Valve Type Primary Function Common Applications in Petroleum Industry Gate Valve On/Off Isolation Used where straight-line flow and minimum restriction are needed. Common in wellheads, pipelines, and tank farms. Not for flow regulation. Ball Valve Quick On/Off Isolation Excellent shut-off capability. Used in offshore platforms, pipeline scraper traps (launchers/receivers), and fuel handling systems. Fire-safe designs are critical. Globe Valve Flow Regulation / Throttling Precisely controls flow