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What is the purpose of using a siphon or pigtail with a steam pressure gauge?
From steam temperature
Against high steam pressure
Against high water pressure
Against an excessive amount of steam
The correct answer is: From steam temperature
The purpose of using a siphon or pigtail with a steam pressure gauge is primarily to protect the gauge from high steam temperatures. When steam enters the gauge, it can reach temperatures that may damage the gauge itself. By incorporating a siphon or pigtail, which is typically filled with water, the steam cools down before it reaches the gauge. This design allows the gauge to operate effectively while ensuring that its components are not exposed directly to the high temperatures of the steam. The siphon essentially acts as a barrier, capturing the steam and allowing for a reduction in temperature, which is crucial for accurate readings and longevity of the gauge. Therefore, using a siphon or pigtail is an important practice in managing the effects of high steam temperatures on pressure gauges.