Introduction of process piping flow sensor instruments with "valves", are:
1, in the pipeline from its initial state (empty) when it joined the media sensor pressure suddenly changes on both sides, pressure increase, in order to avoid, should close the sensor valves on either side of a, b, c, open the bypass valve;
2, the media is filled with pipes, and after reaching a smooth, balanced, gradually open the a, b, the sensor even pressure on both sides;
3, close valve c, sensor began operating properly;
4, close the order contrary to the foregoing.
In addition, 3 valves also have other effects, such as cleaning pipes after running for some time, the sensor part is not affected (pipeline bypassing).