The ball and stem are manufactured as two separate pieces to reduce the effect of the side load generated by the pressure acting on the ball.
Anti-Static Design
The continuity of electrical conductance between all metallic components is guaranteed and certified.
Low Emission Valves
Accurate machining of stem and bonnet sealing surfaces ensures compliance with the most stringent pollution control
regulations. Special “live” seals are available upon request.
Ball Seat Alignment
Stem/flange mechanical stops ensure control and precise alignment of ball rotation.
Longevity of Life
Special consideration was given to enhancing the longevity and performance of our valves throughout the design,
development, testing, and manufacturing stages. The valve designs, combined with the selection of advanced materials,
ensure that long periods of inactivity do not affect operational efficiency.
Trunnion - Mounted Ball
Technical Features
An additional shaft at the bottom secures the ball, and the seat rings are floating, free to move along the valve axis.
Side loads generated by the pressure acting on the ball are absorbed by the bearings.
At low pressure, the seat sealing is achieved by the thrust of springs acting on the seat rings.
As the pressure increases, fluid pressure pushes the seat rings against the ball.
Trunnion-mounted ball valves provide reliable operation and long service life in high-pressure
and large piping systems, featuring excellent sealing performance.
Operating Principle
Turning the valve handle or actuator rotates the ball, opening or blocking the flow path.
The trunnion structure fixes the ball vertically, ensuring stable positioning even under high-pressure conditions.
The spring between the seat and the retainer maintains the sealing force, ensuring the valve’s sealing performance under high pressure.
Floating Ball - Relieving Seat Rings
Technical Features
Two independent floating seat rings ensure the bi-directional tightness of the valve.
The seats are designed to minimize the torque required to operate the valves without losing sealing power, which is assured from zero differential pressure to the valve’s maximum rated pressure.
Self-relieving seats are supplied as a standard feature.
Floating ball valves have a simple structure, are easy to maintain, and operate effectively in low and medium pressure systems.
Operating Principle
When the valve closes, the floating ball is pushed towards the seat rings by fluid pressure, forming a seal.
The relieving seat rings automatically move to relieve excess pressure when it occurs. This is achieved as the fluid pressure pushes the seat rings away from the ball.
