Introducing the SLZ end suction, long coupled, single stage centrifugal chemical process pump, a marvel of engineering standardized to EN 22858 / ISO 2858. This pump is designed to excel across a broad spectrum of industrial and marine applications. Perfectly crafted for pumping low viscosity, clean, or slightly contaminated fluids, it seamlessly handles fresh water, seawater, and various fuels such as diesel, petrol, and kerosene. Whether for fuel transfer, chemical processing, energy plants, mining operations, firefighting, irrigation, water supply and treatment, pressurization, grey water management, dewatering, or marine applications, this pump is your reliable partner.
Introducing a formidable addition to your operations: this large, heavy-duty centrifugal chemical process pump, designed for high flow and high-pressure applications. Engineered for demanding environments, it ensures reliable performance with remarkable efficiency.
Discover the advantages of our long-coupled centrifugal chemical process pump design, offering numerous benefits that enhance operational efficiency and maintenance simplicity.
Experience effortless maintenance with our long-coupled pump configuration. Accessing the pump head without removing the motor simplifies upkeep, making it an easy-to-maintain solution for your needs.
Built for robustness and endurance, this process pump is engineered for continuous operation. It features additional bearings in the pump head to alleviate motor strain, ensuring long-lasting performance.
Enjoy time-saving maintenance with the back pull-out design that permits motor removal while keeping the pump connected to the pipework. This innovative feature streamlines servicing and minimizes downtime.
Our centrifugal chemical process pump boasts independent shafts for the pump and motor, ensuring that only the pump shaft requires replacement if broken. This is a distinct advantage over less robust pumps that use a single motor shaft, which necessitates full motor replacement upon breakage.
The long-coupled design provides ample space between the pump and motor, effectively shielding the motor from fluid ingress in the event of a seal failure, enhancing durability and reliability.
Product Summary
• Capable of pumping a diverse array of clean, low-viscosity, or slightly contaminated fluids.
• Available with either a closed or semi-open impeller for versatile performance.
• Features a back pull-out design enabling quick and hassle-free maintenance.
• Operates efficiently with a maximum fluid temperature of 175°C.
• Equipped with a heavy-duty shaft that remains untouched by the fluid.
• Offers an external seal cooling system to enhance reliability.
• Incorporates independent pump and motor shafts for superior operability.
• Available in a range of materials including cast iron, 316 stainless steel, duplex stainless steel, bronze, and more upon request.
• Conforms to EN 1092-2 / PN 16 for suction and discharge flanges, and EN 1092-1 / PN 16 for steel and stainless steel casings.
• Provides gland packing or single, double, and cartridge mechanical seal options.
• Supports three phase 50Hz / 60Hz motors with IP55 as standard for reliable operation.
• ATEX-certified versions available upon request for specialized applications.
• Independent certification offered upon request to ensure compliance and quality.
• Manufactured to meet EN 22858 / ISO 2858 standards, affirming quality and reliability.
• Designed with low NPSH to enhance operational efficiency.
• Enables assembly without alignment for simplified installation.
• All impellers are precision balanced to ISO 1940 class 6.3 for smooth operation.
• Long-coupled with a robust baseplate for stability and secure installation.
• Option to install an API Seal, compliant with API682, for enhanced sealing performance.
• Utilizes oil-lubricated ball bearings to guarantee durability and smooth operation.
| 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 prestigious and renowned brand bearings are integrated within our state-of-the-art centrifugal pumps and chemical pumps. These bearings ensure a remarkably prolonged service life, even when the pumps operate under the most challenging and demanding conditions, ensuring reliability and excellence.
To expertly balance axial thrust, our pumps feature wear rings both at the front and rear of the majority of the impeller. Additionally, a balance hole is strategically located on the back shroud of the impeller. For pumps where the axial thrust is minimal, the design elegantly forgoes the need for a rear wear ring and balance hole, optimizing performance and efficiency.
The high-precision casting of our impeller guarantees superior performance. Available in materials such as cast iron, stainless steel, and bronze, each impeller is crafted to perfection, ensuring durability and effectiveness in every application.
There are generally two distinguished main groups:
1) "Flush" - A clean, cool liquid is meticulously injected into the seal chamber to enhance the operational environment. An additional, smaller port, usually oriented downward, serves as a convenient leakage observation or vent opening, maintaining optimal conditions and performance.
2) "Barrier or Buffer" used with dual seals - This sophisticated system feeds a secondary fluid into the space between two sets of mechanical seals. This arrangement prevents ambient air from coming into contact with the pumped fluid, significantly improving seal cooling and enhancing overall operational safety.
It should be noted that not all mechanical seals necessitate special external flush arrangements, simplifying maintenance and operation in certain applications.
Flexible couplings
Flexible couplings, unlike their rigid counterparts, are designed to accommodate movement, such as vibrations and thermal expansion, without incurring damage. This makes them ideally suited for situations where some degree of misalignment exists between the drive and pump shafts. Their vibration absorption capability also contributes to noise reduction. These advantages come with a more complex and costly design, yet they provide significant long-term maintenance savings by safeguarding shafts and bearings from damage and premature wear.
Our Semhai API standard chemical pumps are equipped with the API 671 Standard Disc Couplings, setting a benchmark in precision and reliability.
These couplings offer reduced reaction loads with superior balancing quality compared to standard couplings, enhancing overall efficiency and effectiveness in pump power transmission.
| 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 |
Esteemed Collaboration with Professional Agencies
Shanghai Semhai Pump Co., Ltd. proudly boasts enduring partnerships with some of the foremost large-scale domestic pump-testing institutions. Our commitment to quality and precision is reflected in our collaboration with:
The prestigious National Quality Supervision and Inspection Center of Industrial Pumps, located in Tiexi District, Shengyang City, ensuring unwavering quality and reliability in every pump we manufacture.
The renowned Irrigation Machinery Products Quality Inspection Center of Machinery Industrial in Zhenjiang City, providing meticulous scrutiny and assurance of excellence in our products.
The esteemed Ministry of Agriculture, Water Pump Quality Supervision and Testing Center in Chongqing City, offering rigorous evaluations to uphold our superior standards.
The influential Shanghai Mechanical and Electrical Products Quality Inspection Center in Shanghai City, and other eminent institutions, reinforcing our relentless pursuit of perfection.
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