The SLZ end suction, long coupled, single stage centrifugal chemical process pump elevates industrial and marine applications with its exceptional design and engineering. Standardised to EN 22858 / ISO 2858, this pump is a versatile powerhouse tailored to handle a spectrum of applications. Designed to efficiently move low viscosity clean or slightly contaminated fluids, it effortlessly manages substances like fresh water, sea water, and a variety of fuels including diesel, petrol, and kerosene. Its adaptability shines through in a multitude of uses, spanning from fuel transfer, chemical processing, and energy plant operations to mining, fire fighting, irrigation, water supply, water treatment, pressurisation, grey water management, dewatering, and marine applications.
Introducing a robust and mighty centrifugal chemical process pump, engineered for high performance with remarkable flow and pressure capabilities, making it the ideal solution for demanding industrial applications.
The long coupled centrifugal chemical process pump design offers numerous advantages, setting it apart for superior performance and reliability.
The long coupled configuration simplifies maintenance, allowing easy access to the pump head without the need to dismantle the motor, ensuring efficient and hassle-free upkeep.
Engineered for continuous operation, this process pump is robust and reliable, featuring additional bearings in the pump head that significantly reduce motor strain during operation, enhancing longevity and performance.
With the innovative back pull out design, the motor can be detached without disturbing the pump's connection to the pipework, offering substantial time savings during service and maintenance operations.
Featuring independent shafts for the pump and motor, this design ensures that only the pump shaft requires replacement in the event of a break, unlike less robust models that necessitate full motor replacements, saving costs and downtime.
The long coupled design strategically creates a protective space between the pump and motor, safeguarding the motor from fluid ingress in the case of seal failure, thus ensuring durability and reliability.
Product Summary
• Capable of efficiently handling a broad array of clean, low viscosity or slightly contaminated fluids, this pump is a versatile asset across various applications.
• Available with both closed and semi-open impellers, offering flexibility to meet diverse operational requirements.
• Quick and easy maintenance is ensured with the back pull out design, minimising downtime and operational disruptions.
• Capable of handling fluid temperatures up to 175°C, suitable for high-temperature processes.
• Features a heavy-duty shaft that remains untouched by the fluid, enhancing durability and operational integrity.
• Equipped with an optional external seal cooling system for enhanced performance and reliability.
• Boasts independent pump and motor shafts, ensuring ease of maintenance and reduced operational costs.
• Available in a variety of materials including cast iron, 316 stainless steel, duplex stainless steel, bronze, with additional materials available upon request, catering to specific industrial needs.
• Suction and discharge flanges conform to EN 1092-2 / PN 16, with options for steel and stainless steel casings according to EN 1092-1 / PN 16.
• Offers a range of sealing options including gland packing, single, double, and cartridge mechanical seals, ensuring compatibility with diverse applications.
• Equipped with three-phase 50hz / 60hz motors, featuring IP55 as standard, for reliable and efficient power supply.
• An ATEX version is available upon request for applications requiring explosion-proof specifications.
• Independent certification is available upon request, assuring adherence to strict quality and performance standards.
• Manufactured in strict accordance with EN 22858 / ISO 2858 standards, guaranteeing quality and reliability.
• Designed with low NPSH to prevent cavitation and ensure smooth and efficient operation.
• Assembly without alignment is possible, simplifying installation and reducing setup time.
• All impellers are meticulously balanced to ISO 1940 class 6.3, ensuring smooth operation and reduced vibration.
• Long coupled design with a sturdy baseplate provides stability and reliability in demanding operational environments.
• An API Seal can be installed, conforming to API682 standards, offering enhanced sealing solutions for rigorous applications.
• Features oil lubricated ball bearings, enhancing durability and ensuring smooth, efficient 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 centrifugal and chemical pumps proudly incorporate renowned brand Bearings, ensuring unparalleled durability and longevity, even amidst the toughest working environments. With this integration, you can expect an extended service life that stands the test of time.
To expertly balance the axial thrust, our design includes strategically positioned wear rings both at the front and rear of most impellers, complemented by a balance hole on the back shroud. In certain models where axial thrust remains minimal, the need for rear wear rings and balance holes is ingeniously eliminated.
Crafted with precision, our high-quality casting impellers guarantee optimal performance. Available in robust materials such as cast iron, stainless steel, and bronze, these impellers are engineered for excellence.
There are generally two main groups:
1) "Flush" - This method introduces a clean, cool liquid into the seal chamber, significantly enhancing the operational environment. A secondary, smaller port is strategically oriented downward, serving as an invaluable leakage observation or vent opening.
2) "Barrier or Buffer" used with dual seals - A secondary fluid is meticulously fed into the interspace between two sets of mechanical seals, preventing ambient air contact with the pumped fluid. This not only improves seal cooling but also elevates safety measures.
It is noteworthy that not every mechanical seal demands specialized external flush arrangements, allowing for flexible system configurations.
Flexible couplings
In contrast to rigid couplings, flexible couplings are designed to accommodate movement such as vibrations and thermal expansion, mitigating potential damage. Their ability to absorb vibrations makes them ideal for reducing operational noise, especially in scenarios with unavoidable misalignment between drive and pump shafts. Although they feature a more intricate and costlier design, their ability to protect shafts and bearings from damage and premature wear results in significant maintenance savings over time.
Our Semhai API standard chemical pumps are equipped with API 671 Standard Disc Couplings, ensuring unmatched reliability and performance.
These couplings boast lower reaction loads alongside superior balancing quality compared to traditional couplings, resulting in enhanced efficiency and effectiveness in complete 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 robust and enduring partnerships with several prestigious domestic pump-testing institutions. Our collaborative efforts ensure our products meet the highest standards of excellence. We have long-standing relationships with renowned entities such as:
The National Quality Supervision and Inspection Center of Industrial Pumps located in the industrial heart of Tiexi District, Shenyang City,
The Irrigation Machinery Products Quality Inspection Center of Machinery Industrial based in the vibrant city of Zhenjiang,
The Ministry of Agriculture's Water Pump Quality Supervision and Testing Center, nestled in the dynamic city of Chongqing,
And, last but not least, the Shanghai Mechanical and Electrical Products Quality Inspection Center, located in the bustling metropolis of Shanghai. These alliances underscore our commitment to superior quality and innovation.
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