Discover the SLZ end suction, long coupled, single stage centrifugal chemical process pump. This marvel of engineering, standardized to EN 22858 / ISO 2858, is your versatile solution for both industrial and marine landscapes. Elegantly designed to move low viscosity clean or slightly tainted fluids, it efficiently handles the absence of solid or fibrous contaminants. From fresh water and sea water to fuels such as diesel, petrol, and kerosene, this pump is your ally in diverse applications: fuel transfer, chemical processing, energy plants, mining, firefighting, irrigation, water supply, water treatment, pressurization, grey water management, dewatering, and marine operations.
Introducing our robust, heavy-duty centrifugal chemical process pump, engineered to deliver high flow and high pressure. Its design ensures peak performance and reliability even in the most demanding environments.
Experience the advantages of our long coupled centrifugal chemical process pump design, crafted to offer unparalleled benefits and operational efficiency.
Thanks to its long coupled configuration, maintenance is a breeze. Enjoy the convenience of accessing the pump head without the need to remove the motor, simplifying service and upkeep.
Engineered for resilience, this process pump is built for continuous operation. Additional bearings installed in the pump head significantly reduce the strain on the motor, ensuring reliability and longevity.
The back pull out design is a true time-saver. It allows the motor to be removed while keeping the pump connected to the pipework, optimizing maintenance operations and minimizing downtime.
Our centrifugal chemical process pump features independent shafts for the pump and motor. This design innovation means that in the unlikely event of a shaft break, only the pump shaft requires replacement, unlike less robust models that necessitate motor replacement as well.
Our long coupled design ensures a generous space between the pump and motor, safeguarding the motor from fluid ingress in the rare event of a seal failure, enhancing durability and protection.
Product Summary
• Capable of pumping an extensive range of clean low viscosity or slightly contaminated fluids
• Choose between closed or semi-open impeller options for tailored performance
• Innovative back pull out design for swift and straightforward maintenance
• Handles maximum fluid temperatures up to 175°C with ease
• Features a heavy-duty shaft, expertly designed to avoid contact with fluids
• External seal cooling system can be integrated for enhanced performance
• Independent pump and motor shafts for simplified maintenance and repair
• Available in a variety of materials including cast iron, 316 stainless steel, duplex stainless steel, bronze, and more upon request
• Suction and discharge flanges meet EN 1092-2 / PN 16 standards, with steel and stainless steel casings conforming to EN 1092-1 / PN 16
• Choose from gland packing, single, double, or cartridge mechanical seal options
• Equipped with three-phase 50hz / 60hz motors, IP55 as standard for enhanced durability
• ATEX compliant version available upon request for specialized applications
• Independent certification can be provided upon request to meet regulatory requirements
• Crafted in accordance with the rigorous standards of EN 22858 / ISO 2858
• Features a low NPSH design for optimal performance in diverse conditions
• Allows for assembly without alignment, simplifying installation processes
• All impellers are meticulously balanced in accordance with ISO 1940 class 6.3
• Long coupled with baseplate for added stability and support
• Option to install an API Seal, compliant with API682 standards for enhanced reliability
• Incorporates oil lubricated ball bearings, ensuring smooth operation and longevity
| 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 Brand Bearings: Our centrifugal and chemical pumps are equipped with top-tier brand bearings, ensuring remarkable durability. Even amidst challenging working conditions, our pumps deliver a prolonged service life, offering unparalleled reliability.
Ingenious Axial Thrust Balancing: Our design incorporates wear rings both at the front and rear of most impellers, alongside a strategic balance hole on the impeller's back shroud. For pumps where axial thrust is minimal, these features are optimized, with no rear wear ring or balance hole required.
Precision-Crafted Casting Impellers: Engineered for peak performance, our impellers come in robust materials such as cast iron, stainless steel, and bronze, ensuring durable and efficient operations.
Our systems are classified into two principal categories:
1) "Flush System": This method introduces clean, cool liquid into the seal chamber, optimizing the operational environment. A secondary, typically downward-facing port doubles as a leakage observation or vent opening, enhancing monitoring and safety.
2) "Barrier or Buffer System" for dual seals: A secondary fluid circulates between two sets of mechanical seals, preventing ambient air infiltration, enhancing cooling, and bolstering safety measures.
It's noteworthy that certain mechanical seals operate efficiently without the need for specialized external flush systems.
Versatile Couplings
Flexible Couplings: Unlike their rigid counterparts, these couplings adeptly handle movements such as vibrations and thermal expansion. Ideal for scenarios with inevitable misalignment between drive and pump shafts, they effectively dampen vibrations, minimizing operational noise. Despite a more complex and costly design, the long-term maintenance savings due to shaft and bearing protection from premature wear provide significant value.
Our Semhai API standard chemical pumps are equipped with API 671 Standard Disc Couplings.
These couplings exhibit lower reaction loads and superior balancing quality compared to standard couplings, enhancing overall efficiency and effectiveness in 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 |
Elite Collaborations with Professional Agencies
Shanghai Semhai Pump Co., Ltd. has forged enduring partnerships with premier domestic pump-testing institutions, ensuring unmatched quality and innovation.
We proudly collaborate with the National Quality Supervision and Inspection Center of Industrial Pumps, located in Tiexi District, Shenyang City, a beacon of excellence in pump testing.
Our alliance with the Irrigation Machinery Products Quality Inspection Center of Machinery Industrial, based in Zhenjiang City, exemplifies our commitment to superior quality standards.
Through our association with the Ministry of Agriculture's Water Pump Quality Supervision and Testing Center in Chongqing City, we uphold the highest quality benchmarks in agricultural water pump testing.
In Shanghai City, our partnership with the Shanghai Mechanical and Electrical Products Quality Inspection Center further solidifies our dedication to mechanical and electrical product excellence.
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