Is the differential pressure double-flange level gauge dirt-resistant?
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Why is the differential pressure double-flange level gauge dirt-resistant? As far as I remember, level gauges that come into direct contact with the liquid being measured tend to be sensitive to dirt. But can a differential double-flange level gauge handle media with high viscosity (such as heavy oil), or those that are crystalline or contain sediment, without any problems?
No problem; if it’s dirty, use double flanges. That’s what I use – double flanges
Afraid of dirt; the level sensor is installed against the wall, with no dead corners, making cleaning easy
Double flanges are also prone to crystallization blockages, which can lead to inaccurate differential pressure measurements. However, there is usually a vent short circuit in between, making it easy to clean.
What does a vent short circuit look like?
I’m not sure what you mean by \"dirty\". If you’re referring to heavy oil, then there will definitely be residues, but as long as it doesn’t coking or solidify, it actually has no impact on measurement. You need to understand that what truly affects measurement is the inability to transmit pressure accurately, or the occurrence of incorrect pressure readings. By providing heating and insulation at the measurement port, it’s possible to keep the medium in the diaphragm box in a liquid state at all times; unless residues accumulate over time and exceed the liquid sampling point, resulting in inaccurate pressure readings. Attention should also be paid to the gas inlet; factors such as the tendency for crystallization, coking, or dew formation need to be considered, and measures such as heat tracing for insulation may be necessary. Another consideration is the choice of diaphragm material – the corrosion resistance of this material must be taken into account. For example, when industrial naphthalene is used, a 316 material might develop problems after half a year to a year of use. Although industrial naphthalene is slightly acidic, its corrosive effect at high temperatures is very strong, and 316 material is not sufficient to resist such corrosion; therefore, a tantalum alloy should be used instead
I roughly understand it now; since it remains immersed in the medium for an extended period of time, under normal circumstances it doesn’t cause any issues that would prevent pressure from being transmitted.
The vent short circuit is primarily used to prevent pressure buildup due to internal leakage in the hand valve during disassembly； It is also convenient for venting and calibration, and can be purged with steam.
A purge ring can be optionally installed on the flat flange for regular purging, or the use of inserted double flanges can basically solve problems such as crystallization and polymerization
The design of double flanges is intended to be dirt-resistant； The dirt resistance of double flanges is limited, and it cannot solve all problems.