The SLZ end suction, long coupled, single-stage centrifugal chemical process pump is meticulously standardized to EN 22858 / ISO 2858, setting a benchmark for versatility across industrial and marine markets. It is masterfully engineered to handle low viscosity clean or slightly contaminated liquids, effortlessly eliminating worries of solid or fibrous particulates. Typically, it accommodates fluids such as fresh water, seawater, and various fuels, including diesel, petrol, and kerosene. Its diverse applications extend across fuel transfer, chemical processing, energy plants, mining, fire fighting, irrigation, water supply, water treatment, pressurization, grey water management, dewatering, and marine operations.
This robust and commanding centrifugal chemical process pump excels in high flow and high-pressure capabilities, catering to demanding industrial needs.
The innovative long coupled centrifugal chemical process pump design is brimming with advantageous features.
The long coupled configuration boasts exceptional maintenance ease, allowing seamless pump head access without motor removal.
Engineered for resilience and relentless performance, this process pump features additional bearings within the pump head, significantly alleviating motor strain during continuous operation.
The ingenious back pull out design permits motor removal while keeping the pump interconnected with the pipework, thus enabling substantial time savings during service or maintenance.
Characterized by independent shafts for the centrifugal chemical process pump and motor, this design ensures that only the pump shaft needs replacement upon failure. In contrast, lesser pumps reliant on motor shafts may require full motor replacement if a shaft breaks.
With its long coupled design, the ample space between pump and motor acts as a safeguard against fluid ingress into the motor in the event of a seal failure.
Product Summary
• Capable of pumping a diverse range of clean low viscosity or slightly contaminated fluids with efficiency and precision
• Flexibly available with either a closed or semi-open impeller for tailored performance
• Back pull out design ensures quick, hassle-free maintenance, enhancing operational efficiency
• Handles fluid temperatures up to a maximum of 175°C, accommodating rigorous industrial demands
• Features a heavy duty shaft that remains isolated from fluid contact, ensuring longevity and reliability
• Equipped with an external seal cooling system to enhance operational stability
• Boasts independent pump and motor shafts to simplify maintenance and reduce downtime
• Available in materials like cast iron, 316 stainless steel, duplex stainless steel, bronze, with other materials accessible upon request
• Suction and discharge flanges conform to EN 1092-2 / PN 16, with options for EN 1092-1 / PN 16 for steel and stainless steel casings
• Offers gland packing or single, double, and cartridge mechanical seal options for diverse application needs
• Compatible with three-phase 50Hz / 60Hz motors, with IP55 protection as standard
• ATEX version available upon request for enhanced safety in explosive atmospheres
• Option for independent certification upon request, ensuring compliance with industry standards
• Crafted in strict accordance with EN 22858 / ISO 2858 standards, ensuring unmatched quality and performance
• Exhibits low NPSH, minimizing cavitation risks and optimizing pump longevity
• Simplified assembly without the need for alignment, streamlining installation processes
• All impellers are precision balanced to ISO 1940 class 6.3, ensuring smooth and efficient operation
• Long coupled design with robust baseplate, providing stability and reduced vibration
• Option to install an API Seal, fully compliant with API682, for enhanced sealing performance
• Incorporates oil lubricated ball bearings, ensuring 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 |
Our centrifugal pumps, including those designed for chemical processes, proudly incorporate renowned brand bearings. These superior components ensure an exceptionally extended service life for our pumps, even when operating in the most demanding environments.
To optimally balance the axial thrust, our pumps feature wear rings strategically placed at both the front and rear of most impeller designs. Additionally, a balance hole is expertly integrated into the back shroud of the impeller. For certain models where the axial thrust is minimal, the need for a rear wear ring and balance hole is elegantly eliminated.
Our high-precision casting impellers guarantee outstanding performance. Constructed from premium materials such as cast iron, stainless steel, and bronze, they deliver reliability and durability across various applications.
We proudly categorize our mechanical seals into two primary groups, offering tailored solutions for diverse operational needs:
1) "Flush" - This method involves the injection of a pristine, cooling liquid into the seal chamber, enhancing the operational environment. An additional smaller, downward-facing port is typically provided, serving as a leakage indicator or vent opening, ensuring optimal performance and safety.
2) "Barrier or Buffer" for dual seals - This approach involves a secondary fluid introduced between two mechanical seals. It acts as a barrier against ambient air, improves seal cooling, and enhances safety by preventing contact with the pumped fluid.
It is important to note that not all mechanical seals necessitate specialized external flush arrangements, offering flexibility in design.
Versatile Flexible Couplings
In contrast to their rigid counterparts, flexible couplings are designed to gracefully accommodate movement, such as vibrations and thermal expansions, without sustaining damage. This adaptability makes them ideal for scenarios where minor misalignments between the drive and pump shafts are unavoidable. Their ability to effectively absorb vibrations also enables them to mitigate excessive operational noise. While they involve a more intricate and costly design, the long-term benefits—such as safeguarding shafts and bearings from damage and premature wear—translate into significant maintenance savings.
Semhai API standard chemical pumps are engineered with API 671 Standard Disc Couplings, ensuring adherence to international quality benchmarks.
These couplings deliver superior performance with lower reaction loads and enhanced 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 |
Professional Cooperation Agencies
Shanghai Semhai Pump Co., Ltd. has forged enduring partnerships with a multitude of prominent domestic pump-testing institutions. Our collaborative network includes:
The esteemed National Quality Supervision and Inspection Center of Industrial Pumps, located in the vibrant Tiexi District, Shengyang City,
The highly regarded Irrigation Machinery Products Quality Inspection Center of Machinery Industrial, nestled in the scenic Zhenjiang City,
The prestigious Ministry of Agriculture's Water Pump Quality Supervision and Testing Center, based in the bustling Chongqing City,
The acclaimed Shanghai Mechanical and Electrical Products Quality Inspection Center, situated in the dynamic Shanghai City, among others.
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