Introducing the SLZ End Suction, Long Coupled, Single Stage Centrifugal Chemical Process Pump—a marvel of engineering standardized to EN 22858 / ISO 2858. Perfectly suited for industrial and marine markets, it excels in pumping low viscosity clean or slightly contaminated fluids, free from solid or fibrous materials. It's the ultimate choice for handling fresh water, sea water, and various fuels, including diesel, petrol, and kerosene. This pump shines in diverse applications such as fuel transfer, chemical processing, energy plants, mining, firefighting, irrigation, water supply, water treatment, pressurization, grey water management, dewatering, and marine environments.
Meet the powerhouse of centrifugal chemical process pumps, specially crafted for high flow and high-pressure scenarios. This robust giant is your reliable partner for the most demanding tasks.
Discover the myriad benefits of our long-coupled centrifugal chemical process pump design, crafted for efficiency, durability, and ease of maintenance.
With its long-coupled configuration, maintenance becomes a breeze as you can access the pump head without the hassle of motor removal.
Built for continuous operation, this process pump boasts remarkable robustness, featuring additional bearings in the pump head that relieve motor strain during operation.
Thanks to the back pull-out design, you can swiftly remove the motor while keeping the pump connected to the pipework, significantly reducing downtime during servicing and maintenance.
Experience the advantage of independent pump and motor shafts. In case of a shaft break, only the pump shaft needs replacement—unlike less robust alternatives that require entire motor replacement if the shaft breaks.
The brilliance of the long-coupled design ensures a generous gap between the pump and motor, safeguarding the motor from fluid ingress should a seal failure occur.
Product Summary
• Engineered to adeptly pump a diverse range of clean low viscosity or slightly contaminated fluids.
• Choose between closed or semi-open impeller options to suit your specific needs.
• Enjoy effortless maintenance with the innovative back pull-out design.
• Capable of handling fluids with temperatures soaring up to 175°C.
• Heavy-duty shaft crafted to remain untouched by the fluid.
• Available with an external seal cooling system to enhance performance.
• Benefit from independent pump and motor shafts for easy component replacement.
• Constructed from materials like cast iron, 316 stainless steel, duplex stainless steel, bronze, and more upon request.
• Suction and discharge flanges are designed to meet EN 1092-2 / PN 16 standards, with options for EN 1092-1 / PN 16 for steel and stainless steel casings.
• Available with gland packing or seals in single, double, and cartridge configurations.
• Equipped with three-phase 50Hz / 60Hz motors, IP55 as standard.
• ATEX certification available upon request for added safety.
• Independent certification can be provided upon request to meet your regulatory needs.
• Manufactured in strict accordance with EN 22858 / ISO 2858 standards for guaranteed quality.
• Features a low NPSH design to optimize performance.
• Easy assembly without the need for alignment.
• All impellers meticulously balanced to ISO 1940 class 6.3 for superior efficiency.
• Long-coupled with a sturdy baseplate for stability.
• Option to install an API Seal according to API682 for enhanced sealing.
• Includes oil-lubricated ball bearings for smoother 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 |
At Shanghai Semhai Pump Co., Ltd., we integrate only the most renowned brand Bearings into our centrifugal and chemical pump products. These bearings ensure an extended service life for our pumps, even when operating in the most challenging environments. Our commitment to quality promises durability and reliability.
To effectively balance axial thrust, our innovative design includes wear rings positioned both at the front and rear of most impellers, alongside a strategically placed balance hole on the back shroud. For pumps with minimal axial thrust, we have ingeniously designed them without a rear wear ring or balance hole, optimizing performance and design according to specific needs.
Our high-precision casting impellers are crafted to guarantee peak performance. Available in robust materials such as cast iron, stainless steel, and bronze, these impellers exemplify durability and quality, ensuring your pump operates at its best in various conditions.
Our exceptional pump systems are categorized into two primary configurations:
1) "Flush" System - This involves the injection of a clean, cool liquid into the seal chamber, thereby enhancing the seal's operational environment. A secondary, smaller port, typically oriented downward, is often provided for leak observation or ventilation. This method significantly improves operational efficiency.
2) "Barrier or Buffer" System with Dual Seals - Designed for optimal performance, a secondary fluid is introduced between two mechanical seal sets. This innovation prevents ambient air from coming into contact with the pumped fluid, enhances seal cooling, and provides a superior level of safety during operation.
It is important to note that not all mechanical seals necessitate specialized external flush systems, showcasing the flexibility and versatility in our design solutions.
Flexible Couplings
Flexible couplings present a superior alternative to rigid couplings by accommodating movements such as vibrations and thermal expansions without causing damage. Their design is perfect for scenarios involving slight misalignments between drive and pump shafts. Additionally, they excel at minimizing operating noise due to their vibration-absorbing capacity. While they come with a more complex and costlier design, the long-term maintenance savings they offer by protecting shafts and bearings from premature wear make them an advantageous choice.
Our elite Semhai API standard chemical pumps are equipped with API 671 Standard Disc Couplings. This ensures adherence to the highest industry standards, delivering reliability and performance you can trust.
These couplings boast lower reaction loads, paired with an unparalleled balancing quality, surpassing standard couplings. They elevate the overall efficiency and effectiveness of the pump's power transmission, ensuring top-tier performance in every application.
| 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 numerous prestigious domestic pump-testing institutions, ensuring top-tier quality and performance for their state-of-the-art products. These collaborations include:
The esteemed National Quality Supervision and Inspection Center of Industrial Pumps located in Tiexi District, Shengyang City,
The renowned Irrigation Machinery Products Quality Inspection Center of Machinery Industrial based in Zhenjiang City,
The authoritative Ministry of Agriculture's Water Pump Quality Supervision and Testing Center situated in Chongqing City,
The reputable Shanghai Mechanical and Electrical Products Quality Inspection Center, right in the heart of Shanghai City, among others.
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