Pipeline Solutions
Gevalco - Pipeline Valve Automation Solutions
Using Gevalco pipeline solutions ensures a safe and reliable pipeline. Gevalco Pipeline Solutions has a 15+ year track record of performance and is known industry-wide for outstanding quality.
Case Study: Excess Flow Control
ATI shipped fifteen hydraulic double acting actuators with newly designed control systems on each of the units. A Houston-based valve automation center approached ATI to design a system to actuate and control the valves on a hydrogen pipeline. The control system is designed to sense a change of 7 psi differential pressure in a pipeline operating at 915 psi which would cause the actuator to shut the valve.
This is important because such an increase in differential pressure would indicate an increase in flow which may mean a leak downstream. Fast speed and fast response were critical in the design of these units.
Case Study: East Tennessee Natural Gas
In early 2003, East Tennessee Natural Gas commissioned the first of its kind bi-directional station bypass at the Ooltewah, TN station. This system, developed and manufactured by Gevalco, was needed to fit the unique operating scenario created by the Patriot project to cross connect three pipeline systems. The actuator controls provide automatic opening of the station bypass valve based on pressure differential across the compressors. The challenge was to provide the same control action when the flow direction was changed, thereby making the normal discharge pressure sensing point the suction pressure point under the reverse flow scenario. By making some unique modifications to the standard Gevalco “Station Bypass Control” system, the new control strategy was implemented seamlessly, requiring no operator changes when switching flow direction. This system ensures the integrity of continuous operation under varying operating conditions. ETNG’s confidence with the system is evidenced by the purchase of 7 additional Gevalco “Bi-Directional Station Bypass Control” systems.