Flow indicator installations provide different advantages depending on the placement in the application, and the types vary depending on the monitored products. Placing it on the upstream side of the pump, suction conditions become observable which enables speed adjustments for achieving the ultimate flow rate without cavitation. Moreover, if placed at the piping load rack, just before the loading hose, it allows the operator to stay constantly updated on pump conditions.
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With compressors, it can be more useful to install sight flow indicators as they provide a visual indication of when the transport or tank car is emptied so that the operation can be immediately reversed to recover the vapour
Selecting the correct indicator depends on the desired stress endurance and visibility
The sight flow indicators can be provided with dual-sided glass visuals, integral swing check or bi-directional with paddle and a flap
Heavy duty swing check with flow indicators with back-flow protection are specifically designed for pipeline systems and suitable for LPG and NH3
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