Introducing the SLZ end suction, long coupled, single stage centrifugal chemical process pump, meticulously engineered to comply with EN 22858 / ISO 2858 standards. This versatile pump is adept at handling a broad spectrum of industrial and marine applications. Equipped to efficiently transport low viscosity fluids—be they clean or slightly contaminated—sans any solid or fibrous inclusions. Ideal for pumping fresh and sea water, as well as various fuels such as diesel, petrol, and kerosene, this pump finds its utility in fuel transfer, chemical processing, energy plants, mining operations, fire fighting, irrigation, water supply, treatment, pressurization, grey water management, dewatering, and marine operations.
Meet the powerhouse of centrifugal chemical process pumps: a robust, heavy-duty marvel designed to deliver high flow and pressure capabilities, making it indispensable for industrial heavy lifting.
The innovative long coupled centrifugal chemical process pump design offers a wealth of advantages that streamline operations and enhance performance.
Thanks to the long coupled configuration, routine maintenance becomes a breeze. The pump head is readily accessible without the hassle of motor removal, ensuring operational efficiency.
This process pump boasts exceptional durability for uninterrupted use, featuring additional bearings in the pump head to alleviate significant stress from the motor during function.
The back pull out design is a game-changer, allowing for motor removal while keeping the pump connected to the pipework—ultimately saving precious time during service or maintenance.
With independent shafts for the pump and motor, replacement becomes hassle-free. Should a pump shaft break, only it needs replacing, unlike less robust models where a broken shaft requires a full motor replacement.
The long coupled design ensures a generous gap between pump and motor, safeguarding the motor from fluid ingress should a seal failure occur.
Product Summary
• Capable of pumping a diverse range of clean, low viscosity, or slightly contaminated fluids efficiently.
• Choose from closed or semi-open impeller variations to suit specific needs.
• Quick and effortless maintenance is ensured with the back pull out design.
• Endures a maximum fluid temperature of up to 175°C, showcasing remarkable heat resistance.
• Equipped with a heavy-duty shaft that remains untouched by the fluid, ensuring durability.
• Option for an external seal cooling system to enhance operational efficiency.
• Features independent pump and motor shafts for simplified repairs.
• Available in materials like cast iron, 316 stainless steel, duplex stainless steel, bronze, with custom requests welcome.
• Suction and discharge flanges meet EN 1092-2 / PN 16 standards, with EN 1092-1 / PN 16 for steel and stainless steel casings.
• Gland packing or mechanical seal options, including single, double, and cartridge, are offered to cater to diverse requirements.
• Compatible with three-phase 50Hz/60Hz motors, IP55 rated as standard for robust performance.
• ATEX version available upon request, tailored for sensitive environments.
• Independent certification available, ensuring quality assurance for discerning customers.
• Crafted in adherence to EN 22858 / ISO 2858 standards, guaranteeing superior quality and reliability.
• Low NPSH value for increased efficiency and reduced cavitation risk.
• Assembly is simplified with a design that requires no alignment, promoting ease of installation.
• All impellers are meticulously balanced in accordance with ISO 1940 class 6.3, ensuring smooth operation.
• Long coupled with a sturdy baseplate, ensuring stability and reliability during operations.
• An API Seal can be installed in accordance with API682 standards, catering to high-demand applications.
• Oil-lubricated ball bearings enhance performance and longevity, delivering 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 |
Our centrifugal pumps and chemical pumps proudly incorporate renowned brand bearings, ensuring a robust and durable performance. These pumps are engineered to thrive even in the most demanding environments, promising an extended service life.
To masterfully balance axial thrust, our advanced impeller design features wear rings strategically placed both at the front and the back. This, coupled with a precisely engineered balance hole on the impeller's back shroud, ensures optimal performance. For pumps with minimal axial thrust, a streamlined design without a rear wear ring or balance hole is implemented.
The high-precision casting of our impellers guarantees superior performance. They are meticulously crafted from materials such as cast iron, stainless steel, and bronze to meet diverse application demands.
There are generally two main groups:
1) "Flush" - This method introduces a pristine, cool liquid into the seal chamber, significantly enhancing the operating environment. An additional, smaller port, typically positioned downward, serves as a leakage monitor or vent opening.
2) "Barrier or Buffer" for dual seals - This technique involves infusing a secondary fluid into the space between two mechanical seals. This prevents atmospheric air from interacting with the pumped fluid, optimizes seal cooling, and bolsters safety.
It's important to note that not every mechanical seal requires specialized external flush arrangements.
Flexible couplings
Flexible couplings are the champions of adaptability, designed to accommodate minor movements such as vibrations and thermal expansions without sustaining damage. They are the perfect choice for situations with unavoidable misalignment between the drive and pump shafts. Their ability to absorb vibrations translates to reduced operational noise. Although they boast a more intricate and costly design, their ability to shield the shaft and bearings from potential damage and premature wear leads to significant long-term maintenance savings.
Semhai API standard chemical pumps utilize the highly reliable API 671 Standard Disc Couplings.
These couplings offer remarkably lower reaction loads and superior balancing quality compared to standard couplings. This translates to enhanced efficiency and effectiveness in the pump's overall 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: We are proud to be partnered with some of the most esteemed organizations in the industry, enhancing our capabilities and reinforcing our commitment to excellence.
This company has established long-term cooperation relationships with a number of large domestic pump-testing institutions, such as: Our reputation is strengthened by our strategic alliances with leading domestic pump-testing institutions, ensuring that our products meet rigorous standards and are continuously improved.
National Quality Supervision and Inspection Center of Industrial Pumps (Tiexi District, Shengyang City): Renowned for its stringent quality assessments, this institution supports our quest for excellence in every product we deliver.
Irrigation Machinery Products Quality Inspection Center of Machinery Industrial (Zhenjiang City): Pioneers in irrigation machinery inspection, they endorse our innovative approach to pumping solutions.
Ministry of Agriculture, Water Pump Quality Supervision and Testing Center (Chongqing City): A testament to our commitment to quality, this esteemed center ensures our water pumps meet and exceed industry standards.
Shanghai Mechanical and Electrical Products Quality Inspection Center (Shanghai City) and so on: With a foundation in mechanical and electrical excellence, this partnership helps us maintain our edge in delivering superior products.
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