![\"Centrifugal](\"https:\/\/www.longgangpump.com\/wp-content\/uploads\/2025\/08\/Centrifugal-Pump-Innovations-That-Withstand-Fire-Ice-and-Corrosion-734x1024.jpg\")
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In the chemical processing industry, unplanned equipment failure can result in millions of dollars in losses due to production halts, safety risks, and environmental hazards. Pumps play a critical role in fluid transport across all stages of chemical manufacturing. If they fail, operations grind to a halt. Therefore, selecting pumps that can withstand extreme environments is not just a maintenance decision\u2014it\u2019s a business imperative.<\/p>\n
Chemical plants operate under some of the harshest conditions imaginable\u2014from cryogenic temperatures to corrosive acids and high-temperature fluids. To address these challenges, Yantai Longgang Pump Industry Co., Ltd<\/span>.<\/b><\/u><\/strong><\/a>\u00a0provides mature solutions for pumps in petrochemical equipment and offers key pumps for many domestic installations and applications, such as tens of millions of tons of oil refining and millions of tons of ethylene. With advanced engineering and customized configurations, Longgang pumps are built to survive where others fail.<\/p>\n Cryogenic fluids like ethylene and propane are highly volatile and prone to gasification. Transporting these substances requires pumps that can perform reliably at ultra-low temperatures without cavitation or mechanical failure.<\/p>\n The LDT vertical barrel pump is engineered specifically for cryogenic applications.<\/p>\n These series pumps are double casing, radial split, multi-stage centrifugal pumps. These series pumps are designed for easily evaporable media, usually buried underground, making them easy to maintain, efficient in cooling, and with a long service life.<\/p>\n It can be equipped with a balance disc or balance drum to balance the axial forces. This feature ensures mechanical stability even during rapid temperature fluctuations.<\/p>\n A multi-point-support structure is employed, with bearing spans meeting the API610 standard. Shaft operates under rigid conditions to ensure the pump\u2019s operating speed remains far below the first critical speed.<\/p>\n In ethylene units like Sinopec Tianjin\u2019s facility, the LDT model has been deployed as an ethylene feed pump\u2014proving its reliability under cryogenic chaos.<\/p>\n High-temperature operations such as boiler feed systems face issues like thermal expansion, leading to shaft misalignment or bearing seizure. Standard pumps often fail under these conditions.<\/p>\n The LZE model is designed for high-temperature environments with a focus on structural stability and lubrication efficiency.<\/p>\n <\/p>\n The pump body outlet \u2265 DN80 adopts a double volute hydraulic design, which greatly balances the radial force.<\/p>\n Longgang\u2019s oil mist lubrication ensures that bearings remain operational even under thermal stress.<\/p>\n The sealing cavity size complies with API682 requirements, and various types of mechanical seals can be configured according to different working conditions.<\/p>\n High-pressure self-balancing boiler feed water pump used in Qingdao Refinery Liquefied Gas Safety Improvement (maleic anhydride) project. The LZE model handled high-temperature liquids efficiently while maintaining safety standards.<\/p>\n Chemical processes involving sulfuric acid or caustic soda quickly degrade conventional materials used in centrifugal pumps. This leads to frequent replacements and increased downtime.<\/p>\n In addition to chemical pumps made of ordinary anti-corrosion materials, the company has successively developed special alloy material pumps such as anti-dilute sulfuric acid, hydrochloric acid, concentrated sulfuric acid, caustic soda, and other highly corrosive super-low carbon duplex stainless steel pumps.<\/p>\n Longgang offers fully customized wetted parts tailored to specific process fluids\u2014ensuring compatibility while extending service life significantly.<\/p>\n Advanced simulation tools like ANSYS are used by Longgang engineers to optimize flow paths within each centrifugal pump design\u2014minimizing turbulence and maximizing efficiency.<\/p>\nSurviving Cryogenic Chaos: -163\u00b0C to -40\u00b0C<\/b><\/strong><\/h2>\n
Challenges of Handling Liquefied Gases<\/b><\/strong><\/h3>\n
LDT (VS6)<\/span><\/u><\/a>\u00a0Vertical Barrel Pump for Cryogenic Stability<\/b><\/strong><\/h3>\n
Dual-Casing Structure for Temperature Resistance<\/b><\/strong><\/h4>\n
Balance Drum to Control Axial Thrust<\/b><\/strong><\/h4>\n
Multi-Point Shaft Support to Prevent Rotor Deflection<\/b><\/strong><\/h4>\n
Application: Sinopec Tianjin Ethylene Feed Pump Upgrade<\/b><\/strong><\/h4>\n
Battling Blazing Heat: Up to 450\u00b0C<\/b><\/strong><\/h2>\n
Thermal Expansion and Bearing Seizure in High-Temp Fluids<\/b><\/strong><\/h3>\n
LZE (OH2)<\/span><\/u><\/a>\u00a0Centerline-Mounted Overhung Pump Solution<\/b><\/strong><\/h3>\n
![\"LZE(OH2)\"](\"https:\/\/www.longgangpump.com\/wp-content\/uploads\/2025\/08\/LZEOH2.jpg\")
<\/p>\nDouble Volute Design for Radial Force Balance<\/b><\/strong><\/h4>\n
Oil Mist Lubrication System for High-Temperature Operation<\/b><\/strong><\/h4>\n
API 682 Seal Compatibility for Safety Assurance<\/b><\/strong><\/h4>\n
Application: Boiler Feed Pump in Qingdao Maleic Anhydride Project<\/b><\/strong><\/h4>\n
Resisting Acidic and Alkaline Corrosion<\/b><\/strong><\/h2>\n
Corrosive Fluids Damaging Impellers and Seals<\/b><\/strong><\/h3>\n
Longgang\u2019s Proprietary Alloy Solutions for Harsh Chemicals<\/b><\/strong><\/h3>\n
R&D-Based Material Innovation Against Sulfuric Acid Erosion<\/b><\/strong><\/h4>\n
Customiz<\/b><\/strong>ed<\/b><\/strong>\u00a0Wetted Parts for Process Compatibility<\/b><\/strong><\/h4>\n
Why Longgang Engineering Excels in Harsh Environments<\/b><\/strong><\/h2>\n
CFD-Optimized Hydraulic Design with ANSYS\/WINCASTER<\/b><\/strong><\/h3>\n
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<\/p>\nAchieving 90.5% Efficiency in BB2 Pump Models<\/b><\/strong><\/h3>\n