Introducing the SLZ end suction, long coupled, single-stage centrifugal chemical process pump—a marvel of engineering precision, standardized to EN 22858 / ISO 2858. This pump is your ultimate solution for a broad spectrum of industrial and marine applications. Elegantly crafted to handle low viscosity fluids, whether pristine or slightly tainted by contaminants, this pump thrives even in the absence of fibrous or solid particulates. It effortlessly manages fluids such as fresh water, seawater, and various fuels, including diesel, petrol, and kerosene. Its versatility shines in applications spanning fuel transfer, chemical processing, energy plants, mining endeavors, fire fighting, irrigation, water supply and treatment, pressurization, grey water management, dewatering operations, and marine industries.
This robust, heavy-duty centrifugal chemical process pump is engineered to deliver exceptional high flow and pressure capabilities, setting new benchmarks in its class.
Discover the myriad advantages of our long coupled centrifugal chemical process pump design, meticulously crafted for efficiency and reliability.
Maintenance simplicity is a hallmark of our design. The long-coupled configuration allows effortless access to the pump head without necessitating motor removal.
Engineered for robustness, this process pump is designed for continuous operation. Additional precision-engineered bearings in the pump head relieve significant strain on the motor during operation, ensuring longevity and consistent performance.
Featuring an innovative back pull-out design, our pump allows the motor to be seamlessly detached while keeping the pump connected to the pipework, dramatically reducing downtime during service and maintenance.
Our pump and motor boast independent shafts—a testament to our commitment to durability. In the unfortunate event of a shaft break, only the pump shaft needs replacing. Unlike less robust competitors relying solely on the motor shaft, hence a more costly replacement.
The intelligently designed long-coupled format maintains a significant gap between the pump and motor, safeguarding the motor from potential fluid ingress in the event of a seal failure, thereby enhancing operational security.
Product Summary
• Expertly pumps diverse clean, low viscosity, or slightly contaminated fluids with ease and precision.
• Available with options of closed or semi-open impeller to suit varied application needs.
• Back pull-out design guarantees swift, hassle-free maintenance.
• Capable of handling maximum fluid temperatures up to an impressive 175°C.
• Features a heavy-duty shaft ingeniously isolated from fluid contact to ensure longevity.
• External seal cooling system available to enhance operational efficiency under demanding conditions.
• Independent pump and motor shafts for enhanced adaptability and long-term resilience.
• Available in a selection of premium materials: cast iron, 316 stainless steel, duplex stainless steel, bronze, and customizable options.
• Suction and discharge flanges are compliant with EN 1092-2 / PN 16, with alternatives for steel and stainless steel casings per EN 1092-1 / PN 16.
• Offers gland packing or single, double, and cartridge mechanical seal options for diverse sealing requirements.
• Equipped with three-phase 50Hz / 60Hz motors, IP55 as standard, ensuring reliable global compatibility.
• ATEX version available on request, catering to environments with explosive atmospheres.
• Independent certification is available upon request, assuring conformity with industry standards.
• Meticulously manufactured in compliance with standard EN 22858 / ISO 2858, guaranteeing quality and reliability.
• Low NPSH (Net Positive Suction Head) feature to minimize cavitation risk, promoting efficiency and safety.
• Easy assembly without the need for alignment, streamlining installation and ensuring swift deployment.
• All impellers are expertly balanced according to ISO 1940 class 6.3, ensuring smooth and reliable operation.
• Long coupled with baseplate for added stability and precision in operation.
• Option for installing an API Seal, compliant with API682, enhancing sealing integrity and reliability.
• Features oil-lubricated ball bearings to ensure smooth operation and extended service life.
| Pump Type |
Centrifugal |
| Max Flow Rate |
1500M³H |
| Max Head |
160M |
| Max Temp |
175°C |
| Max Viscosity |
200 cst |
| Max Solid Passage |
20mm |
| Self Priming |
N |
| Inlet/Outlet Sizes |
32mm to 250mm |
| Mechanical seal type |
Double mechanical seal, API plan |
| Pump Materials |
AISI304, AISI316, AISI316L, Bronze, Cast Iron, Cast Steel, Ductile Iron, Duplex, NiAl Bronze, Super Duplex |
Renowned for incorporating prestigious brand bearings, our centrifugal and chemical pumps promise an extended lifespan even amidst severe operational conditions, ensuring reliability and durability.
Our innovative design incorporates wear rings both at the front and back of most impellers to balance axial thrust, complemented by a strategically placed balance hole on the impeller's rear shroud. For pumps where axial thrust is minimal, the design omits the rear wear ring and balance hole, demonstrating engineering precision and tailored functionality.
Crafted with precision, the high-precision casting impeller guarantees optimal performance across various materials, including cast iron, stainless steel, and bronze, enhancing both efficiency and reliability.
Our systems generally categorize into two crucial groups:
1) "Flush" system: This approach introduces clean, cool liquid into the seal chamber, fostering an improved operating environment. A secondary, smaller port, often positioned downward, doubles as a leakage observation or vent opening, ensuring seamless functionality and operational safety.
2) "Barrier or Buffer" system with dual seals: In this configuration, a secondary fluid circulates between two sets of mechanical seals, effectively blocking ambient air from mingling with the pumped fluid. This not only enhances seal cooling but also optimizes safety features, ensuring superior operational integrity.
It's noteworthy that not all mechanical seals necessitate specialized external flush arrangements, showcasing versatility and adaptability in design.
Flexible couplings
Flexible couplings, unlike their rigid counterparts, are designed to adapt to movements such as vibrations and thermal expansions without incurring damage. Ideal for scenarios with inevitable shaft misalignment, these couplings excel in minimizing excessive noise and vibrations. While their intricate design may incur higher initial costs, their ability to safeguard shafts and bearings from damage leads to substantial maintenance savings over time, offering a balance of cost and performance.
Our Semhai API standard chemical pumps proudly integrate API 671 Standard Disc Couplings, ensuring superior performance and compliance with industry standards.
These couplings deliver lower reaction loads paired with higher balancing quality compared to standard couplings, significantly boosting the efficiency and effectiveness of the entire pump power transmission system.
| Industry |
Services |
| Chemicals, dyes & intermediates |
Organic/inorganic chemicals |
| Oil extraction & waste oil refineries |
Hydrocarbons/Volatile liquids |
| Bulk drugs & Pharmaceuticals |
Dyes & Intermediates |
| Effluent treatment plants |
Water treatment & distribution system |
| Heating & air conditioning plants |
Thermic fluid/ hot oil |
| Cooling towers |
Corrosive/abbrasive liquids |
Collaborative Partnerships with Leading Professional Agencies
Shanghai Semhai Pump Co., Ltd. boasts a prestigious and enduring collaboration with several renowned domestic pump-testing institutions, ensuring peak performance and reliability. Our esteemed partners include large-scale institutions such as:
The National Quality Supervision and Inspection Center of Industrial Pumps, located in Tiexi District, Shenyang City, renowned for its rigorous standards and excellence.
The Irrigation Machinery Products Quality Inspection Center of Machinery Industrial in Zhenjiang City, known for its meticulous attention to quality assurance.
The Ministry of Agriculture’s Water Pump Quality Supervision and Testing Center in Chongqing City, celebrated for its comprehensive testing methodologies.
The Shanghai Mechanical and Electrical Products Quality Inspection Center, situated in the vibrant city of Shanghai, and numerous other distinguished entities.
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