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Q1: What is the difference between a diaphragm pressure gauge and an ordinary stainless steel pressure gauge?
A: The medium of ordinary stainless steel pressure gauges will directly contacts the internal spring tube; The diaphragm pressure gauge relies on the diaphragm to completely separate the process medium from the meter head movement. Suitable for strongly corrosive, viscous, crystalline, and granular media to prevent corrosion and blockage of the movement. Diaphragm pressure gauges are preferred for harsh media that cannot be handled by ordinary stainless steel gauges.
Q2: How to choose the membrane material?
A: 316L membrane is generally used for weak corrosion conditions; Use Hastelloy alloy for strong acid-base and chemical media; Due to strong corrosion and high permeability of the medium, a PTFE-lined membrane can be selected, and the selection needs to be confirmed based on the actual composition of the medium.
Q3: Can diaphragm pressure gauges withstand vibration?
A: Sure, selecting an oil-filled and shock-resistant diaphragm pressure gauge for the meter head can cope with vibration and pressure pulsation conditions such as pumps and compressors; Ordinary oil-free meter heads are not suitable for sites with high vibration.
Q4: What should be paid attention to when using a diaphragm pressure gauge, and what faults may occur?
A: It is strictly prohibited to use it under overpressure to avoid deformation and damage to the diaphragm; Do not dismantle the diaphragm area at will to prevent leakage of isolation fluid; It is recommended to install a heat dissipation device when the medium temperature is too high. Common faults include membrane damage, leakage of isolation fluid, inaccurate readings, and the need for timely maintenance and replacement.
