High Pressure Gauge Installation Precautions – 90% of People Ignore These Points

❌ Error 1: Installing directly at the pump outlet. The pump outlet experiences the most intense pressure pulsations; direct installation will cause the pointer to swing violently and the internal mechanism to wear out rapidly.

✅ Correct practice: Install a damper (pulsation damper) or needle valve between the pump outlet and the pressure gauge to attenuate the pressure pulsations.

❌ Error 2: Not using a sealing gasket during installation. Threaded seals alone are insufficient under high pressure conditions and are prone to leakage.

✅ Correct practice: Use copper gaskets, aluminum gaskets, or O-rings for sealing. When wrapping with Teflon tape, be careful not to block the threaded through holes.

❌ Error 3: Tightening by jamming the gauge case with a wrench. Using a wrench to jam the gauge case will directly damage the internal mechanism.

✅ Correct practice: Use a wrench to clamp the lower hexagonal nut (wrench side) and tighten, keeping the gauge case stationary.

❌ Error 4: Ignoring the installation direction. Insisting on axial installation for a radially mounted gauge makes reading inconvenient and increases the risk of leakage at bends.

✅ Correct Practice: Select the radial (bottom exit) or axial (back exit) interface direction based on the installation location.

❌ Error 5: No Maintenance Space Allowed The pressure gauge is installed flush against the wall or equipment, making subsequent calibration or replacement impossible.

✅ Correct Practice: Install a three-way plug valve, which facilitates drainage and pressure relief, and also allows for easy disassembly and calibration.

Installation Checklist:

Does the measuring range match the working pressure?

Does the thread specification match the interface?

Is the sealing gasket in place?

Is a buffer device installed (pump outlet)?

Is the tightening method correct (locking the nut without locking the gauge housing)?

Is maintenance space allowed?