While either components play a vital part in controlling fluids , they serve distinctly separate purposes . Control valves are mainly used for totally hindering or somewhat allowing the movement of a substance , acting as a basic start/stop mechanism . Conversely , gas flow indicators are designed to precisely determine the volume of gas that moves

When managing the passage of gas, two frequently-used systems are sphere valves and gas meters. While both fulfill a critical purpose in a gas line, they perform separate tasks. A rotary valve is essentially a simple shutoff device employed to block the gas provision; it doesn't measure the quantity passing through. Conversely, a metering device is