Petroleum Supply Specialists Bravo Practice Test

The primary purpose of a Rising Stem Gate Valve in a pipeline is to completely shut off the fuel flow. This type of valve is designed for on/off service and operates by raising or lowering the stem, which opens or closes the gate within the valve body. When the gate is fully opened, there is minimal resistance to flow, allowing for maximum flow of fuel.

This capability is essential in applications where a complete shut-off is necessary to isolate segments of the pipeline or to perform maintenance without disrupting the entire system. The design of the Rising Stem Gate Valve allows it to provide a reliable seal when closed, ensuring that no fuel escapes and preventing leaks.

While it may also have the effect of providing maximum flow due to its design when fully opened, its defining characteristic is its ability to stop the flow completely, therefore justifying its role in the pipeline as a shut-off valve rather than a flow regulator or pressure control device.