Trunnion Mounted Ball Valves for the Mining and Utilities Industries
The Reliaball is radically different to conventional ball valves and was specifically developed to operate under harsh conditions such as abrasive fluids and high differential isolation.
The non-spherical ball which acts only as a carrier of the soft seats, eliminates problems encountered with conventional ball valves such as the seals being in constant contact with the polished sphere which tends to cause leakage due to scouring and erosion.
Sealing occurs between the ball mounted seats and the single piece body seat rings with their unique profile.
As the valve closes , the seals wipe the seat rings clean, reducing possible damage by entrained sub-stances, thus avoiding an increase in the torque
Full contact between the seal and seat only occurs after the final few degrees of rotation.
In the open position, the seals are protected within the body cavities from direct flow, ensuring less wear and damage from entrained substances, stimulating rinsing and cleaning action of the body cavity.