal – Prevents leakage to atmosphere. Variety of materials available to suit application.
6. Stem Seal – Protects against leakage to atmosphere.
7. Trunnion Bearing – Helps ensure consistent operating torque.