doubleFlange transmitterIt is composed of adding a remote transmission sealing device on the basis of a regular transmitter. The remote transmission sealing device consists of three parts: a flange diaphragm box, a capillary tube, and a filling liquid inside the capillary tube. During operation, the measured medium acts on the isolation diaphragm of the flange diaphragm box, and the pressure is transmitted to the sensitive element of the transmitter through the filling liquid in the capillary tube. After conversion, the instrument outputs the corresponding signal. .
In order to adapt to different needs,doubleFlange transmitterIt has multiple forms of remote transmission devices, with the same main structure as differential pressure transmitters, and is widely used in industries such as petroleum, chemical, power, food, papermaking, and municipal engineering.
Therefore, when selecting and using a dual flange transmitter, both operating temperature and operating pressure must be considered simultaneously. In order to ensure the normal operation of the double flange transmitter for measuring high-temperature medium parameters (liquid level, flow rate, etc.) without heat tracing, it is recommended to use a double flange transmitter filled with H-type (working pressure is positive) or K-type (working pressure is negative) silicone oil. However, a heat dissipation section should be added between the impulse valve and the connecting flange of the transmitter to reduce the temperature at the isolation diaphragm of the transmitter to 150-200 ℃ (while ensuring the flow of the measured medium, the temperature should be lower to ensure the long life of the transmitter). When the tested medium is corrosive to 316L, the isolation diaphragm of the double flange transmitter must be made of corresponding corrosion-resistant materials.
doubleFlange transmitterSuitable occasions
Viscous medium at high temperature
Easily crystallizable medium
Settling media with solid particles or suspended solids
Strong corrosive or highly toxic media
Can eliminate the occurrence of pressure pipe leakage and pollution of the surrounding environment; It can avoid the tedious work of frequently replenishing isolation fluid due to the instability of measurement signals when using isolation fluid.
Continuous measurement interface and density
The remote transmission device can avoid the mixing of different instantaneous media, thus enabling the measurement results to truly reflect the actual situation of process changes.
Places with high hygiene and cleanliness requirements
In the production of food, beverage, and pharmaceutical industries, not only is it required that the contact area of the transmitter with the medium meet hygiene standards, but it should also be easy to rinse to prevent cross contamination of different batches of media.