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Chengdu Yitong Seal Co., Ltd.
DGS seal application for compressor

DGS seal application for compressor

Product catalog summary

1. Compressor Specifications and Operating Conditions

The document provides detailed technical data on centrifugal compressors equipped with Dry Gas Seals (DGS) used in petrochemical and chemical plants. Compressors are specified by item number, customer, annual production scale (ranging from 40,000 to over 6 million tons/year), model, medium handled (e.g., hydrogen, synthetic gas, recycle gases, ammonia, ethylene, propylene), seal type, manufacturer, and key operating parameters including temperature (from -156°C to 250°C), diameter (26 mm to 350 mm), pressure (near vacuum to over 15 MPa), and rotational speed (up to 40,000 rpm). Most compressors are tandem or double seal types, primarily manufactured by Shenyang BlowerWorks (SBW), with others from Mitsubishi Heavy Industries, Hitachi, Siemens, Demag, Elliott, Xi'an Shaangu Power Co., and others.

2. Applications and Mediums

Compressors serve a wide range of industrial processes such as reforming, hydrocracking, hydrotreating, synthetic gas production, methanol synthesis, aromatic production, catalytic cracking, LNG processing, melamine production, coke oven gas treatment, and air separation. The gases handled include hydrogen-rich recycle gases, synthetic gases, natural gas, CO2, ammonia, ethylene, propylene, refrigerants, and various hydrocarbons.

3. Dry Gas Seal (DGS) Technology and Performance

DGS technology is extensively adopted to improve sealing performance, reduce leakage, and enhance reliability in high-speed, high-pressure compressor applications. Seal configurations include tandem and double seals, often matched or localized by Chengdu Yitong Seal Co., Ltd. Many compressors have been upgraded from mechanical or floating ring seals to DGS, reflecting a trend toward modernization and improved operational efficiency.

4. Operating Parameters and Ranges

Parameter	Range
Temperature (°C)	-156 to 250
Diameter (mm)	26 to 350
Pressure (MPa)	Approximately -0.58 (vacuum) to 15.9
Speed (rpm)	1,040 to 40,000

These wide ranges demonstrate the compressors’ adaptability to diverse industrial conditions, including cryogenic and high-temperature environments.

5. Manufacturers and Equipment Models

Shenyang BlowerWorks (SBW) is the predominant manufacturer, delivering multiple compressor models such as BCL series, MCL series, and others. Other notable manufacturers include Mitsubishi Heavy Industries, Japan Kobe Steel, Nuovo Pignone, Elliott, DEMAG, Xi'an Shaangu Power Co., and SANY Group. Seal suppliers, primarily Chengdu Yitong Seal Co., Ltd., provide matched or localized DGS solutions tailored to compressor models and applications.

6. Repair, Localization, and Upgrades

Many compressors have undergone seal transformations from mechanical or floating ring seals to dry gas seals to enhance reliability and reduce maintenance. Localization efforts by Chengdu Yitong Seal Co., Ltd. ensure seal compatibility with domestic compressor models. Delivery and operation dates span from early 2000s to 2014, indicating ongoing modernization and maintenance activities.

7. Critical Information and Best Practices

DGS Technology: Essential for high-speed centrifugal compressors to reduce leakage and improve operational safety.
Seal Upgrades: Upgrading from mechanical or floating ring seals to DGS is a common practice to enhance compressor performance.
Parameter Matching: Careful alignment of seal type, compressor design, and operating conditions (temperature, pressure, speed) is critical for optimal performance.
Manufacturer Collaboration: Close cooperation between compressor manufacturers and seal suppliers ensures proper integration and localization of DGS technology.
Maintenance: Regular maintenance and seal upgrades are vital for sustaining compressor efficiency and safety.

8. Summary

This document serves as a comprehensive technical reference for centrifugal compressors equipped with dry gas seals across multiple petrochemical and chemical applications. It highlights the widespread adoption and localization of DGS technology, the diversity of compressor models and manufacturers, and the broad range of operating conditions accommodated. The data underscores the importance of seal technology evolution, repair, and collaboration to optimize compressor reliability and efficiency in demanding industrial environments.

Catalog excerpts

Customer Zhanjiang Dongxing Refinery Sinopec Jinan Petrochemical Company Sinopec Yangzi Petrochemical Company Sinopec Tahe Petrochemical Company WEPECWest Pacific Petrochemical Co. WEPECWest Pacific Petrochemical Co. WEPECWest Pacific Petrochemical Co. WEPECWest Pacific Petrochemical Co. WEPECWest Pacific Petrochemical Co. WEPECWest Pacific Petrochemical Co. Sinopec Daqing Petrochemical Company Sinopec Yangzi Petrochemical Company Zhanjiang Dongxing Refinery CNPC Jinxi Petrochemical Company CNPC Changqin Petrochemical Company CNPC hohhot Petrochemical Company Sinopec Jinan Petrochemical Company Sinopec Maoming Petrochemical Company Sinopec Maoming Petrochemical Company Lianyungang Ganghai Chemical Company Dongyin Liyuan EP Company Scale Unit Model Device Name Equipment Name tons/year /Bit No. ºC (mm) MPa r/min reform recycle gas recycle 500,000 BCL457 45/90 120 0.35/0.75 12205 device compressor hydrogen reform recycle gas recycle 39.8/117. 600,000 BCL527 130 0.34/0.66 10200 device compressor hydrogen 3 reform recycle gas recycle 0.35/0.75 1,500,000 BCL807 40/111.4 190 7760 device compressor hydrogen 1 continuous recycle gas 600,000 BCL528 hydrogen 40/139.7 150 0.25/0.65 10030 reform compressor device continuous recycle gas recycle 73.5/107. 0.467/0.6 1,500,000 BCL904-H 130 5425 reform compressor hydrogen 3 9 recycle gas continuous recycle 0.31/0.42 1,500,000 BCL904-L 40/73.5 130 5425 reform compressor hydrogen 7 continuous reform hydrogen recycle 1.28/2.66 1,500,000 BCL609-H 40/118.3 110 8385 reform booster hydrogen 6 device continuous reform hydrogen recycle 0.641/1.3 BCL607-L 40/109 110 8385 1,500,000 reform booster hydrogen 2 continuous recycle BCL409+BCL recycle 49.1/107. 120 3.37/6.90 9356 1,500,000 reform hydrogen 409 hydrogen 6 continuous reform hydrogen BCL607+BCL recycle 106.9/109 1,500,000 120 3.34/6.51 9356 reform booster 609 hydrogen .8 device recycle hydrocracki BCL406/A recycle 5,000,000 52/69.7 92 15/17.2 11000 hydrogen ng K-3102 hydrogen compressor hydrocracki recycle recycle 1,000,000 K53102 56/81.1 92 11/13.5 9541 ng hydrogen hydrogen hydrocracki recycle recycle 1,500,000 BCL407 56/81.1 92 11/13.5 9541 ng hydrogen hydrogen recycle hydrocracki BCL405/A recycle 5,000,000 45/71.5 97.1 9.9/12.4 10321 hydrogen ng K201 hydrogen compressor hydrocracki recycle recycle 1,200,000 BCL407 40/70 100 10.6/12.9 9300 ng hydrogen hydrogen catalytic recycle BCL707/221 recycle 2,500,000 45/90 160 0.33/0.65 7035 reform hydrogen 1-K201 hydrogen recycle BCL408recycle diesel 800,000 50/78.5 100 7.6/9.4 12778 hydrotreat hydrogen 10/K302 hydrogen diesel recycle recycle 2,000,000 BCL408 60/111.6 100 4.1/6.0 11510 hydrotreat hydrogen hydrogen diesel recycle recycle 2,000,000 BCL408 60/111.6 100 4.1/6.0 11510 hydrotreat hydrogen hydrogen diesel recycle 11.6/13.3 1,000,000 K-102 N2、H2、H2O normal/56 130 11862 hydrotreat hydrogen 5 diesel recycle recycle 11.698/13 1,000,000 BCL408/A 56/75.8 150 11631 hydrotreat hydrogen hydrogen .602 DGS Compressor Notes Seal Manufacturer Type SBW(Shenyang DGS matchoperation in tandem BlowerWorks 2011. SBW(Shenyang DGS matchoperation in tandem BlowerWorks 2011. SBW(Shenyang DGS matchdelivery in tandem BlowerWorks 2012. SBW(Shenyang DGS matchdelivery in tandem BlowerWorks 2012. ) SBW(Shenyang DGS matchdelivery in tandem BlowerWorks 2013. SBW(Shenyang DGS matchdelivery in tandem BlowerWorks 2013. SBW(Shenyang DGS matchdelivery in tandem BlowerWorks 2013. ) SBW(Shenyang DGS matchdelivery in tandem BlowerWorks 2013. SBW(Shenyang DGS matchdelivery in tandem BlowerWorks 2014. SBW(Shenyang DGS matchdelivery in tandem BlowerWorks 2014. ) SBW(Shenyang FLOWSERVE DGS tandem BlowerWorks localizationoperation in ) SBW(Shenyang 2008localizationoperation DGS tandem BlowerWorks in 2010 SBW(Shenyang DGS localizationoperation tandem BlowerWorks in 2011 SBW(Shenyang floating ring seal tandem BlowerWorks transformed to be ) SBW(Shenyang DGS,operation in 2011 repairation of localization tandem BlowerWorks DGS,operation in 2011 SBW(Shenyang DGS matchoperation in tandem BlowerWorks 2010. SBW(Shenyang FLOWSERVE DGS tandem BlowerWorks localizationoperation in SBW(Shenyang DGS matchdelivery in tandem BlowerWorks 2012. SBW(Shenyang DGS matchdelivery in tandem BlowerWorks 2012. SBW(Shenyang DGS matchdelivery in tandem BlowerWorks 2012. SBW(Shenyang DGS matchdelivery in tandem BlowerWorks 2013.

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Customer Dongyin Liyuan EP Company Sinopec Yangzi Petrochemical Company Sinopec Daqing Petrochemical Company CNPC Daqing Refinery Company CNPC Daqing Refinery Company Sinopec Yangzi Petrochemical Company Sinopec Yangzi Petrochemical Company Shandong Fangyu Lubricant Co., Ltd. Shandong Qingyishan Petrochemical Technology Co.,Ltd. Shandong Youtai Technology Co.,Ltd. Sinopec Daqing Petrochemical Company Ningbo Jiangning Chemical Co., Ltd. Sinopec Daqing Petrochemical Company Xinjiang Tianye Group Sinopec Yangzi Petrochemical Company Sinopec Beijing Oriental Petrochemical Sinopec Jilin Petrochemical...

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Centrifugal Compressor Dry Gas Seal Performance Chengdu Yitong Seal Co., Ltd. Item Scale Unit Model Device Name Equipment Name tons/year /Bit No. Hubei chemical fertilizer Co.,Ltd. Xinjiang Tianye Group Xinjiang Tianye Group Xinjiang Tianye Group Xinjiang Tianye Group Xinjiang Tianye Group Xinjiang Tianye Group Xinjiang Tianye Group Xinjiang Tianye Group Xinjiang Tianye Group Xinjiang Tianye Group Xinjiang Tianye Group Xinjiang Tianye Group Shandong Wanda Chenmical Co.,Ltd. Sinopec Jilin Petrochemical Company Sinopec Jilin Petrochemical Company Sinopec Jilin Petrochemical Company Sinopec Daqing...

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Centrifugal Compressor Dry Gas Seal Performance Chengdu Yitong Seal Co., Ltd. Item 64 65 66 Customer Luxi Chemical Group Co.,Ltd. Luxi Chemical Group Co.,Ltd. Liaocheng Meiwu New Material Technology Co.,Ltd. Liaocheng Meiwu New Material Technology Co.,Ltd. Scale Unit Model Device Name Equipment Name tons/year /Bit No. 150,000 150,000 butanoloctanol butanoloctanol polybasic alcohol polybasic alcohol Gas hydrogenation Gas hydrogenation Gas hydrogenation of Symplectic dilute aldehyde hydrogenation Medium recycle hydrogen recycle hydrogen Gas hydrogenati on of Symplectic dilute aldehyde Mitsubishi...

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