Installation location of the flow restriction orifice plate
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Regarding the installation location of the flow control orifice plate, some are installed in front of the shut-off valve while others are installed behind it. Are there any requirements regarding whether the flow control orifice plate should be installed in front of or behind the shut-off valve? I hope an expert can give some advice. Thank you.
The flow control orifice plate is installed downstream of the shut-off valve
It is installed in front of the valve, making it easy to clean or replace at any time. If it is installed under negative pressure downstream of the valve, that doesn’t pose any problem.
It is generally installed downstream of the shut-off valve, which facilitates installation and replacement; if it is installed upstream, the shut-off valve upstream must be closed during maintenance and replacement