ESD Sour Corrosive Service

The protection of the seat by the stationary core and the comparatively lower hydrodynamic torque provided the customer operational dependability and reliability required in this demanding service.

Challenge

Initial valve installation was a manual block valve application in a natural gas gathering system immediately off of a natural gas well. Some of these well streams include sour/corrosive media requiring materials of construction suitable for NACE service. The customer uses multiple valve sizes in manual and automated configurations in these applications.

Solution

The customer determined, after initial test/evaluation, the internal stationary Core design of the HCV product line protected the seats minimizing potential damage from higher velocities and services that could possibly include entrained solids. The first HCV Valves were tested in March 2008. Eventually the HCV Valves were installed in more demanding, higher flow applications including produced natural gas service including entrained sand. In the case of the ESD (Emergency Shut Down) applications, the valve is required to close and seal bubble tight in emergency conditions to isolate flow from the well into gathering systems. With the internal Core of the HCV Valve providing better protection of the seat/seals, and the significantly reduced hydrodynamic torque, the HCV Valve design provides the operation dependability and reliability demanded for ESD services.