Introducing the SLZ end suction, long coupled, single stage centrifugal chemical process pump—a marvel of engineering. This pump is meticulously standardized to EN 22858 / ISO 2858, ensuring reliability and precision in performance. Ideal for a vast array of applications, it serves the industrial and marine markets with unparalleled efficiency. Designed to seamlessly handle low viscosity clean or slightly contaminated fluids, it effortlessly pumps fresh water, seawater, and fuels like diesel, petrol, and kerosene. Whether it's fuel transfer, chemical processes, energy plants, mining, firefighting, irrigation, water supply and treatment, pressurization, grey water management, dewatering, or marine applications, this pump is your trusted partner in excellence.
Behold a formidable powerhouse: a large, heavy-duty centrifugal chemical process pump boasting extraordinary high flow and high-pressure capabilities. Crafted for robust performance, it stands as a beacon of reliability.
The innovative long-coupled centrifugal chemical process pump design presents an array of remarkable benefits.
Discover unmatched ease of maintenance with the long-coupled configuration, allowing access to the pump head without motor removal. A testament to smart engineering, this feature streamlines service processes.
Engineered for endurance, this process pump is built for continuous, robust use thanks to additional bearings in the pump head. These bearings significantly alleviate strain on the motor during operation, enhancing longevity and performance.
Experience time-saving maintenance with the back pull-out design, enabling motor removal while keeping the pump connected to the pipework. This smart design ensures swift and efficient servicing.
Enhancing durability, the pump and motor feature independent shafts. This means that in the event of a pump shaft failure, only the pump shaft requires replacement, unlike lesser models that necessitate full motor replacement.
The long-coupled design ensures significant space between the pump and motor, safeguarding the motor from fluid ingress should a seal failure occur. This foresight in design promotes extensive protection and durability.
Product Summary
• Effortlessly pumps an impressive range of clean, low-viscosity, or slightly contaminated fluids.
• Choose between closed or semi-open impeller options for tailored performance.
• Quick and easy maintenance is assured with the back pull-out design.
• Master the challenges of intense environments with a maximum fluid temperature capability of 175°C.
• The heavy-duty shaft design prevents fluid contact, ensuring long-lasting reliability.
• Enhance performance with an external seal cooling system.
• Benefit from independent pump and motor shafts for increased operational resilience.
• Available in materials including cast iron, 316 stainless steel, duplex stainless steel, bronze, and more upon request.
• Suction and discharge flanges comply with EN 1092-2 / PN 16, with options for EN 1092-1 / PN 16 for steel and stainless steel casings.
• Choose from gland packing or single, double, and cartridge mechanical seal options.
• Features robust three-phase 50Hz / 60Hz motors, with IP55 standard certification.
• ATEX version available upon request for specialized applications.
• Independent certification can be provided upon request, ensuring quality assurance.
• Crafted in strict accordance with EN 22858 / ISO 2858 standards.
• Designed for low NPSH, ensuring efficient operation.
• The assembly process is streamlined without the need for alignment.
• All impellers are expertly balanced according to ISO 1940 class 6.3 standards.
• Features long-coupled design complete with baseplate for enhanced stability.
• An API seal installation is available, conforming to API682 standards.
• Equipped with oil-lubricated ball bearings for superior performance.
| 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 |
Our centrifugal pumps and chemical pump products are equipped with top-tier, renowned brand bearings, renowned for their longevity and reliability. These superior bearings ensure that our pumps deliver extended service life, even under the most challenging working conditions, making them a steadfast choice for your pumping solutions.
To expertly balance axial thrust, our pumps feature wear rings both at the front and rear of most impellers, complemented by a balance hole strategically placed on the back shroud. For pumps where the axial thrust is minimal, these components—wear rings and balance holes—are strategically omitted from the rear, ensuring optimized design and function tailored to specific needs.
Our high-precision casting impellers are the cornerstone of our pump's unmatched performance. Available in robust materials such as cast iron, stainless steel, and bronze, these impellers are crafted with precision to ensure superior functionality and durability.
Our cutting-edge pump design is categorized into two primary groups, each engineered for specific operational enhancements:
1) "Flush" System: This system introduces clean, cool liquid into the seal chamber, optimizing the operational environment. A secondary, smaller port, typically directed downward, serves as an observation or vent point for leakage, ensuring seamless operation.
2) "Barrier or Buffer" System for Dual Seals: This innovative system supplies a secondary fluid between dual mechanical seals, preventing ambient air from contaminating the pumped fluid, enhancing seal cooling, and significantly boosting safety measures.
Notably, a special external flush arrangement is not a universal requirement for all mechanical seals, offering flexibility and simplification in certain applications.
Flexible Couplings: Engineered for Adaptability and Performance
In contrast to rigid couplings, flexible couplings are adept at accommodating movement, including vibrations and thermal expansion, without sustaining damage. This adaptability makes them ideal for situations with unavoidable misalignment between drive and pump shafts. Their ability to absorb vibrations effectively also contributes to noise reduction during operation. While the design is more intricate and costly, the protective benefits to the shaft and bearings result in significant maintenance savings over time.
Our Semhai API standard chemical pumps are precision-engineered with API 671 Standard Disc Couplings, setting a benchmark in reliability and performance.
Our disc couplings are designed with reduced reaction loads and superior balancing quality compared to standard couplings. This enhancement ensures peak efficiency and effectiveness in the power transmission of the entire pump 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 |
Professional Cooperation Agencies
Shanghai Semhai Pump Co., Ltd. has fostered enduring collaborations with several prestigious domestic pump-testing institutions, ensuring unparalleled reliability and precision in our evaluations. Our key partnerships include:
The esteemed National Quality Supervision and Inspection Center of Industrial Pumps, situated in the vibrant district of Tiexi, Shenyang City,
The renowned Irrigation Machinery Products Quality Inspection Center of the Machinery Industrial, located in the historic Zhenjiang City,
The distinguished Ministry of Agriculture, Water Pump Quality Supervision and Testing Center, nestled in the bustling metropolis of Chongqing City,
And the acclaimed Shanghai Mechanical and Electrical Products Quality Inspection Center, right in the heart of Shanghai City, among others.
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