The best way to protect a pressure gauge from pressure surges is by:

Using a snubber with the gauge is the most effective method to protect a pressure gauge from pressure surges. A snubber is a device that is installed in line with the pressure gauge to dampen rapid fluctuations in pressure. It typically contains a small orifice or restriction, which minimizes the effects of sudden pressure spikes, allowing the gauge to provide a more accurate reading over time.

Pressure surges can cause damage to gauges through overstressing or by causing excessive wear and tear. By employing a snubber, you effectively reduce the amplitude of these fluctuations, enabling the gauge to function reliably within its intended operating range. The snubber not only protects the gauge but also helps in extending its lifespan by preventing mechanical failure that can arise from high transient pressures.

The other options, while relevant in some contexts, do not specifically address mitigating the impact of pressure surges. For instance, while a shutoff valve can be used to isolate the gauge when not in use, it doesn't actively protect the gauge during operation. Disconnecting the gauge entirely does not provide any operational benefit while pressure fluctuations are present. A plug valve also serves as an isolation tool rather than a surge suppression device. Therefore, utilizing a snubber represents a targeted solution for safeguarding the integrity and functionality of