OEM Retrofit / Repair Flange Transmitter
- Categories:OEM Retrofit / Repair Flange Transmitter
- Time of issue:2020-03-09 00:00:00
OEM Retrofit And Repair Flange Transmitter
1. Provide repair for the diaphragm seal system of the damaged transmitter, mainly including flange diaphragm body, capillary tube and diaphragm, etc.
2, Provide solutions for installation, replacement and maintenance of imported transmitters
Among some imported transmitters, brands such as Rosemount, Yokogawa EJA, E + H, etc. are common. We provide a series of solutions such as design, development, installation, and testing, so as to expand the source of products and reduce costs for users. effect.
3. Provide repair and replacement services for parts of conventional imported transmitters, such as transmitter sensors, circuit boards, displays and housings, etc.
4.Our company provides OEM customization and installation services for pressure transmitters directly mounted single flange, side mounted single flange liquid level transmitters, double flange liquid level transmitters, etc.
Composition Of Diaphragm Seal System
1. Diaphragm sealing system consists of diaphragm body, sealing liquid, capillary and so on. According to the structure, it can be divided into direct installation type and capillary connection type.
2.The function of the diaphragm sealing system is to isolate the measuring medium from the transmitter. The process pressure applied on the diaphragm is transmitted to the pressure measuring element of the transmitter through the sealing liquid, and is finally converted into the corresponding current (4-20mA ), Voltage (0-5V) or digital signal (HART)
The Diaphragm Seal System Should Be Considered In The Following Situations
1. The temperature of the measurement medium exceeds the normal use temperature of the transmitter, and the temperature cannot be reduced to an acceptable range through the impulse tube.
2, the measurement medium contains solid impurities or a liquid with a high viscosity, and the pressure measurement channel will block the pressure measurement channel directly
3, the measurement medium is easy to crystallize, freeze or solidify
4. Hygienic process connection requirements
5. The specific corrosivity of the measurement medium, including acid and alkali corrosion, hydrogen embrittlement corrosion, etc.
1. High-efficiency, high-precision measurement and calibration device. Use world-class equipment.
2. Purification and filling of silicone oil: The technical process comes from the top domestic vacuum research institute, and insists on using high-quality imported silicone oil to ensure that the quality and process are consistent with imported transmitters.
3. Welding: Production process using laser welding as the main and other welding as the auxiliary. Our laser welding equipment is at the forefront of China in terms of related technical indicators to ensure high product qualification rates
4. Standardization: Only high-quality standardized parts can be used to achieve stable quality. From a screw to a flange, we have established our own corporate standards to achieve stable and efficient production.
5. Information can be traced: the repaired instruments are suspended with metal nameplates, and have a special factory serial number, maintenance verification records, diaphragm material, silicone oil brand, and maintenance parameters. Whether on-site or in the laboratory, as long as the repaired table, enter the serial number, you can view all the information of this table
1, Making Diaphragm
The working sequence is: raw materials—blank drawing—heat treatment—forming—heat treatment—aging—inspection. You are not mistaken. A small diaphragm is made through so many processes. The trick is to use multiple heat treatments to eliminate the stress during the forming process of the metal diaphragm without heat treatment. In the subsequent use, the stress will be Generate a false pressure value, and superimposed with the measured pressure, a huge error is generated.
2, Diaphragm Welding
It is reported that Rosemount has used seam welding and other processes, and Yokogawa mostly uses laser welding, which involves welding between stainless steel and Hastelloy, stainless steel and tantalum, stainless steel and nickel and other dissimilar materials. The maintenance department has been using laser welding for many years. Practice has proved that the use of appropriate jigs and fixtures can completely control the welding yield rate of more than 98%.
3, Silicon Oil Filling
Silicone oil has high compression resistance, linearity and temperature resistance. We have a special purification process: filtration-vacuuming-heating-stirring. Filtration is to first filter out impurities in the process. Vacuuming is to allow the air components in the silicone oil to overflow, and then cooperate with heating and stirring to make the non-linearity brought by the water and steam contained in the silicone oil to make the outside of the diaphragm. Pressure is transmitted directly to the pressure-sensitive element through silicone oil.
Since the quality of imported instruments is much better than domestic instruments, users of repaired products are most concerned about the quality after repairing. Therefore, the last step before repairing products must be carefully and strictly verified according to the verification process, and provide verification records. And with a repair order, the user of the product after repair will be clear at a glance.
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