Introducing the remarkable SLZ end suction, long coupled, single stage centrifugal chemical process pump, a true marvel engineered to meet the EN 22858 / ISO 2858 standards. Crafted for versatility, this exceptional pump serves a myriad of applications across the industrial and marine landscapes. It excels at handling low viscosity, clean or moderately contaminated fluids, effortlessly managing substances devoid of solid or fibrous impurities. Whether it's fresh water, sea water, or fuels like diesel, petrol, and kerosene, this pump performs flawlessly. Its applications are as diverse as fuel transfer, chemical processing, energy plants, mining, firefighting, irrigation, water supply, water treatment, pressurization, grey water management, dewatering, and marine applications, making it a true powerhouse in fluid management.
Discover the extraordinary capabilities of this large, heavy-duty centrifugal chemical process pump, designed for high flow and high-pressure scenarios. It's engineered to handle the most demanding of tasks with ease and precision.
The meticulously engineered long coupled centrifugal chemical process pump design offers a multitude of benefits, each contributing to its superior performance and reliability.
The innovative long coupled configuration stands out for its user-friendly maintenance. Accessing the pump head without removing the motor is a breeze, simplifying maintenance tasks and minimizing downtime.
Built for resilience, this robust process pump is designed for continuous operation, fortified with additional bearings in the pump head. These bearings absorb a significant amount of operational strain, protecting the motor and enhancing longevity.
The ingenious back pull-out design enables the motor's removal without disconnecting the pump from the pipework, saving valuable time during servicing and maintenance while ensuring seamless operations.
Featuring independent shafts for the pump and motor, this centrifugal chemical process pump ensures that only the pump shaft needs replacement in case of damage. Unlike less durable models that share a motor shaft, risking entire motor replacement, this design is both economical and efficient.
The strategic long coupled design creates ample space between the pump and motor, safeguarding the motor from fluid ingress in the event of a seal failure, thereby enhancing the system's overall durability and reliability.
Product summary
• Expertly pumps a wide array of clean, low viscosity, or slightly contaminated fluids, ensuring optimal performance across various applications.
• Available with your choice of closed or semi-open impeller, tailored to meet specific pumping requirements.
• Ingenious back pull-out design ensures swift and straightforward maintenance, enhancing operational efficiency.
• Capable of handling fluids with a maximum temperature of 175°C, showcasing its robust temperature tolerance.
• Features a heavy-duty shaft that remains isolated from the fluid, preserving its integrity and prolonging service life.
• Offers an external seal cooling system, providing additional thermal protection and ensuring reliable performance.
• Designed with independent pump and motor shafts for enhanced maintenance convenience and cost-effectiveness.
• Available in a variety of materials including cast iron, 316 stainless steel, duplex stainless steel, bronze, and more upon request, catering to a wide range of needs.
• Suction and discharge flanges adhere to EN 1092-2 / PN 16 standards, with options for EN 1092-1 / PN 16 for steel and stainless steel casings, ensuring universal compatibility.
• Offers a selection of gland packing, single, double, and cartridge mechanical seal options, tailored to specific operational requirements.
• Equipped with three-phase 50Hz/60Hz motors, featuring IP55 standard protection for reliable operation across diverse environments.
• Available in an ATEX version upon request, ensuring safety in explosive atmospheres.
• Independent certification available upon request, guaranteeing adherence to rigorous quality and safety standards.
• Meticulously manufactured in accordance with EN 22858 / ISO 2858 standards, delivering consistent, high-quality performance.
• Engineered with a low NPSH requirement, optimizing pump functionality and efficiency.
• Facilitates assembly without alignment, simplifying installation and reducing setup time.
• All impellers are precision balanced to ISO 1940 class 6.3 standards, ensuring smooth and stable operation.
• Features a long coupled design with a baseplate, enhancing stability and ease of installation.
• Capable of accommodating an API Seal, compliant with API682 standards, ensuring industry-leading sealing solutions.
• Equipped with oil-lubricated ball bearings, providing superior lubrication and extending 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 and chemical pumps are equipped with renowned brand bearings, ensuring remarkable durability even under challenging conditions. Expect an extended service life for our centrifugal pumps, crafted to withstand the rigors of demanding environments.
To expertly manage axial thrust, our pumps are designed with precision-engineered wear rings located both at the front and back of the impeller, complemented by a strategically placed balance hole on the back shroud. In cases where the axial thrust is minimal, these components are omitted to enhance efficiency.
Our impellers, crafted through high-precision casting, promise superior performance. Available in durable materials such as cast iron, stainless steel, and bronze, they ensure reliability and excellence in every operation.
Our system is categorized into two main strategies:
1) "Flush" - A method where a clean, cool liquid is introduced into the seal chamber, creating an optimal operating environment. Additionally, a secondary, smaller port, typically positioned downward, serves as a leakage observation point or vent opening, enhancing operational oversight.
2) "Barrier or Buffer" for dual seals - This involves a secondary fluid introduced between two mechanical seal sets to prevent air contact with the processed fluid, improving seal cooling, and boosting safety measures.
Notably, numerous mechanical seals operate effectively without the need for specialized external flush systems.
Flexible Couplings
In contrast to rigid alternatives, flexible couplings adeptly accommodate minor movements such as vibrations and thermal expansion without sustaining damage. This adaptability makes them perfect for scenarios involving unavoidable misalignment between drive and pump shafts. Their ability to absorb vibrations significantly reduces operating noise, though they involve a more complex, costly design. The investment is offset by maintenance savings, as flexible couplings safeguard shafts and bearings against damage and premature wear.
Semhai's API standard chemical pumps feature API 671 Standard Disc Couplings, setting the benchmark for industrial excellence.
These couplings offer superior balancing quality with reduced reaction loads compared to standard couplings, enhancing the overall efficiency and effectiveness of the entire 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 |
Professional Cooperation Agencies
Our company has cultivated enduring and prosperous partnerships with premier domestic pump-testing institutions, including:
The esteemed National Quality Supervision and Inspection Center of Industrial Pumps, located in the industrious Tiexi District of Shengyang City,
The renowned Irrigation Machinery Products Quality Inspection Center of Machinery Industrial, based in Zhenjiang City,
The reputable Ministry of Agriculture, Water Pump Quality Supervision and Testing Center, situated in the vibrant Chongqing City,
And the distinguished Shanghai Mechanical and Electrical Products Quality Inspection Center, right in the bustling heart of Shanghai City, among others.
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