Under the harsh operating conditions of the petrochemical industry, the DNLDE series electromagnetic flowmeter, by virtue of its PTFE lining technology, has made a breakthrough in solving the measurement challenge of 98% strong acid media. As a flagship product of Xi'an Shenghongchuang Instrumentation Co., Ltd., its insertion-type design is perfectly compatible with the full range of models such as DNLDJ and L-MAG, providing technical evaluators with a high-precision, corrosion-resistant flow monitoring solution.

I. Core Advantages of PTFE Lining Technology

The DNLDE electromagnetic flowmeter uses polytetrafluoroethylene (PTFE) as the lining material. The bond energy of the carbon-fluorine bonds in its molecular structure is as high as 485kJ/mol, far exceeding that of ordinary rubber materials. Laboratory data show that the annual corrosion rate of this material in strong acid environments such as concentrated sulfuric acid and hydrochloric acid is <0.01mm, significantly better than the 0.5-1.2mm/year of traditional linings. Through its proprietary sintering process, Xi'an Shenghongchuang has achieved a bonding degree of 99.7% between the PTFE lining and the electrodes, ensuring zero attenuation of the measurement signal.

II. Analysis of Typical Application Scenarios in the Petrochemical Industry

In actual operating conditions, the DNLDJ electromagnetic flowmeter has been successfully applied in the following scenarios: 1) metering of 98% sulfuric acid injection in catalytic cracking units of refineries, 2) flow monitoring in hydrochloric acid recovery systems of chemical plants, and 3) proportioning of highly corrosive raw materials on pesticide production lines. Comparative tests conducted by a large petrochemical enterprise showed that under the same operating conditions, the service life of the PTFE-lined L-MAG electromagnetic flowmeter reached 8 years, which is 3.2 times that of equipment with ordinary rubber linings.

III. Comparison of Key Technical Parameters

IV. Professional Guide to Selection and Procurement

Technical evaluators need to focus on: 1) medium temperature range (-40℃~180℃), 2) pipeline vibration level (must comply with IEC60770-1 standards), and 3) explosion-proof certification (Ex dⅡCT6). Commercial evaluators should note: Xi'an Shenghongchuang provides customized services for the full product range including DN18LDE, with delivery lead times shortened by 30% compared with the industry average, while also benefiting from the tax incentive policies for high-tech enterprises in Xixian New Area.

V. Analysis of Common Technical Misconceptions

• Misconception 1:"All PTFE linings perform the same"——in fact, the sintering process directly affects porosity, and inferior products may lead to medium permeation
• Misconception 2:"Insertion-type installation affects accuracy"——actual tests of model LDT-50D show that the error in a DN300 pipe diameter is only ±0.5%
• Misconception 3:"Electromagnetic flowmeters cannot measure low-conductivity liquids"——the specially treated ARSLDE series can measure media with conductivity ≥5μS/cm

VI. Why Choose Xi'an Shenghongchuang

As a high-tech enterprise certified in a national-level new area, we have: 1) an R&D team with 15 years of focus on flow measurement, 2) a CNAS-certified fluid calibration laboratory, and 3) an ISO9001 quality system covering the full product range including LDQ/LDDC. A recently completed ethylene project case showed that our solution helped the customer reduce downtime maintenance losses by as much as 120万元/year.

Get Your Exclusive Solution Now:Visit www.schxyq.com or call 029-84563217, and our engineers will provide you with a 1V1 operating condition suitability analysis for the DNLDE electromagnetic flowmeter, and赠送 "White Paper on Flowmeter Selection for the Petrochemical Industry".