BALL VALVES
Ball Valves with trunnions help maintain consistent flow rates for high capacity, heavy-duty applica- tions. They have a rotatable ball with a cylindrical flow passage through the center to the con- trol flow. When the ball is turned one-quarter of the way, the flow stops. The port of a full-port or full- bore ball valve equals the pipeline diameter and presents little or no restriction to flow to allow for pig- ging when not attenuated.
The Fisher G-Series actuator is a highly reliable, spring-return or double-acting actuator exclusively for use on Fisher control valves and Digital Isolation™ products.
Commonly installed on large or high pressure valves and in fast stroking, SIS, and HIPPS applications.
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