Equipment used in the oil & gas processes is complex. Most use swing check valves to ensure full unobstructed flow at normal pressure. In low-pressure conditions, it offers cost-effective, low-maintenance, tight closures to contain backflow. So, what’s an API 6D swing check valve?
What is an API Swing Check Valve?
They are full port swing check valves. They are largely used in the oil and gas pipeline to contain backflow. Additionally, an API 6D swing check valve is effortless to troubleshoot and sustain. The swing valves have a bolted cover and a free-swinging clapper. The clapper is the member that helps in closing to help inflow conditions.
They are mostly suggested for water and wastewater systems applications. It is suitable because of the simple construction, low-pressure drop across the valve, and field serviceability.
Features
The API 6D swing valves prevent backflow in a fraction of a second. As a result, the clapper is the only part that moves and usually swings to allow flow. When the flow stops, the clapper goes back to the close deposition, building an instant obstacle to reverse flow.
All swing valves are full bore through a conduit and enable the flow of several pipeline inspection gauges and spheres. In addition, the full bore design ensures a drop to low pressure across the valve and less turbulence.
The valves are made to pass any pipeline requirement. They come with a raised face, ring-type joint flanges, or weld ends. The flanges are back-faced to offer a smooth bolting surface allowing bolt loading during installation in the pipeline.
Uses
• Stops backflow in pipelines
• Contains leakage to the environment in case of a pipeline rupture
• Protect the integrity of upstream equipment
Recommended design standards
• API 6D,24th edition
• ISO 14723
• ANSI B16.34
• NACE MR0175
• ISO 15156
Certain standards govern how manufacturers should make API 6D swing valves. It helps make sure all the different types in the market have the same standards to serve the purpose. Before purchasing, ensure all the features and recommendations areas should be.
