Under the harsh operating conditions of the petrochemical industry, the LYB-LYB3008 pressure transmitter demonstrates outstanding performance by virtue of its diffused silicon sensor core technology. This article provides an in-depth analysis of practical application cases of this model in the petrochemical field, offering decision-makers a selection guide for diffused silicon liquid and gas pressure sensors, covering the technical principles and purchasing points of key models such as BTL-BTL70 and CYB-20SA.

Technical advantages of diffused silicon sensors in the petrochemical industry

In the petrochemical production process, there are complex operating conditions such as high temperature, high pressure, and corrosive media, and traditional sensors are prone to problems such as zero drift and seal failure. The diffused silicon technology used in LYB-LYB3008 directly converts pressure into electrical signals through the semiconductor piezoresistive principle, and its core advantages are reflected in three aspects: first, the 316 stainless steel isolation diaphragm and the parts in contact with the medium can withstand corrosive gases such as hydrogen sulfide; second, the 0.25 accuracy class meets the pressure monitoring requirements of API 675 standards for refining units; finally, the wide temperature compensation capability of -30～+85℃ adapts to extreme environments such as cracking furnaces. Test data from Xi'an Shenghongchuang Instrumentation Co., Ltd. show that during continuous 2000-hour monitoring of an alkylation unit, the stability error of this model was controlled within ±0.1%FS.

Comparative analysis of key models and selection strategies

Three dimensions need to be considered during selection: medium characteristics require special materials such as 316 stainless steel or Hastelloy; the process pressure fluctuation range determines the range selection （it is recommended that the working pressure be within 30%～70% of the range）; and the signal receiving type of the control system should match the 4～20mA or 0～10V output. For example, in a catalytic cracking unit, the domestic flat diaphragm pressure transmitter KZY-K-H703 compact diffused silicon pressure sensor is easier to integrate into narrow spaces due to its compact size.

Typical fault diagnosis and solutions in the petrochemical industry

In an ethylene project, the JYB-KO-M pressure transmitter once experienced periodic jumps in measured values. After analysis by the Xi'an Shenghongchuang technical team, it was found to be diaphragm resonance caused by pulsating flow. The solution included: installing a pulse damper to reduce fluid impact; selecting the SK1151-33X model with a rise time of ≤5 milliseconds; and adding a digital filtering algorithm in the PLC program. Such cases confirm the importance of sensor dynamic response characteristics emphasized by the ISO 2186 standard. For operating conditions such as pressure reducing units where solid particles are present, it is recommended to select the DET-131 model with a sintered metal filter, and its GL1/2 male threaded connection facilitates maintenance and cleaning.

Future technological evolution of diffused silicon sensors

With the mandatory implementation of the IEC 61511 functional safety standard in the petrochemical industry, the new generation of pressure transmitters is developing in three directions: the KYBX-KYBX model integrating the HART7.0 protocol can realize remote diagnostics; the ND-1 model compliant with SIL2 certification meets the requirements of safety instrumented systems; and the KD-KD201 model using MEMS technology reduces power consumption by 40%. The intelligent transmitter prototype currently being tested by Xi'an Shenghongchuang has already realized self-learning temperature compensation algorithms and predictive maintenance reminder functions.

Why choose our professional services

As a national high-tech enterprise, we hold 18 patents related to pressure measurement, and all products have passed TSG 21-2016 special equipment safety technical specification certification. For petrochemical projects, we provide full life cycle services from selection calculation and installation guidance to periodic calibration. Models such as HK-613 have been successfully applied in benchmark projects such as PetroChina Changqing Oilfield. Contact our engineering team now to obtain customized solutions and on-site operating condition assessment services.