Introducing the SLZ end suction, long coupled, single-stage centrifugal chemical process pump, meticulously standardized to EN 22858 / ISO 2858. This versatile powerhouse is crafted for a plethora of applications spanning the industrial and marine arenas. Its design excels in handling low viscosity fluids, whether pristine or slightly adulterated, provided they are devoid of solid or fibrous impurities. It effortlessly channels liquids such as fresh water, sea water, and various fuels—including diesel, petrol, and kerosene—making it an indispensable asset for fuel transfer, chemical processing, energy plant operations, mining, firefighting, irrigation, water supply, water treatment, pressurization, grey water management, dewatering, and marine services.
Unveiling a robust and high-performance centrifugal chemical process pump, engineered for large-scale operations with its formidable high flow and pressure capabilities.
Discover the manifold benefits of our ingeniously crafted long coupled centrifugal chemical process pump design.
The long coupled configuration shines with its maintenance-friendly design, allowing effortless access to the pump head without necessitating motor removal.
Engineered for relentless operation, this process pump boasts exceptional durability. The inclusion of auxiliary bearings within the pump head significantly alleviates motor stress during use, ensuring longevity and reliability.
Thanks to the back pull out design, the motor can be conveniently detached while keeping the pump connected to the pipework, optimizing time efficiency during service or maintenance.
Our centrifugal chemical process pump features independently functioning shafts for both the pump and motor. In the rare event of a pump shaft breakage, only the shaft requires replacement, unlike other models where a motor shaft failure necessitates replacing the entire motor.
The innovative long coupled design creates a generous gap between pump and motor, safeguarding the motor from fluid intrusion in case of seal malfunction.
Product Summary
• Capable of handling a diverse array of clean, low viscosity, or slightly contaminated fluids with ease.
• Offered with closed or semi-open impeller options to suit varied needs.
• Features a back pull out design for swift and hassle-free maintenance processes.
• Accommodates maximum fluid temperatures up to 175°C.
• Constructed with a heavy-duty shaft that remains untouched by fluid contact.
• Available with an external seal cooling system to enhance performance.
• Equipped with independent pump and motor shafts for added reliability.
• Manufactured in various materials, including cast iron, 316 stainless steel, duplex stainless steel, bronze, and customizable options upon request.
• Suction and discharge flanges adhere to EN 1092-2 / PN 16 standards, with alternatives for steel and stainless steel casings conforming to EN 1092-1 / PN 16.
• Offers gland packing or single, double, and cartridge mechanical seal options to meet diverse requirements.
• Available with three-phase 50Hz / 60Hz motors, featuring IP55 as a standard.
• ATEX-certified versions available upon request, ensuring safety in explosive atmospheres.
• Independent certification can be provided upon request for added assurance.
• Meticulously manufactured in compliance with EN 22858 / ISO 2858 standards to guarantee precision.
• Designed with low NPSH characteristics for optimal performance.
• Enables assembly without alignment, simplifying installation.
• All impellers are precision-balanced to ISO 1940 class 6.3 standards for smooth operation.
• Features a long coupled configuration complete with baseplate for added stability.
• Option to install an API Seal, conforming to API682 for enhanced sealing solutions.
• Incorporates oil-lubricated ball bearings to ensure smooth and 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 |
Renowned for their excellence, our centrifugal and chemical pumps boast the integration of famous brand bearings, ensuring a robust and enduring performance. Even amidst the harshest working conditions, the longevity of our pumps stands as a testament to our commitment to quality and durability.
Our advanced design incorporates wear rings both at the front and rear of most impellers, complemented by a strategically placed balance hole on the impeller's back shroud. This configuration is engineered to balance axial thrust with precision. However, in scenarios where the axial thrust is minimal, the design cleverly omits the rear wear ring and balance hole, optimizing efficiency.
Crafted with high-precision, the casting impellers within our pumps guarantee superior performance. Available in materials such as cast iron, stainless steel, and bronze, they offer versatile solutions tailored to diverse operational needs.
Our mechanical seals are categorized into two primary groups:
1) "Flush" - This technique involves injecting a clean, cool liquid into the seal chamber to create an optimal operating environment. A secondary, typically downward-oriented port often serves as a leakage observation or vent opening, enhancing safety and monitoring.
2) "Barrier or Buffer" - Employed with dual seals, this method introduces a secondary fluid between two mechanical seals. This prevents ambient air from contacting the pumped fluid, thereby improving cooling, enhancing safety, and maintaining the integrity of the seal.
It's noteworthy that not every mechanical seal demands special external flush arrangements, making them adaptable to various system requirements.
Flexible Couplings
In contrast to their rigid counterparts, flexible couplings are engineered to absorb movements such as vibrations and thermal expansions without causing damage. This flexibility makes them ideal for applications with unavoidable misalignment between drive and pump shafts. Furthermore, their ability to mitigate vibrations contributes to reduced operational noise. Although they present a more complex and costly design, the long-term maintenance savings, due to protection against shaft and bearing damage, are substantial.
Semhai API standard chemical pumps integrate API 671 Standard Disc Couplings, setting a benchmark in reliability and performance.
These couplings deliver lower reaction loads and boast superior balancing quality compared to conventional couplings, resulting in enhanced efficiency and effectiveness across 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
Our company proudly maintains a robust and enduring collaboration with several prestigious domestic pump-testing institutions, ensuring quality and reliability at every stage. Our valued partners include:
The National Quality Supervision and Inspection Center of Industrial Pumps, located in Tiexi District, Shengyang City, a leader in industrial pump testing.
The Irrigation Machinery Products Quality Inspection Center of Machinery Industrial in Zhenjiang City, setting standards in irrigation machinery testing.
The Ministry of Agriculture, Water Pump Quality Supervision and Testing Center in Chongqing City, dedicated to agricultural water pump excellence.
The Shanghai Mechanical and Electrical Products Quality Inspection Center in Shanghai City, renowned for its comprehensive mechanical and electrical product evaluation. And many more esteemed institutions.
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