Where Is The Appropriate Location To Install The Plug Valve?

Analyze two different situations:
The two-way plug valve is installed under the surface bend and on the pressure guiding pipe.
When there is a problem with the pressure gauge and gauge bend, close the plug valve to facilitate replacement.
When there is a three-way plug valve, it should be installed below the pressure gauge and above the gauge bend. It can exhaust the meter bend to prevent the meter bend from being blocked, causing inaccurate pressure gauge readings and causing safety hazards.