When installing a pressure gauge, should the primary valve be placed near the pressure sampling point or near the pressure gauge itself?
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When installing a pressure gauge with a buffered elbow, should the primary valve be placed near the pressure sampling point or near the pressure gauge? Is it installed before the buffer bend or after the buffer bend? Are there any sources or reasons for that?
When installing a pressure gauge with a buffer bend, the primary valve should be placed near the pressure sampling point, in front of the buffer tube; this way, when the valve is opened, the fluid flows into the pressure gauge through the buffer tube, allowing the buffer tube to perform its buffering function. .
1. The primary valve is located near the pressure tapping point and is used to disconnect the measured fluid from the instrument; closing the root valve effectively isolates the process fluid； (The one-way valve is also known as a root valve.) 2. The pressure gauge is located behind the buffer bend; its purpose is to reduce vibration and shocks, thereby protecting the pressure gauge.
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